`
`
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`MOTHERSON
`EXHIBIT 1003
`
`MOTHERSON
`
`EXHIBIT 1003
`
`
`
`(12) UK Patent Application
`
`(19) GB (11)
`
`(43) Date of A publication 18.12.1991
`
`(51) INT CL5
`B60R 1/06
`
`(52) UK CL (Edition K)
`B7J J69
`
`(56) Documents cited
`None
`
`(58) Field of search
`UK CL (Edition K) B7J
`INT CL6 860R 1106
`
`(21) Application No 9109376.5
`
`(22) Date of tiling 01.05.1991
`
`(30) Priority data
`(31) 53026B90
`
`(32) 15.05.1990
`
`(33) IT
`
`(71) Applicant
`Gllardlnl SpA
`
`(Incorporated In Italy)
`
`10152 Torino, Via Cuneo 20, Italy
`
`(72) Inventor
`Elio Lupo
`
`(74) Agent and/or Address for Service
`Venner Shipley and Co
`368 City Road, London, EC1V 20A, United Kingdom
`
`(54) Rear-view mirror for a vehicle
`
`(57) An external rear-view mirror for a motor vehicle includes a support bracket (2) adapted to be fixed to a side portion of
`the vehicle bodywork, a hollow outer body (3), a reflective plate (4) supported in a frontal aperture (5) in the body (3), a first
`movable support (7) housed at least partly within the body (3) and mounted for rotation on the bracket (2) about a first,
`substantially vertical axis of rotation (A), a second movable support (51) fixed to and housed within the body (3) of the mirror
`and being rotatable relative to the first support (7) about a second, substantially horizontal axis (B) which is parallel to the
`reflective plate (4), a first electric motor (14) and first transmission means (16, 18) for rotating the first support about the first
`axis, a second electric motor (55) and second transmission means (57, 59) for rotating the second support (51) about the
`second axis (B); both the motors (14, 55) and the transmission means (18, 59) being housed in the first movable
`support (7).
`
`--
`
`Fig.1
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`5
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`~
`~
`c.o
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`0,
`)>
`
`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 1
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`
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`Fig.1
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 2
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`
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`52
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`51
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`52
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`54
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`Fig.2
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 3
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`· Fig. 3
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`6
`\
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`44
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`76
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`c(- (cid:173)
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`_1..- -
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`Fig.4
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`I ' 80
`
`I
`I
`I
`I
`
`I
`\
`
`/ ~ - r (cid:173)
`I
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 4
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`
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`-1-
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`REAR-VIEW MIRROR FOR A VEHICLE
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`The present invention relates to a lateral rear-view
`
`mirror for a vehicle, and particularly to a mirror having
`
`mechanisms for adjusting its orientation which can be
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`operated by electric motors. Rear-view mirrors of the
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`said type are known in which the reflective plate is
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`mounted on a support housed within the body of the mirror
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`and attached to the body itself by a ball joint. The
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`orientation of the reflective plate relative to the mirror
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`body can be adjusted by means of two electric motors which
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`act through suitable transmission devices to rotate the
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`said support about two mutually-perpendicular axes which
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`pass through the centre of the ball joint. A third
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`electric motor adjusts the angular position of the mirror
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`body relative to the bQdywork about a substantially
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`vertical axis about which the body is pivoted on the
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`bodywork itself.
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`A disadvantage of these known mirrors of the type
`
`described is the presence of these three motors and their
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`supply cables and control means which increase the overall
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`cost. A further disadvantage of the use of a reflective
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`plate which can be orientated relative to the body of the
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`mirror is the lack of sealing between the outer edge of
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`the reflective plate and the inner wall of the body with
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`obvious problems due to the ingress of dust and moisture.
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`Other rear-view mirrors are known in which the reflective
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 5
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`-2-
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`plate is fixed to the mirror body and of its orientation
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`is adjusted by means of two electric motors housed within
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`the body itself. Known mirrors made in accordance with
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`the latter solution do not have the disadvantages
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`mentioned above; they are, however, particularly
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`complicated from a mechanical point of view and the
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`manufacture and assembly of the components is therefore
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`burdensome. Moreover,
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`these mirrors do not generally
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`allow manual adjustment of the inclination about both axes
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`should the motors break down .
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`The object of the present invention is to provide an
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`external rear-view mirror for a motor vehicle, which is
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`free from the disadvantages connected with known mirrors
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`15
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`as specified above.
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`This object is achieved by the present invention in that
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`it relates to an external rear-view mirror for a motor
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`vehicle, of the type including a support bracket adapted
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`20
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`to be fixed to a side portion of the motor-vehicle
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`bodywork, a hollow outer body, a reflective plate
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`supported in a frontal aperture in the body, first support
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`means for the body housed at least partly within the body
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`and mounted for rotation relative to the bracket about a
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`25
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`first axis of rotation which is substantially-vertical,
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`second support means for the body fixed to and housed
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`within the body and rotatable relative to the first
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`support means about a second, substantially- horizontal
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 6
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`-3-
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`axis which is parallel to the reflective plate, first
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`drive means and first transmission means for rotating the
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`first support means about the first axis, second drive
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`means and second transmission means for rotating the
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`second support means about the second axis, characterised
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`in that the first and second drive means and the first
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`and second transmission means are carried by the first
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`support ~eans.
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`In order to provide a better understanding of the present
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`invention, a preferred embodiment thereof is described
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`below, purely by way of non-limiting example, with
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`reference to the appended drawings, in which :
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`Figure 1 is a partially-sectioned plan view from above of
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`a rear-view mirror formed in accordance with the
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`principles of the present invention;
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`Figure 2 is a section taken in the plane of the line II-II
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`in Figure 1;
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`Figure 3 is a perspective view of a control mechanism
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`within the mirror of Figure 1, showing the components
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`separated; and
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`Figure 4 is a diagram of an electrical circuit associated
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`with the mirror.
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 7
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`With reference to the drawings, an external rear-view
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`mirror for a motor vehicle is generally indicated 1.
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`The mirror 1 includes a support 2 only part of which is
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`illustrated and which is adapted to be fixed to a side
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`portion of
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`the motor-vehicle bodywork, a hollow body 3
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`cantilevered on one end of the bracket 2, and a reflective
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`plate 4 fixed to the body 3 in a frontal apertures
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`thereof.
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`The body 3 houses a drive assembly 6 for the mirror l
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`which can adjust the orientation of the body 3, and hence
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`of the plate 4 f i xed thereto, relative to the support
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`bracket 2 by means of relative rotations about a first,
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`substantially-vertical axis A and a second substantially(cid:173)
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`horizontal axis B parallel to the plane of the plate 4.
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`The assembly 6, illustrated in detail in Figure 3,
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`includes a movable support 7 having a tubular end portion
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`8 projecting from one end of the body 3 and articulated,
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`as will be clarified below, on a cylindrical pin 9
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`defining the axis A and integral with the bracket 2.
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`The movable support 7 is in the form of a hollow,
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`upwardly-open box with a complex geometry;
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`a cover 10 is
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`fixed to the support 7 and defines a closed casing
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`therewith. The support 7 houses a first electric motor 14
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 8
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`arranged with its axis horizontal and perpendicular to the
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`plate 4 for rotating it about the axis A, and also houses
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`the transmission train which couples the motor 14
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`rotationally to a gear 17 coaxial with the pin 9 (and
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`hence with the axis A) and coupled to the pin as will be
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`clarified below. The transmission train is constituted
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`specifically by a worm gear 16 and a geared reduction unit
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`18 with external teeth, an input gear 19a of which is
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`meshed with the worm 16, and an output gear 22b of which
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`is meshed with the gear 17. More particularly, the
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`reduction unit 18 consists of four rotors 19, 20, 21, 22
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`in cascade, each of which defines an integral pair of
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`gears 19a, 19b, 20a, 20b; 21a, 21b; 22a, 22b of different
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`diameters;
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`the larger diameter gears 19a; 20a; 21a; 22a
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`mesh with the pr eceding element in the drive train (worm
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`16, gears 19b, 20b, 21b respectively) while the smaller
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`diameter gears (19b, 20b, 21b, 22b) mesh with the
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`subsequent element in the drive train (gears 20a, 21a,
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`22a, 17 respectively). The rotors 19 and 21 are rotatable
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`on a common, vertical-axis shaft 23 supported between the
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`support 7 and the cover 10; the rotors 20 and 22 are
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`rotatable on respective pins 24 and 25 which also have
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`vertical axes and are supported between the support 7 and
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`the cover 10.
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`The tubular end 8 of the movable support 7 houses a
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`cylindrical bush 27 having an upper end wall 28 and a
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`radial lower flange 29. The bush 27 is mounted on the pin
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`9 of the bracket 2; the end wall 28 and the flange 29 co-
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 9
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`operate axially with a corresponding end wall 30 of the
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`pin 9 and an annular portion 31 of the bracket 2
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`surrounding the base of the pin 9, respectively. The
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`flange 29 has a plurality of radial projections 34 of
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`substantially semi-circular section which are adapted to
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`fit into respective seats 35 formed in the portion 31 of
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`the bracket 2 so as to couple the bush 27 against
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`rotation relative to the pin 9. The gear 17 co-operates
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`axially with the end wall 28 of the bush 27. The gear 17,
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`the said end wall 28 and the corresponding wall 30 of the
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`pin 9 have central apertures and house a tubular member 36
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`with radial end flanges 37 which constitute axial stops
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`for respective rings 38,39 mounted on the member 36
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`itself . A helical spring 42 housed within the pin 9 and
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`around the tubular member 36 is compressed between the
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`ring 39 and the end wall 30 of the pin 9 so as, together
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`with the gear 17 and through the member 36 and the member
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`38, to exert an axial compressive force on the wall 28 of
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`the bush 27: because of the friction, frictional coupling
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`is thus achieved between the gear 17 and the bush 27.
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`The said projections 34 of the bush 27 and the
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`corresponding seats 35 in the bracket 2, under the load
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`exerted by the spring 42, constitute a safety coupling of
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`known type arranged to disconnect the coupling in
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`the case of external knocks.
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`The tubular member 36 also constitutes a guide through
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 10
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`which supply cables for the electric motors 14, 55, pass
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`into the body J.
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`The bracket 2, the part of the movable support 7
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`projecting from the body 3 of the mirror, and those
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`components forming the coupling between them are protected
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`by a bellows sleeve 41, conveniently of elastermeric
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`material.
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`On the opposite end of the support 7 from the bracket 2 is
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`cantilevered a cylindrical, horizontal-axis pin 42, a
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`I
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`tubular member 45 being mounted thereon between a pair of
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`washers 44 and retained axially by a resilient stop-ring
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`46.
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`A cylindrical bush 50 is slidable on the tubular member 45
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`and constitutes the central portion of a second movable
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`support 51 which is approximately H- shaped in that it has
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`four substantially flat appendages 52 arranged in pairs
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`alongside each other and formed integrally with and
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`projecting from the bush 50. These appendages 52 bear on
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`respective projections 53 within the body 3 and are fixed
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`thereto by respective screws 54.
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`The first movable support 7 and its cover 10 also house a
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`second electric motor 55 arranged with its axis horizontal
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`and substantially perpendicular to the plane of the
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`reflective plate and which rotates the second support 51
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`about the axis B, the support 7 also housing the
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 11
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`respective transmission train which couples the motor 15
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`rotationally to a gear 58 mounted on the tubular member 45
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`in axial abutment with an end wall 61 of the bush 50.
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`More particularly, the transmission train consists of a
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`worm gear 57 on the output shaft of the motor 55 and a
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`geared reduction unit 59 with external teeth, including an
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`input gear 64A which meshes with the worm 57 and an output
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`gear 67B of which is meshed with the gear 58. More
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`particularly, the reduction unit 59 is constituted by four
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`rotors 64, 65, 66, 67 in cascade, each of which defines an
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`integral pair of gears 64a, 64b; 65a, 65b; 66a, 66b; 67a,
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`67b of different diameters; the larger diameter gears 64a;
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`65a; 66a; 67a mesh with the preceding member in the
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`kinematic chain (worm 57, gears 64b, 65b, 66b
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`respectively), the smaller diameter gears 64b, 65b, 66b,
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`67b mesh with the subsequent member in the kinematic chain
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`(gears 65a, 66a, 66a, 67a, 58 respectively) the rotors 64,
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`66 and 65, 67 are rotatable on respective coMon shafts 69
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`and 70 arranged with their axes horizontal and parallel to
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`the axis Band supported by the support 51.
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`The gear 58 is interposed axially between the bush 50 and
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`a radial end flange 74 of the tubular member 45. A
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`helical spring 73 housed within a cavity in the bush 50
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`and around the tubular member 45 is compressed between an
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`axial shoulder 75 of the bush 50 and a stop ring 76
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`mounted on the tubular member 45 and retained axially by
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`an end flange 77 of the member 45 opposite the said
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 12
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`-9-
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`shoulder 75 so as, together with the gear 58, to exert an
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`axial compressive force on the wall 61 of the bush 50
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`through the member 45: because of the friction, frictional
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`coupling is thus achieved between the gear 58 and the bush
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`50 and hence the support member 51 to which the body 3 and
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`the reflective plate 4 are fixed.
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`Conveniently , the electric motors 14, 55 are controlled by
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`a conventional electronic unit 80 arranged to receive
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`input signals from control push buttons 81, 82 within the
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`passenger compartment of the vehicle. These push buttons
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`may, for example, be of the rocker type such that the
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`rotation of the motors in the two senses may be controlled
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`through only two push buttons . Preferably the mirror 1 is
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`also provided with position sensor means 83, shown
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`schematically in figure 4, and arranged to supply the
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`control unit 80 with signals indicative of the angular
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`position of the body 3 of the mirror relative to the
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`support bracket 2. Conveniently the control unit 80 is
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`arranged to memorise the angular position relative to the
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`axis A chosen by the driver. The operation of the mirror
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`1 is as follows.
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`The corresponding push button (for example 81) being
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`operated, the unit 80 supplies the motor 14. The drive
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`torque generated by the motor 14 is transmitted by the
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`worm 16 to the reduction unit 18 and hence to the gear 17 .
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`This latter is held in frictional contact with the bush 27
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`by means of the spring 42 the load of which is such as to
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 13
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`generate a frictional resistive torque on the gear 17
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`sufficient to balance the drive torque applied thereto;
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`the bush 27 is in turn fixed against rotation relative to
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`the bracket 2 by the engagement of the projection~ 34 with
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`their seats 35. Consequently, the gear 27 remains
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`stationary and the torque generated by the motor 14 causes
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`the output gear 22b of the reduction unit 18 to revolve
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`around the gear 27 and, hence, the movable support 7
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`(which carries the pin 25 of the gear 22b) about the bush
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`27 on which it is pivoted (that is, about the axis A).
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`The body 3 of the mirror, which is fixed to the second
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`movable support 51 carried by the first movable support 7
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`by means of the pin 42, is thus also rotated about the
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`axis A.
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`Conveniently, the control unit 80 is programmed to vary
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`the voltage supplied, and hence the speed of the motor 14,
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`in dependence on the angular position of the body 3
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`detected by the sensor means 83; in particular, it may be
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`convenient to identify an angle a of fine adjustment
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`around the serv ice position previously memorised by the
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`unit 80 (for example, with an amplitude of± 12°) in which
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`the motor is operated at low speed so as to enable a
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`different service position to be determined. Outside this
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`angle, it may be convenient to operate the motor 14
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`rapidly to enable rapid movement towards the bodywork.
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`This rapid operation may conveniently be limited to
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`movement in the rearward directi9n, which may be required
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 14
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`-11-
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`by the driver in certain conditions (passage through
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`narrow gaps, etc), whilst movement in the opposite sense
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`may be reserved to mechanical operation alone.
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`If the other push button 82 is operated, the control unit
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`10 activates the motor 55 which rotates the gear 58
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`through the worm gear 57 and the reduction unit 59. The
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`gear 58 is held in axial abutment with the bush 50 by the
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`load of the spring 73 in conditions of frictional
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`adherence; hence, the movable support 51 and the body 3
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`connected thereto rotate about the axis B together with
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`the gear 58. It is thus always possible to adjust the
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`angular position of the mirror body 3 relative to the
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`bracket 2 about both rotational axes A and B by manual
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`action on the body 3 with sufficient force to overcome the
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`frictional torque between the gear 17 and the bush 27 (for
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`rotations about the axis A) and between the gear 58 and
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`the bush 50 (for rotations about the axis B), these
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`torques being produced by the loading due to the
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`respective springs 42, 73.
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`In such events, the gears 17
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`or 58 slide relative to the respective bushes 27 or 50 and
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`enable the motor 18 or 55 and the respective drive train
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`to be disengaged.
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`A study of the characteristics of the mirror 1 just
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`described will show the advantages which it achieves.
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`Indeed, since the motors and their transmission members
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`are mounted on a single support, the operating mechanism 6
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 15
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`is particularly simple, compact and economic to produce
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`and assemble.
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`In particular, the sub-assembly constituted
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`by the support 7, the motors 14, 15 the transmission
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`members mounted thereon and the cover 10 may be pre(cid:173)
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`assembled before the final assembly of the mirror, with
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`obvious simplification of the assembly cycle.
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`Moreover, should the electric motors 14, 55 or the
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`electrical circuitry fail, the operational effectiveness
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`of the mirror is not compromised, manual adjustment always
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`being possible. Finally, the electrical circuit required
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`is particularly simple since the mirror includes only two
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`motors housed within the body.
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`Finally, it is clear that the mirror 1 described may be
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`modified and varied without thereby departing from the
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`scope of protection of the present invention. For
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`example, the arrangement of the motors 14, 55 the
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`characteristics and arrangement of the reduction units 18,
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`59 and of the control logic of the unit 80 for the
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`electric motors 14, 55 may be varied.
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 16
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`-13-
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`CLAIMS
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`1. An external rear-view mirror for a motor vehicle, of
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`the type including a support bracket adapted to be fixed
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`to a side portion of the motor-vehicle bodywork, a hollow
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`outer body, a reflective plate supported in a frontal
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`aperture in the body, first support means for the body
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`housed at least partly within the body and mounted for
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`rotation relative to the bracket about a first axis of
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`rotation which is substantially vertical, second support
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`means for the body fixed to and housed within the body,
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`and rotatable relative to the first support means about a
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`second, substantially-horizontal axis which is parallel to
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`the reflective plate, first drive means and first
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`transmission means for rotating the first support means
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`about the first axis, second drive means and second
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`transmission means for rotating the second support means
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`about the second axis, characterised in that the first and
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`second drive means (15,55) and the first and second
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`transmission means (16,18; 57,59) are carried by the first
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`support means (7,10).
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`2. A mirror according to Claim 1, characterised in that
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`it includes first frictional coupling means (17,27) for
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`rotational coupling between the first transmission means
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`(18) and the support bracket (2).
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 17
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`3. A mirror according to any one of the preceding claims,
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`characterised in that the first transmission means include
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`a geared reduction unit (18).
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`4. A mirror according to Claim 2, characterised in that
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`the frictional coupling means include a gear (17) meshed
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`with an output gear (22b) of the reduction unit, a
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`friction surface (28) rigid with the bracket (2) and first
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`resilient means (42) for maintaining the gear (17) in
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`axial abutment with the friction surface (28).
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`5. A mirror according to Claim 4, characterised in that
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`the bracket (2) has an integral pin (9) defining the first
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`axis of rotation (A);
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`the first s upport means (7) include
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`a tubular portion (8) pivoted on the pin (9 ) with the
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`interposition of a bush {27) fixed. to the bracket against
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`relative rotation by engagement means (34,35) loaded by
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`the first resilient means (42) .
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`6. A mirror according to Claim 5, characterised in that
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`the friction surface is constituted by an end wall (28) of
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`the bush (27) .
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`7. A mirror according to any one of the preceding claims,
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`characterised in that it includes second frictional
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`coupling means (58,50) for rotational coupling between the
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`second transmission means (59) and the second support
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`means (51),
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`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 18
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`
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`-15-
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`8. A mirror according to any one of the preceding claims,
`
`characterised in that the second transmission means
`
`include a geared reduction unit (59).
`
`5
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`10
`
`15
`
`9. A mirror according to Claim 8, characterised in that
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`the second frictional coupling means include a gear (58)
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`meshed with an output gear (67b) of the respective
`
`reduction unit (59), a friction surface (61) rigid with
`
`the second support means (51) and second resilient means
`
`(73) for maintaining the gear (58) in axial abutment with (cid:173)
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`the friction surface (61).
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`10. A mirror according to Claim 9, characterised in that
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`the second support means (51) include an integral bush
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`(50) rotatable on a pin (42) fix~d to the first support
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`I
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`means (7) and defining the second axis of rotation (B).
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`11. A mirror according to Claim 10, characterised in that
`
`the friction surface is constituted by an end wall (61) of
`
`20
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`the bush (50).
`
`12. A mirror according to any one of Claims 8-11,
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`characterised in that the geared reduction units (18;59)
`
`include a plurality of rotors (19,20,21,22; 64,65,66,67),
`
`25
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`each of which defines two integral gears (19a, 19b; 20a,
`
`20b; 21a, 21b; 22a, 22b; 64a, 64b; 65a, 65b; 66a, 66b;
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`67a, 67b) of different diameters, the larger of which
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`(19a; 20a; 21a; 22a; 64a; 65a; 66a; 67a) meshes with the
`
`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 19
`
`
`
`•
`
`-16-
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`preceding element and the smaller of which (19b; 20b; 21b;
`
`22b; 64b; 65b; 66b; 67b) meshes with the subsequent
`
`element of the respective transmission means.
`
`5
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`13. A mirror according to any one of the preceding 'claims,
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`characterised in that the first support means include an
`
`essentially box-shaped hollow support (7) and a cover (10)
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`fixed to the support (7) and defining a closed casing
`
`therewith which houses the drive means (14,55) and the
`
`10
`
`transmission means (18, 59).
`
`14. An e xternal rear-view mirror for a motor vehicle,
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`substantially as described and illustrated in the appended
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`dr awings.
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`15
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`20
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`25
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`PubUshcd 1991 at The Patent Office. Concept House, Card UT Road. Ncwpon. Qwem NP9 I RH. Further copies may be ob1'llncd from
`Sales Branch, Unit 6. Nine Mile Point, C\l.mfellnfach. Cross Keys. Newport. NPI 7HZ. Printed by Mu lUplcx techniques ltd. St Mary Cray. Kent.
`
`Motherson Innovations v. Magna Mirrors
`Motherson Exhibit 1003, Page 20
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`
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