`Kotlarski
`
`(10) Patent N0.:
`(45) Date of Patent:
`
`US 6,523,218 B1
`Feb. 25, 2003
`
`US006523218B1
`
`(54) WIPER BLADE FOR WINDOW PANES OF
`MOTOR VEHICLES
`
`6,449,797 B1 * 9/2002 De Block ............ .. 15/250.201
`FOREIGN PATENT DOCUMENTS
`
`(75) Inventor: Thomas Kotlarski, Bad Neuenahr (DE)
`
`(73) Assignee: Robert Bosch GmbH, Stuttgart (DE)
`
`( * ) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`(21) Appl. No.:
`
`09/601,747
`
`(22) PCT Filed:
`
`Sep. 19, 1999
`
`(86) PCT No.:
`
`PCT/DE99/03015
`
`§ 371 (6)0)’
`Sep. 15, 2000
`(2), (4) Date:
`(87) PCT Pub. No.: WO00/34090
`
`PCT Pub. Date: Jun. 15, 2000
`Foreign Application Priority Data
`
`(30)
`
`Dec. 7, 1998
`
`(DE) ....................................... .. 198 56 300
`
`(51) Int. Cl.7 ............................. .. B60S 1/38; B60S 1/40
`(52) US. Cl. ............................ .. 15/250.201; 15/250.43;
`15/250.32; 15/250.48
`(58) Field of Search ..................... .. 15/250201, 250.43,
`15/250.44, 250.32, 250.361, 250.453, 250.452,
`250.451, 250.48
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`3,317,945 A * 5/1967 Ludwig ................. .. 15/250.43
`6,279,191 B1 * 8/2001 Kotlarski et al. .... .. 15/250.201
`6,295,690 B1 * 10/2001 Merkel et al. ....... .. 15/250.201
`
`Z5
`
`DE
`DE
`DE
`DE
`DE
`EP
`FR
`FR
`FR
`GB
`
`* 4/1958
`1028896
`14 30 589 A 12/1968
`1 505 357
`5/1969
`15 05 397 A 10/1969
`196 27 115 A
`1/1998
`0316114
`* 5/1989
`1239780
`* 7/1960
`2222855
`* 10/1974
`2222853
`* 10/1994
`1 429 820 A
`3/1976
`
`____________ __ 15/250.43
`
`............ .. 15/250.43
`
`............ .. 15/250.43
`
`* cited by examiner
`
`Primary Examiner—Gary K. Graham
`(74) Attorney, Agent, or Firm—Michael J. Striker
`(57)
`ABSTRACT
`
`A Wiper blade (10) for Windows of motor vehicles is
`proposed, Which is equipped With an elastic, elongated
`support element for an elongated Wiper strip (22), Which
`strip comprises a ?exible material and can be placed against
`the Window (28) to be Wiped With a Wiper lip (30) and Which
`on its long sides has opposed longitudinal grooves (34), in
`Which spaced-apart longitudinal rails (32) of the support
`element (12) are located, Which rails are secured in the
`grooves (34) by at least one retainer (36,38,40) that spans the
`spacing on the side of the support element (12) remote from
`the Wiper lip (30). Aspoiler (23) extends in the longitudinal
`direction of the support element, and for each retainer
`(36,38,40), the spoiler has a recess (46,48,50), Which
`extends crosswise to the longitudinal direction of the Wiper
`blade (10). The outer pro?le of the retainer is at least
`approximately adapted to the pro?le of the spoiler.
`
`10 Claims, 5 Drawing Sheets
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`Costco Exhibit 1009, p. 1
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`U.S. Patent
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`Feb. 25,2003
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`Sheet 1 0f 5
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`US 6,523,218 B1
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`23)? F '5 Fl‘ /
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`55 '
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`Costco Exhibit 1009, p. 2
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`U.S. Patent
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`Feb. 25,2003
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`Sheet 2 0f 5
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`US 6,523,218 B1
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`Costco Exhibit 1009, p. 3
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`U.S. Patent
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`Feb. 25, 2003
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`Sheet 3 0f 5
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`US 6,523,218 B1
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`L0
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`23
`32
`33
`59
`56
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`22/ _
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`Costco Exhibit 1009, p. 4
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`U.S. Patent
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`Feb. 25,2003
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`Sheet 4 0f 5
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`US 6,523,218 B1
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`Costco Exhibit 1009, p. 5
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`U.S. Patent
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`Feb. 25,2003
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`Sheet 5 0f 5
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`US 6,523,218 B1
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`Costco Exhibit 1009, p. 6
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`US 6,523,218 B1
`
`1
`WIPER BLADE FOR WINDOW PANES OF
`MOTOR VEHICLES
`
`BACKGROUND OF THE INVENTION
`In Wiper blades, the support element is intended to assure
`the most uniform possible distribution, over the entire ?eld
`sWept by the Wiper blade, of the contact pressure of the
`Wiper blade on the WindoW, Which pressure originates in the
`Wiper arm. Because of an appropriate curvature of the
`unstressed support element —that is, When the Wiper blade
`is not resting on the WindoW—the ends of the Wiper strip,
`Which in Wiper blade operation are placed fully against the
`WindoW, are urged by the then-tensed support element
`toWard the WindoW, even if the radii of curvature of spheri
`cally curved vehicle WindoWs differ in each Wiper blade
`position. Accordingly, the curvature of the Wiper blade has
`to be someWhat greater than the greatest curvature measured
`in the ?eld to be sWept of the WindoW to be Wiped. The
`support element thus replaces the complicated support
`bracket construction With tWo spring rails, disposed in the
`Wiper strip, as they are used in conventional Wiper blades
`(German patent disclosure DE-OS 15 05 357.)
`The invention is based on a Wiper blade as generically
`de?ned by the preamble to claim 1. In a knoWn Wiper blade
`of this type (DE 196 27 115.0 A1) must be provided With a
`separate Wind repelling strip, or spoiler, if the tendencies of
`the Wiper blade to lift aWay from the WindoW at relatively
`high travel speeds are to be averted. If this spoiler is to be
`disposed on the side of the support element remote from the
`WindoW, dif?culties can arise in replacing the used Wiper
`strip, at least Whenever this replacement is done by the end
`user of the Wiper blade. That is, this process requires not
`only the replacement of the Wiper strip but further installa
`tion Work With regard to the spoiler.
`
`SUMMARY OF THE INVENTION
`In the Wiper blade according to the invention, as de?ned
`by the characteristics of the body of claim 1, it is possible for
`this spoiler to be formed integrally and economically onto
`the Wiper strip; the recesses make an inconspicuous,
`problem-free placement of the retainers possible. Special
`installation steps for the spoiler are dispensed With. Because
`of the adaptation of the outer pro?le of the retainer to the
`pro?le of the spoiler, the spoiler remains operative over its
`full length, because no gaps that impair the contact pressure
`distribution remain. Even edges that occur at the recesses
`and can lead to an undesired reinforcement of the Wind noise
`occurring in the Wiper blade are covered by the retainers.
`For attaching the Wiper blade to a driven Wiper arm, the
`retainer is disposed in the longitudinal middle portion of the
`support element and is provided With means for attaching a
`Wiper arm of this kind.
`To avoid the risk of injury from the sharp-edged ends of
`the longitudinal rails When a person is manipulating the
`Wiper blade, at least one retainer is disposed on one end of
`the support element and is provided With means for covering
`the end edges of the longitudinal rails.
`In the case of especially long Wiper blades, it has proved
`advantageous if a further retainer is disposed betWeen the
`retainer disposed in the longitudinal center portion and the
`retainer disposed on the end of the support element, because
`this prevents a portion of a longitudinal rail from snapping
`out of its longitudinal groove, With the attendant loss of
`Wiping quality.
`Simple securing of the longitudinal rails in their longitu
`dinal grooves is attained if each retainer, With at least one kt,
`
`15
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`25
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`35
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`45
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`55
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`65
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`2
`clasps a respective one of the tWo longitudinal rails on its
`longitudinal edges.
`To lend the retainer the stability required during operation
`of the Wiper blade, the groovelike recess, in the spoiler is
`?lled by a body of the retainer, Which body has the exten
`sion.
`To achieve an attractive appearance of the Wiper blade, in
`terms of the length of the Wiper blade, the length of the
`retainer is adapted to the length of the groovelike recess.
`Since in the course of time the material comprising the
`Wiper strip and the spoiler integrally joined to it ages, Which
`is associated With a certain shrinkage, air gaps can arise
`betWeen the retainers and the end faces, toWard them, of the
`spoiler portions; these gaps can lead to the disadvantages
`already mentioned in terms of appearance and noise rein
`forcement. In a re?nement of the invention, this can be
`hindered by providing that the retainer is provided With a
`Wall, Which eXtends longitudinally of the Wiper blade and
`Which covers a peripheral region of the spoiler, adjacent to
`the recess, on the back Wall on the spoiler, remote from the
`leading-edge face.
`Another possible Way of overcoming the above disadvan
`tages is obtained if the body of the retainer, on its face end
`toWard the recess Wall of the spoiler, is provided With a
`recess, into Which the spoiler plunges With a respective end
`piece.
`EXpediently, the retainer is made from a plastic.
`Further advantageous re?nements and features of the
`invention are disclosed in the ensuing description of eXem
`plary embodiments, shoWn in the associated draWing.
`BRIEF DESCRIPTION OF THE DRAWINGS
`In the draWing:
`FIG. 1 is a side vieW of a ?rst embodiment of a Wiper
`blade embodied according to the invention and attached to
`a driven Wiper arm;
`FIGS. 2—4 each shoW a plan vieW on variously embodied
`Wiper blade support elements;
`FIG. 5 is an enlarged perspective vieW of approximately
`half of the Wiper blade of FIG. 1;
`FIG. 6 shoWs a cross section through the Wiper blade of
`FIG. 5 along the line VI—VI;
`FIG. 7 shoWs the arrangement of FIG. 5 after ageing of
`the Wiper strip and of the spoiler belonging to it;
`FIG. 8, in a vieW corresponding to FIG. 5, shoWs another
`embodiment of the Wiper blade of the invention;
`FIG. 9 is a perspective vieW of a retainer, belonging to the
`Wiper blade of FIG. 8 and embodied as a connection device;
`FIG. 10 is a perspective vieW of a retainer, embodied for
`covering the longitudinal rail end edges, for the Wiper blade
`of FIG. 8;
`FIG. 11 is a perspective vieW of a retainer, disposed
`betWeen the connection device and the end edges of the
`longitudinal rails, for the Wiper blade of FIG. 8;
`FIG. 12 is a vieW corresponding to FIG. 5 of a further
`embodiment of the Wiper blade of the invention;
`FIG. 13 is a perspective vieW of a retainer, embodied as
`a connection device and belonging to the Wiper blade of
`FIG. 12;
`FIG. 14 is a perspective vieW of a retainer, embodied for
`covering the end edges of the longitudinal rails, for the Wiper
`blade of FIG. 12; and
`FIG. 15 is a perspective vieW of a retainer, disposed
`betWeen the connection device and the end edges of the
`longitudinal rails, for the Wiper blade of FIG. 12.
`
`Costco Exhibit 1009, p. 7
`
`
`
`US 6,523,218 B1
`
`3
`DESCRIPTION OF THE EXEMPLARY
`EMBODIMENTS
`
`AWiper blade 10, shown in FIGS. 1, 5 and 6, for motor
`vehicle WindoWs has a multi-part elongated, spring-elastic
`support element 12, Which is shoWn separately in FIG. 2. On
`the top side 14 of the support element 12 pointing aWay from
`the WindoW—Whose surface to be Wiped is identi?ed by
`reference numeral 28—is a connection device 16, With the
`aid of Which the Wiper blade can be connected separably to
`a Wiper arm 18 guided along the body of a motor vehicle. An
`elongated, rubber-elastic Wiper strip 22 is disposed, parallel
`to the longitudinal axis of the support element 12, on the
`underside 20 of the support element 12 oriented toWard the
`WindoW. The free end 24 of the Wiper arm 18 is provided
`With means knoWn per se for separably connecting the Wiper
`blade to the Wiper arm. Corresponding counterpart connec
`tion means are provided on the connection device 16. The
`driven Wiper arm 18, Which can be moved betWeen turning
`points, is urged in the direction of the arroW 26 toWard the
`WindoW to be Wiped, Whose surface to be Wiped is repre
`sented in FIG. 1 by a dot-dashed line 28. Since the dot
`dashed line 28 is intended to represent the greatest curvature
`of the WindoW surface, it is clear that the curvature of the
`Wiper blade 10, resting With both ends on the WindoW but
`still unstressed, is greater than the maximum curvature of the
`WindoW. Under the contact pressure (arroW 26), the Wiper
`blade presses With its Wiper lip 30, over the entire length
`thereof, against the WindoW surface 28. In the process, a
`tension builds up in the bandlike, spring-elastic support
`element 12 that assures a proper contact of the Wiper strip
`22, or Wiper lip 30, over its entire length With the motor
`vehicle WindoW.
`As FIGS. 2 and 6 clearly shoW, in the Wiper blade of
`FIGS. 1, 5 and 6, the support element 12 is formed by tWo
`loose, spring-elastic longitudinal rails 32. HoWever, it is also
`conceivable either to join these tWo longitudinal spring rails
`132 to one another on one end via a crosspiece 133 (FIG. 3),
`or to dispose one crosspiece 233, 234 on each of the tWo
`ends of the longitudinal spring rails 232 (FIG. 4). With
`regard to the invention, the only signi?cant aspect here is
`that the support element 12 (FIG. 2) or 112 (FIG. 3) or the
`support element 212 of FIG. 4, made preferably from spring
`band steel has tWo spaced-apart longitudinal rails 32, 132,
`and 232, respectively, Which belong to the support element
`or form the support element (FIG. 2).
`The special feature of a ?rst embodiment of the Wiper
`blade of the invention Will noW be described in further detail
`in conjunction With FIGS. 5 and 6 of the draWing—Which
`essentially corresponds to the embodiment of FIG. 1. FIG.
`6 is particular shoWs that the tWo longitudinal rails 32
`belonging to the support element 12 rest in longitudinal
`grooves 34 of the Wiper strip 22, Which are located in a
`common plane located at a spacing distance from the surface
`to be Wiped of the Windshield 28. The longitudinal grooves
`34 and thus the longitudinal rails 32 received in them are
`spaced apart from one another. To prevent these longitudinal
`rails 32 from being able to shift transversely to their length
`out of their longitudinal grooves 34, they are secured by a
`plurality of retainers, of Which the ?rst retainer 36 is
`disposed in the longitudinal middle portion of the support
`element 12. Afurther, second retainer 38 is disposed on each
`of the tWo ends of the support element 12, and a third
`retainer 40 is provided in each case betWeen the ?rst retainer
`and each second retainer 38 (FIGS. 1 and 5). As FIGS. 5—7
`clearly shoW, the Wiper strip 22 extends via a longitudinal
`strut 42, located betWeen the longitudinal grooves 34, as far
`
`10
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`15
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`25
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`45
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`as the top side 14 of the support element 12 facing aWay
`from the WindoW 28. This longitudinal extension 23, Which
`extends longitudinally of the Wiper strip 22 and adjoins the
`longitudinal strut 42 is embodied as a spoiler; that is, its side
`that during Wiping operation is predominantly encountered
`by the relative Wind (arroW 25 in FIG. 6) is equipped With
`a leading-edge throat 44. For the retainers 36, 38 and 40, the
`Wiper strip 22, Which also includes the spoiler 23, is
`provided, on its side of the support element 12 remote from
`the Wiper lip 30, With recesses 46, 48, 50 oriented trans
`versely to the length of the Wiper strip 22; of these, the ?rst
`recess 46 is associated With the ?rst retainer 36, the second
`recess 48 With the second retainer 38, and the third recess 50
`With the third retainer 40. The retainers 36, 38 and 40 span
`
`the spacing Which
`the tWo outer longitudinal edges 33 of
`the tWo longitudinal spring rails 32 are spaced apart by one
`another. FIG. 6 shoWs this in particular in terms of a third
`retainer 40, shoWn in cross section. In the region of the
`spoiler 23, the retainers 36—40 have a cross section that
`substantially coincides With the cross section of the spoiler
`23. Each retainer is accordingly also provided With a
`leading-edge throat 44 against Which the relative Wind 25
`bloWs. Seen in cross section, accordingly, each retainer
`36—40 has a pro?le, in the region of the spoiler, that is at least
`approximately adapted to the pro?le of the spoiler. The
`pro?le is shaped in such a Way that the spoiler, and thus the
`retainers 36, 38 and 40 located in the recesses 46, 48 and 50,
`meet the need of the spoiler for improving the performance
`of the Wiper blade 10 in terms of lifting aWay from the
`WindoW, even at high travel speeds. Accordingly each
`retainer 36, 38, 40, With its body 41, forms a ?ller piece that
`?lls the recess 46, 48 and 50, respectively, associated With
`the respective retainer. As FIGS. 1 and 5 shoW in particular,
`the retainer 36 disposed in the longitudinal middle portion of
`the support element 12 is provided With means for attaching
`the Wiper arm 18. In the exemplary embodiment, these
`means are formed by a transverse bore 52, into Which a pivot
`bolt, for instance, can be placed, Which is then engaged by
`the Wiper arm With a counterpart pivot piece. The tWo
`retainers 40, each disposed on one of the ends of the support
`element 12, have a closing Wall 54, Which serves to cover the
`end edges 56 of the respective support elements 12, 112 and
`212. All the retainers 36, 38, 40, on the side of the retaining
`body 41 oriented toWard the support element 12, are pro
`vided With opposed securing claWs 58 (FIG. 6), each of
`Which clasps one of the tWo longitudinal rails 32, trans
`versely to their length, on their longitudinal edges 33 remote
`from one another. It is indispensable that in the exemplary
`embodiment, each of the longitudinal rails is also covered by
`a longitudinal band 59 of the Wiper strip 22 and of the
`longitudinal extension 23, respectively. The sole decisive
`factor is that the securing claWs 58 ?t over the outer
`longitudinal edges 33 of the spring rails 32 and secure them
`in their longitudinal grooves 34 of the Wiper strip 22.
`Furthermore, the securing claWs 58 also assure proper
`securing of each retainer 34, 36, 38 on the Wiper strip 22 and
`thus also assure reliable positioning of each retainer on the
`Wiper blade 10. In terms of the length of the Wiper blade 10,
`the length 60 of the retainer 36 and the length 62 of the
`retainer 40 are adapted to the length of the associated
`groovelike recesses 46 and 50, respectively.
`HoWever, it has been found that When certain materials or
`mixtures of materials are used to produce the Wiper strip 22
`and the spoiler 23 integrally joined to it, a certain shrinkage
`ensues in the course of the ageing process, especially in the
`longitudinal direction of the Wiper strip 22, and this can lead
`to the forming of gaps betWeen the spoiler portions formed
`
`Costco Exhibit 1009, p. 8
`
`
`
`US 6,523,218 B1
`
`6
`5
`longitudinal rails (32) of the support element (12) are
`by the recesses 46, 48, 50 and the retainer bodies 41. Such
`located, Which rails are secured in the grooves (34) by at
`a situation is shown in FIG. 7, taking as an example the
`exemplary embodiment of the invention shoWn in FIG. 5.
`least one retainer (36, 38, 40) that spans a spacing betWeen
`sides of the support element (12) remote from the Wiper lip
`The gaps betWeen the spoiler portions and the retainer
`(30), characteriZed in that the Wiper blade (10), on the side
`bodies 41 are identi?ed by reference numeral 68. Aside from
`of the support element (12) opposite the Wiper lip (30), is
`the unattractive appearance of such a Wiper blade, these gaps
`provided With a spoiler (23) having an outer pro?le, extend
`68 lead to considerable undesired noise of the Wiper blade,
`Which is highly irritating, especially at relatively high travel
`ing in the longitudinal direction of the support element, and
`speeds.
`for each retainer (34, 36, 38), the spoiler has a recess (46, 48,
`and 50, respectively) receiving said at least one retainer,
`In order to cover these gaps 68, the body of the retainer
`Which recess, extends crossWise to the longitudinal direction
`136—in an exemplary embodiment of the invention shoWn
`of the Wiper blade (10), and in transverse cross section, an
`in FIGS. 8—11—is provided on its face end toWard the recess
`outer pro?le of the at least one retainer located in the region
`Wall of the spoiler With a recess 137 (FIG. 9), into Which the
`of the spoiler (23) is at least approximately adapted to the
`spoiler 23 plunges With an end piece 141 (FIG. 8). A
`outer pro?le of the spoiler.
`corresponding arrangement is provided on the second
`15
`2. The Wiper blade of claim 1, characteriZed in that the at
`retainer 138 as Well, Which is disposed on the ends of the
`least one retainer (36, 136, 236, respectively) is disposed in
`Wiper strip 22 or of the support element 12. The recess
`a longitudinal center portion of the support element (12) and
`corresponding to the recess 137 is identi?ed by reference
`is provided With means (52) for attaching a driven Wiper arm
`numeral 139 in FIG. 10. FIG. 8 also illustrates the plunging
`(18).
`of the end piece 142 into the recess 139. In this embodiment,
`3. The Wiper blade of claim 2, characteriZed in that an
`the third retainer 140 is embodied in bandlike form. It Wraps
`additional retainer (38) is disposed on one end of the support
`around the unsplit spoiler that extends betWeen the tWo
`element (12) and is provided With means (54) for covering
`retainers 136 and 138. FIGS. 9—11 also shoW the securing
`end edges (56) of the longitudinal rails (32).
`claWs 58, already mentioned, Which clasp the tWo longitu
`4. The Wiper blade of claim 3, characteriZed in that a
`25
`dinal rails 32 on their outer longitudinal edges 33. A further embodiment, shoWn in FIGS. 12—15, shoWs
`further retainer (40) is disposed betWeen the retainer (36)
`disposed in the longitudinal center portion and the additional
`another possible Way of covering the gaps 68, Which is
`retainer (38) disposed on the end of the support element
`employed betWeen the facing end faces of the ?rst retainer
`(12).
`236 and With the corresponding faces of the second retainer
`5. The Wiper blade of claim 1, characteriZed in that each
`238 and the spoiler, or the facing end faces of the third
`retainer (36, 38, and 40, respectively), With at least one claW
`retainer 240 and the end faces, toWard it, of the spoiler 23.
`(58), clasps a respective one of the tWo longitudinal rails
`To that end, the back Walls 45, located on the back side of
`(32) on a longitudinal edges (33).
`the leading-edge throat 44, of the respective retainers 236,
`6. The Wiper blade of claim 5, characteriZed in that the at
`
`238, 240 are provided, on their peripheral regions adjacent to the respective recesses 46, 48, and 58 (FIG. 1), With a
`least one recess (46, 48, 50, respectively), in the spoiler (23),
`is groove-shaped and is ?lled by a body (41) of the at least
`back Wall 242 Which extends far enough in the longitudinal
`one retainer.
`direction of the Wiper blade that a reliable covering of the
`7. The Wiper blade of claim 6, characteriZed in that in
`gaps 68 is assured in every operating position of the Wiper
`terms of the length of the Wiper blade (10), a length of the
`blade 10.
`at least one retainer (60 W and 62) is adapted to a length of
`It is a common feature of all the exemplary embodiments
`the groove-shaped recess (46 and 50, respectively).
`that the Wiper blade 10, on the top side of the support
`8. The Wiper blade of claim 7, characteriZed in that the at
`element 12 opposite the Wiper lip 30, is provided With a
`least one retainer (236, 238, 240) is provided With a Wall
`spoiler 23, extending in the longitudinal direction of the
`(242), Which extends longitudinally of the Wiper blade (10)
`support element, and this spoiler has one recess 46, 48 and
`and Which covers a peripheral region of the spoiler (23),
`50 for each respective retainer 36, 38, and 40, the retainers
`adjacent to the recess, on a back Wall on the spoiler, remote
`
`preferably being made of a plastic, Which extends crossWise to the longitudinal direction of the Wiper blade 10, and When
`from a leading-edge face (44).
`9. The Wiper blade of claim 8, characteriZed in that the
`body (41) of the at least one retainer (136 and 138), on its
`face end toWard a recess Wall of the spoiler (23), is provided
`With a recess (137 and 139, respectively), into Which the
`spoiler (23) plunges With a respective end piece (141 and
`142).
`10. The Wiper blade of claim 1, characteriZed in that the
`at least one retainer (36, 38, 40; 136, 138, 140; 236, 238,
`240) is made from a plastic.
`
`45
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`seen in cross section, the outer pro?le of the respective
`retainer, located in the region of the spoiler 23, is at least
`approximately adapted to the pro?le of the spoiler.
`What is claimed is:
`1. An elongated Wiper blade (10) for WindoWs of motor
`vehicles, having an elastic, elongated support element for an
`elongated Wiper strip (22), Which strip comprises a ?exible
`material and can be placed against the WindoW (28) to be
`Wiped With a Wiper lip (30) and Which on its long sides has
`opposed longitudinal grooves (34), in Which spaced-apart
`
`55
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`Costco Exhibit 1009, p. 9