Costco Exhibit 1004, p. 1
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`Costco Exhibit 1004, p. 2
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`Costco Exhibit 1004, p. 3
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`Costco Exhibit 1004, p. 4
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`1
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`Federal Republic of Germany
`German [emblem] Patent Office
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`Patent publication 1 028 896
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`Cl. 63 c 82
`Internat. Cl. B 62 d
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`A 20581 M / 63 c
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`Filing date: June 24, 1954
`Publication of the application and issue
`of the patent publication: April 24, 1958
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`Wiper bar for windshield wipers
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`Applicant:
`AVOG
`Elektro- und Feinmechanik G.m.b.H.
`Bühlertal (Bad.), Klotzbergstr. 1
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`Alfred Hoyler, Bühlertal (Bad.)
`has been named as the inventor
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` 2
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`The weight of the moving parts can be largely reduced thereby
`so that the stress upon the drive elements is low. Accordingly
`here less wear and tear occurs after identical running time. The
`low weight also meets the demand for increasing wiper speeds.
`For the use in wiper bars on curved windshields additionally
`spring elements must be provided, which are adjustable under
`certain circumstances and allow a good adjustment to the
`respective curvature of the glass.
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`The invention shall be explained in greater detail using some
`exemplary embodiments shown in the drawing. It shows:
`Fig. 1
`the side view and top view of a wiper bar with its
`cross-sections A-A, B-B, and C-C.
`Figs. 2 to 4 the side views and cross-sections of various
`embodiments of wiper bars with adjustable pressure springs.
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`In Fig. 1 1 represents the rubber blade, with its profile
`generally being discernible from the cross-section C-C. A
`strong back part 2 is connected via a strip 3 with the actual
`wiper lip 4. The longitudinal springs 5 are inserted in lateral
`slots, held together at the ends of the bar by the clamps 6. The
`hump 7 is fastened in the center of the rubber blade, which is
`either impressed in a mold in one piece with the rubber blade
`when the blade is produced in the injection-molding method,
`or if the blade is produced in the injection molding process it is
`adhered thereto by vulcanization or adhesion. The hump is
`provided with expansions 8 to achieve higher lateral stiffness
`as well as an opening through which the central clamp 9 is
`inserted.
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`The invention relates to a wiper bar for windshield wipers,
`comprising a graduated profile bar with elastic metal strips,
`with their broad side facing the level of the glass and inserted
`into lateral slots of the arm.
`In wiper bars of conventional design a rubber strip is held by a
`metal bar, which via a hump, also comprising metal, is
`supported in an articulate fashion in an accept fastened at the
`wiper arm. For wiper bars operating with arced windshields
`additionally a brace is fastened like a lever bar, which shifts
`the compression applied by the wiper arm to the ends of the
`bar in order to adjust the wiper edge of the rubber blade to the
`various curvatures of the windshields. Such apparatuses
`comprising multiple parts develop noise during operation,
`particularly at the inversion points of the wiping motion.
`Accordingly,
`sometimes
`springs or
`interim bearings
`comprising elastic, noise-damping materials are provided
`between the fastening hump, and its accept at the wiper arm, or
`instead of metal pins or rivets here parts are used made from
`rubber or plastic. It has also been attempted to produce the bar
`entirely from rubber, usually as a hollow profiled part with an
`inserted metal bar or a fastening part connected thereto.
`Almost all of
`the above-mentioned embodiments show
`shortcomings. The elastic inserts for noise reduction are
`ground over time by wear and tear, in winter the joints lock up
`by icing, and the metal parts become unsightly due to
`weathering. In one wiper bar of prior art, in which the
`fastening for the wiper arm engages a rear projection of the
`wiper bar extending over the entire length of the bar, the wiper
`blade is reinforced by a flat spring, integrated in the rubber part
`of the wiper bar and arranged with its wider area perpendicular
`to the wiped surface, which however disadvantageously
`prevents that the wiper blade is flexible in reference to the
`wiped area. This way the adaptation of the wiper lip to the
`surface of curved windshields is impossible.
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`The disadvantages of the wiper bars of prior art are avoided
`according to the invention, if the wiper bar of the type
`mentioned at the outset comprises a profile bar at the back
`produced
`from
`rubber or elastic plastic, and shows
`approximately in the longitudinal center a reinforcement
`produced in one piece with it or being adhered thereto for an
`insertion and latching fastening at the wiper arm.
`In particular in wiper bars according to the invention metal
`joints and metal parts can be avoided.
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`Costco Exhibit 1004, p. 5
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`3
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`Additionally the hump includes an eyelet-like opening 10,
`which serves for the suspension at the wiper arm not shown.
`Here the edges of the eyelet may be reinforced by an injection-
`molded metal edge 11.
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`Such a bar can be cut in the stretched form in a conventional
`manner at the wiper edge, then the springs 5 are inserted into
`the slots and clamped. When used on a planar windshield,
`stretched springs are inserted, in case of curved glass springs
`preliminarily bent according to the curvature of the windshield.
`In order to achieve a good contact in the latter case, the
`embodiments according to Figs. 2 to 4 are suggested. The
`reference characters and the general design are consistent with
`those of Fig. 1. For a better distribution of the compression
`second and third springs 12, 13 are suggested in Fig. 2. In Fig.
`3 the second spring 12 is bent at its ends, and the pressure
`acting at this finger is then changed by displacing the clamp 14
`and thus the curvature of the wiper bar can be adjusted. A
`similar arrangement is finally shown in Fig. 4, however here
`the spring 12 itself is displaceable via the clamp 15, the clamp
`14 in turn serves for adjusting the compression of the spring
`12. In this arrangement it is furthermore shown that the rubber
`blade is adhered or vulcanized to the longitudinal spring 5,
`allowing a particularly light and narrow embodiment of the
`wiper bar.
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`The hump for the fastening at the wiper arm is adhered at the
`opposite side of the spring 5. An appropriate embodiment is
`also possible for the wiper bars according to Figs. 1 to 3.
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`4
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`Claims
`A wiper bar for windshield wipers, comprising a
`1.
`graduated profiled bar with elastic metal strips, with their
`broad side facing the level of the glass and inserted into lateral
`slots of the bar, characterized in that the back of the profile bar
`(1) produced from rubber or elastic plastic, comprises
`approximately
`in
`the
`longitudinal center an arched
`reinforcement (7), produced in one piece therewith or adhered
`thereto, which can be fastened by insertion and latching at the
`hump-like reinforcement (7) serving as the wiper arm.
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`A wiper bar according to claim 1, characterized in
`2.
`that the lateral metal strips (5) are held in their position by
`clamps (6, 9) in a manner known per se.
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`to claims 1 and 2,
`A wiper bar according
`3.
`characterized in that the additional pressure springs (12, 13)
`known per se are fastened with their center or with one end
`using clamps (15) at the elastic metal inserts, while the free
`ends being curved like fingers and with it being possible that
`their pressure against the profile bar can be adjusted by
`different clamps (14).
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`A wiper bar according to claim 3, characterized in
`4.
`that the pressure springs (12, 13) are longitudinally adjustable.
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`Publications considered:
`French patent publications No. 854 122, 956 796, 023 442;
`U.S.A. patent publication No. 2 537 411.
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`Here 1 page of drawings
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`Costco Exhibit 1004, p. 6
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`Drawings page 1
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`Issue date, April 24, 1958
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`DAS 1 028 896
`82
`Cl. 63 c
`Internat. Cl. B 62 d
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` Cross-section A-A Cross-section C-C
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` Cross-section B-B
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`Costco Exhibit 1004, p. 7