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`Costco Exhibit 1007, p. 1
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`CWC0002120
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`Costco Exhibit 1007, p. 2
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`CWC0002121
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`Costco Exhibit 1007, p. 3
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`CWC0002122
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`Costco Exhibit 1007, p. 4
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`CWC0002123
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`Costco Exhibit 1007, p. 5
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`CWC0002124
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`Costco Exhibit 1007, p. 6
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`CWC0002125
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`Costco Exhibit 1007, p. 7
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`CWC0002126
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`Costco Exhibit 1007, p. 8
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`CWC0002127
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`Costco Exhibit 1007, p. 9
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`CWC0002128
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`Costco Exhibit 1007, p. 10
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`CWC0002129
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`Costco Exhibit 1007, p. 11
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`CWC0002130
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`Costco Exhibit 1007, p. 12
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`CWC0002131
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`Costco Exhibit 1007, p. 13
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`CWC0002132
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`Costco Exhibit 1007, p. 14
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`CWC0002133
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`Costco Exhibit 1007, p. 15
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`CWC0002134
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`Costco Exhibit 1007, p. 16
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`CWC0002135
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`Costco Exhibit 1007, p. 17
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`CWC0002136
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`Costco Exhibit 1007, p. 18
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`Costco Exhibit 1007, p. 19
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`PCT
`
`WORLD INTELLECTUAL PROPERTY ORGANIZATION
`International office
`
`INTERNATIONAL PATENT APPLICATION PURSUANT TO THE
`INTERNATIONAL PATENT COOPERATION TREATY (PCT)
`
`(51) International Patent Classification 6 :
` B60S 1/38
`
`
`A1
`
`(11) International Publication Number: WO 99/12784
`
`(43) International
` publication date: March 18, 1999 (03/18/1999)
`
`(21) International Document Identifier: PCT/DE98/02074
`
`(22) International Filing Date: July 23, 1998 (07/23/1998)
`
`(81) Designated States: BR, JP, KR, US, European patent
`(AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE,
`IT, LU, MC, NL, PT, SE).
`
`
`
`(30) Priority Data:
`
`197 39 256.3 September 8, 1997 (09/08/1997) DE
`
`
`
`(71) Applicant (for designated states excluding the US):
`ROBERT BOSCH GMBH [DE/DE]; Postfach 30 02 20, D-
`70442 Stuttgart (DE).
`
`Published:
`With international search report.
`Prior to expiration of the deadline allowed for
`amendments to claims; publication will be repeated
`if amendments are made.
`
`
`
`
`(72) Inventor; and
`
`(75) Inventor/Applicant (only for US): MERKEL, Wilfried
`[DE/DE]; Westring 10a, D-77876 Kappelrodeck (DE).
`KOTLARSKI, Thomas [DE/DE]; Hauptstrasse 58a, D-
`77830 Buehlertal (DE).
`
`CWCART0002119
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`Costco Exhibit 1007, p. 20
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`ONLY FOR INFORMATION PURPOSES
`
`Codes to identify PCT contracting states in the headers of documents which disclose international applications
`pursuant to the PCT.
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`
`
`
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`AL Albania
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`AM Armenia
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`AT Austria
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`AU Australia
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`ES Spain
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`FI Finland
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`FR France
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`GA Gabon
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`AZ Azerbaijan
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`GB United Kingdom
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`BA Bosnia and Herzegovina
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`GE Georgia
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`BB Barbados
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`BE Belgium
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`BF Burkina Faso
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`BG Bulgaria
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`BJ Benin
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`BR Brazil
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`BY Belarus
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`CA Canada
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`GH Ghana
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`GN Guinea
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`GR Greece
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`HU Hungary
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`IE Ireland
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`IL Israel
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`IS Iceland
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`IT Italy
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`CF Central African Republic
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`JP Japan
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`KE Kenya
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`KG Kyrgyzstan
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`CG Congo
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`CH Switzerland
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`CI Côte d’Ivoire
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`CM Cameroon
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`CN China
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`CU Cuba
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`CZ Czech Republic
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`DE Germany
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`DK Denmark
`EE Estonia
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`
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`KP Democratic People’s Republic of
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`NZ New Zealand
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`Korea
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`KR Republic of Korea
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`KZ Kazakhstan
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`LC Saint Lucia
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`LI Liechtenstein
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`LK Sri Lanka
`LR Liberia
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`PL Poland
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`PT Portugal
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`RO Romania
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`RU Russian Federation
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`SD Sudan
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`SE Sweden
`SG Singapore
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`LS Lesotho
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`LT Lithuania
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`LU Luxembourg
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`LV Latvia
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`MC Monaco
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`MD Republic of Moldova
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`MG Madagascar
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`SI Slovenia
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`SK Slovakia
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`SN Senegal
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`SZ Swaziland
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`TD Chad
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`TG Togo
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`TJ Tajikistan
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`MK The former Yugoslav Republic
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`TM Turkmenistan
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`of Macedonia
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`ML Mali
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`MN Mongolia
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`MR Mauritania
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`MW Malawi
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`MX Mexico
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`NE Niger
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`NL Netherlands
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`NO Norway
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`TR Turkey
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`TT Trinidad and Tobago
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`UA Ukraine
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`UG Uganda
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`US United States of
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`America
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`UZ Uzbekistan
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`VN Vietnam
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`YU Yugoslavia
`ZW Zimbabwe
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`CWCART0002120
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`Costco Exhibit 1007, p. 21
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`WO 99/12784
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`
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`-1-
`
`PCT/DE98/02074
`
`
`
`Wiper blade for cleaning windows of motor vehicles
`
`
`
`Prior art
`
`
`
`In wiper blades of the type indicated in the preamble to claim 1, the support element is meant
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`to assure the most even possible distribution of the wiper blade contact pressure, the same
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`applied via the wiper arm, on the windows, over the entire wiping field swept by the wiper
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`blade. By means of a suitable curvature of the unstressed support element – that is, when the
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`wiper blade is not in contact against the window – the ends of the wiper strip, which in wiper
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`blade operation are pressed entirely against the window, are loaded by the then-stressed
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`support element against the window, even if the radii of curvature of spherically curved
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`vehicle windows differ in every position of the wiper blade. The curvature of the wiper blade
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`must accordingly be somewhat greater than the greatest curvature of the wiping field of the
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`window to be wiped. The support element thus replaces the complicated support bracket
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`construction with two spring rails arranged in the wiper strip, as used in conventional wiper
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`blades (DE-OS 15 05 379).
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`
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`The invention proceeds from a wiper blade as generically defined by the preamble to claim 1.
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`In a known wiper blade of this type (DE-PS 10 28 896), it is possible for a developing
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`pressure to seize the wiper blade from below on the front side thereof facing into the wind.
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`On the other
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`CWCART0002121
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`Costco Exhibit 1007, p. 22
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`WO 99/12784
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`-2-
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`PCT/DE98/02074
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`hand, on the back side facing away from the wind, a considerable negative pressure builds up.
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`Although the wiper blade, which during operation usually executes a pendulum motion,
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`constantly changes its position relative to the oncoming wind, one of its long sides is always
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`more or less greatly exposed to the wind and is therefore called the front side, while its other
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`long side is accordingly also thought of as the back side. At relatively high vehicle speeds,
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`given the cooperation of these two aforementioned pressures, both of which are oriented
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`counter to the wiper blade contact pressure, this contact pressure is reduced at least enough
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`that proper wiping is no longer possible. Increasing the wiper blade contact pressure against
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`the window at high vehicle speeds could admittedly reduce the severity of this problem, but
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`at lower vehicle speeds, when the liftoff tendency is less, the friction between the wiper blade
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`and the window increases; this leads to undesirable noise buildup and to excessively high
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`stress on the drive components and on the rubber of the wiper. To suppress the
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`aforementioned tendencies of the wiper blade to lift off from the window, the accessories
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`trade offers so-called spoilers, which can be arranged on the wiper blade and support bracket
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`system. With the wiper blade in question, however, this cannot be done, because fastening
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`what is as a rule a rigid spoiler to the support element would essentially undo the flexibility
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`of the support element, which would render proper cleaning of the prescribed wiping field no
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`longer possible.
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`
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`Advantages of the invention
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`
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`In the wiper blade with the characterizing features of claim 1, via the leading-edge face of the
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`wind deflector strip that faces into the wind, a force component aimed at the window is built
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`up which counteracts the liftoff tendency of the two pressures and thus assures excellent
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`CWCART0002122
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`Costco Exhibit 1007, p. 23
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`WO 99/12784
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`-3-
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`PCT/DE98/02074
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`cleaning quality, at least in the region of the wiping field swept by the wiper blade – that is,
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`the region that is important to the vehicle’s driver. Depending on the size of the leading-edge
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`face, this “auxiliary contact pressure” can be adapted to the variable demands that depend for
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`instance on the type of vehicle. It is also advantageous in the solution according to the
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`invention that as a function of the vehicle speed, the contact pressure rises or falls with this
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`speed. Thus a suitably high “auxiliary contact pressure” is opposed only to the liftoff
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`tendency that occurs at high speed. At the same time, the longitudinal edges of the spring
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`rails that protrude from the longitudinal grooves of the wiper strip offer an excellent
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`capability of positioning and fastening the connection device.
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`
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`If along its length the wind deflector strip has at least one recess extending nearly to the
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`longitudinal grooves, which serves to receive retaining means for the two spring rails, said
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`retaining means being arranged transverse to the length, then the retaining means can become
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`operative near their retention/attachment points, thus making undesirable leverage effects
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`avoidable.
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`
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`The part of the wiper strip designed as a wind deflector strip expediently has a substantially
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`triangular cross section, the side of which facing predominantly into the wind is scooped out
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`in concave fashion, and the second side of the wind deflector strip is oriented substantially
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`perpendicular to the window, and the third side, to form a wind deflector strip of compact
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`design, forms the one groove wall which faces away from the window, for the spring rails.
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`CWCART0002123
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`Costco Exhibit 1007, p. 24
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`WO 99/12784
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`-4-
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`PCT/DE98/02074
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`Advantages from a manufacturing standpoint can be obtained if the wiper strip has a constant
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`cross section substantially over its entire length.
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`
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`To stabilize the wiper blade, the spring rails that belong to the support element can be
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`engaged by a plurality of retaining means distributed over the length of the spring rails.
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`
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`In this respect, further advantages from the standpoint of mounting and assembly are obtained
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`if the connection device is designed as a retaining means.
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`
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`An especially simple form of the further retaining means is obtained if these retaining means
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`are designed as clamps which with claws on their ends reach around the spring rails on the
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`longitudinal edges facing away from one another.
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`
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`On the two ends of the wiper blade, mounting the retaining means is made simple if the
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`spring rails have their end portions exposed, and also if clamp-like retaining means engage
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`these end portions.
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`
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`Further advantageous implementations and features of the invention are given in the
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`following description of embodiments shown in the accompanying drawings.
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`
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`Drawings
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`
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`In the drawing, Figure 1 shows a side view of a wiper blade according to the invention,
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`Figure 2 shows a top view, not to scale, of a support element belonging to the wiper blade, in
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`which a wind deflector strip of the wiper blade is shown by dashed lines, Figure 3 shows an
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`CWCART0002124
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`Costco Exhibit 1007, p. 25
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`WO 99/12784
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`-5-
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`PCT/DE98/02074
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`enlarged cross-section of the wiper blade, taken along the line III-III in Figure 1, Figure 4
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`shows an enlarged wiping area of the wiper blade along the line IV-IV in Figure 1, with the
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`connection device for the wiper arm shown in dashed lines, and Figure 5 shows an enlarged
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`view of the support element in the direction of the arrow V in Figure 2, rotated by 90°.
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`
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`Description of the embodiment
`
` A
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` wiper blade 10 shown in Figure 1 has a multi-part, elongated, spring-elastic support
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`element 12 (Figure 2), on the underside of which is attached an elongated, rubber-elastic
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`wiper strip 14 axially parallel to it. A connection device 16 is arranged on the top side of the
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`support element 12, and with its aid the wiper blade 10 can be detachably connected to a
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`driven wiper arm 18 connected to the body of a motor vehicle. A hook acting as a counterpart
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`connection means is molded onto the free end 20 of the wiper arm 18 and grasps a pivot
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`pin 22 that belongs to the connection device 16 of the wiper blade. The attachment between
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`the wiper arm 18 and the wiper blade 10 is performed by securing means not shown in further
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`detail but known per se and designed as adapters. The wiper arm 18 and thus also the hook on
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`the end of the arm 20 is stressed in the direction of the arrow 24 against the window to be
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`wiped, the wiping surface of which is indicated in Figure 1 by a dashed line 26. Since the
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`dashed line 26 is meant to represent the greatest curvature of the window surface, it is quite
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`apparent that the curvature of the wiper blade, which rests with its two ends on the window,
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`is greater than the maximum curvature of the window. Under the contact pressure (arrow 24),
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`the wiper blade presses with its wiper lip 28 over its entire length against the window surface.
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`This causes a tension to build up in the band-like, spring-elastic support element 12, and
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`CWCART0002125
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`Costco Exhibit 1007, p. 26
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`WO 99/12784
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`-6-
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`PCT/DE98/02074
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`this tension assures a proper contact of the wiper strip 14 and/or wiper lip 18, over their entire
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`length, with the motor vehicle window.
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`
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`It can be seen from Figure 2 that the support element 12, seen there in top view, comprises a
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`plurality of individual parts. For instance, it has two spring rails 30 and 32, which in the
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`embodiment are joined together by clamp-like or claw-like retaining means 34 and 36 placed
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`on both ends of the spring rails located adjacent one another. As Figures 3 and 4 particularly
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`show, each of the two spring rails 30 and 32 is located in a respective longitudinal
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`groove 38 and 40 assigned to it in the wiper strip 14; the grooves are arranged in the same
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`plane and are thus opposite one another. Figure 2 also shows that both spring
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`rails 30 and 32 are wider in their middle region than in their end regions, because the two
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`outer longitudinal edges 42, 44, facing away from one another, extend accordingly. The two
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`inner longitudinal edges 46, 48 facing toward one another, are oriented parallel to one another,
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`however. These inner longitudinal edges 46 and 48 rest on the bottom of the both respective
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`longitudinal grooves 38 and 40. Since in the embodiment the depth of the grooves is
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`approximately equal to the width of the spring rails 30 and 32 in their end regions, toward the
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`middle portion the two spring rails protrude increasingly far out of the longitudinal
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`grooves 38 and 40 with their outer longitudinal edges 42 and 44 (see Figures 2, 3, and 4).
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`
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`Figures 3 and 4 also show that the wiper strip 14 extends with a constriction 50, dictated by
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`the longitudinal grooves 38 and 40, through the slot 52 (Figure 2) that remains between the
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`two inner longitudinal edges 46 and 48, and after that the wiper strip widens again on the side
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`of the support element 12 facing away from the window and is constructed with a
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`CWCART0002126
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`Costco Exhibit 1007, p. 27
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`WO 99/12784
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`-7-
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`PCT/DE98/02074
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`substantially triangular cross section, which serves as a wind deflector strip. The one lateral
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`face 56 of the wind deflector strip facing predominantly into the wind (arrow 55 in Figure 3)
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`is scooped out in concave fashion. The second lateral face 58 of the wind deflector strip is
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`oriented essentially perpendicular to the window 26, and the third lateral face 60 of the wind
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`deflector strip forms the wall, pointing away from the window, of the two longitudinal
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`grooves 38 and 40. As can be seen from the dashed line in Figure 2, the wiper strip 14 and the
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`wind deflector strip 54 integrated with it have a constant cross section in this embodiment.
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`Nevertheless, it is also conceivable for at least the cross section of the wind deflector
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`strip 54 to be varied over its length. The constant cross section over the length of the wind
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`deflector strip 54 in the embodiment does not, however, preclude its being interrupted – as
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`can be seen in Figure 1 – in the middle region of the wiper blade 10 by a recess 62, which
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`extends nearly to the support element 12. The connection device 16 for the wiper arm 18 is
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`arranged in this recess 62. With pairs of legs 64 and 66, the connection device 16 fits over
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`and under the spring rails 30 and 32 and keeps them in their prescribed position in the
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`longitudinal grooves 38 and 40. The legs 64 and 66 are located on cheeks 68 and 70 of the
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`connection device 16, which are joined together by the pivot pins 22 already mentioned. The
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`connection device 16 thus forms a retaining means for the two spring rails 30 and 32.
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`
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`However, so that the spring rails 30 and 32 will remain with their end regions properly within
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`the longitudinal grooves 38 and 40, further retaining means designed as clamps 72 are
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`included, which with claws 74 on their ends (see Figure 5) reach around the spring rails at
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`their longitudinal edges 42 and 44 facing away from one another. Figures 1 and 2 show that
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`CWCART0002127
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`Costco Exhibit 1007, p. 28
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`WO 99/12784
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`-8-
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`PCT/DE98/02074
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`the spring rails 30 and 32 emerge with their end portions from the longitudinal
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`grooves 38 and 40, because the wind deflector strip is slightly shorter than the support
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`element 12, and thus the clamps 74 can engage the end portions of the support element. If the
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`wiper blades are long enough, then it may be expedient to arrange additional claw-like
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`retaining means distributed along the length of the wiper blade; in that case, a recess must
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`then be functionally assigned to them, to allow these clamps to pass through the wind
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`deflector strip 54.
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`
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`It is clear from the above that besides the two spring rails 30 and 32, the support
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`element 12 also includes retaining means, which ensure the securing of the support element
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`to the wiper strip 14. The connection device 16, however, is intended primarily to make an
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`articulated connection possible between the wiper arm 18 and the wiper blade 10. The
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`connection device 16 furthermore has an additional function, as already described, namely to
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`secure the spring rails 30 and 32 in their middle region.
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`
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`In view of the various tasks to be taken on by the wiper lip 28 or the wind deflector strip 54,
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`the wiper strip 14 can be made for instance by means of what is known as multicomponent
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`extrusion.
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`
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`Instead of the separate retaining means 34 and 36 at the ends of the spring rails 30 and 32, it
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`is also conceivable to design these retaining means as transverse legs, joined integrally to one
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`or both spring rails and extending to the other spring rail; their free ends, bent into claws,
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`then reach around this other spring rail. Other forms of fastening, however, are also possible
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`– such as adhesive bonding, welding, and so forth.
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`CWCART0002128
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`Costco Exhibit 1007, p. 29
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`-9-
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`PCT/DE98/02074
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`WO 99/12784
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`Claims
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`
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`1. A wiper blade (10) for cleaning windows of motor vehicles, having an elongated, rubber-
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`elastic wiper strip (14) which can be placed against the window, which is configured on its
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`two long sides with longitudinal grooves (38, 40) which are opposite each other, wherein one
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`spring rail (30, 32), protruding intermittently from the grooves by one longitudinal edge
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`(42, 44), is arranged in each of said longitudinal grooves [(38, 40)], and the spring rails
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`belong to an elongated, spring-elastic support element (12) for the wiper strip (14), on the
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`middle portion of which a connection device (16) for a wiper arm (18) guided on the vehicle
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`body is arranged, characterized in that at least one longitudinal portion of the part of the
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`wiper strip located on the side of the spring rails (30, 32) facing away from the window is
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`designed as a wind deflector strip (54), and that the connection device (16) is retained on the
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`longitudinal edges (42, 44) of the spring rails (30, 32) that protrude from the longitudinal
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`grooves (38, 40).
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`
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`2. A wiper blade according to claim 1, characterized in that the wind deflector strip (54) has
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`at least one recess (62) which extends along its length nearly to the longitudinal grooves
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`(38, 40), and which serves to receive retaining means arranged crosswise to the length, for the
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`two spring rails.
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`
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`3. A wiper blade according to claim 1 or 2, characterized in that the part of the wiper strip (14)
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`designed as a wind deflector strip (54) has a substantially triangular cross section, the side (56)
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`CWCART0002129
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`Costco Exhibit 1007, p. 30
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`WO 99/12784
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`-10-
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`PCT/DE98/02074
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`of which facing predominantly into the wind (arrow 55) is scooped out in a concave fashion.
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`
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`4. A wiper blade according to claim 3, characterized in that the second side (58) of the wind
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`deflector strip (54) is oriented substantially perpendicular to the window, and that its third
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`side (60) forms the one groove wall facing away from the window.
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`5. A wiper blade according to one of the claims 1 to 4, characterized in that the wiper strip
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`(14) has a constant cross section over substantially its entire length.
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`
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`6. A wiper blade according to one of the claims 2 to 5, characterized in that the spring rails
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`(30, 32) that belong to the support element (12) are engaged by a plurality of retaining means
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`(34, 36) distributed over the length of the spring rails [(30, 32)].
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`
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`7. A wiper blade according to one of the claims 2 to 6, characterized in that the connection
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`device (16) is designed as a retaining means for the two spring rails (30, 32).
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`
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`8. A wiper blade according to claim 6, characterized in that the further retaining means
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`(34, 36) are designed as clamps (72), which with claws (74) on their ends reach around the
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`spring rails (30, 32), on the longitudinal edges (42, 44) thereof facing away from one another.
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`
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`9. A wiper blade according to one of the claims 1 to 8, characterized in that the spring rails
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`(32) have their end portions exposed, and that clamp-like retaining means (34, 36) engage on
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`these end portions.
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`CWCART0002130
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`Costco Exhibit 1007, p. 31
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`Costco Exhibit 1007, p. 32
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`Costco Exhibit 1007, p. 33
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`Costco Exhibit 1007, p. 34
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`Costco Exhibit 1007, p. 35