US3882567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wiper blade element
Assignee: Feldmuehle Anlagen und Produktion GmbH
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Filing: 1972-06-12
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Granted: 1975-05-13
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Expires: 1992-06-12
Abstract
Abstract A wiper blade element for a windshield wiper consists of a unitary strip of synthetic or preferably natural rubber and of a coating of elastomeric polyurethane plastic covering the hinge portion of the element which connects the body portion, normally attached to a wiper arm, and the blade portion whose lip part slides over the windshield when in service. The plastic coating retards aging of the hinge part, a primary cause of malfunctioning of the wiper, and further improvement is provided by also coating the lip part except for its edge face.
Inventors
- 👤 Rudolf Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:21
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/32; B60S1/38; B60S2001/3827; B60S2001/3836
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
An elongated windshield wiper element essentially consisting of a. a unitary rubber strip having a body portion, a blade portion, and a hinge portion of reduced cross section integrally connecting said blade portion to said body portion, said blade portion having a base part contiguously adjacent said hinge portion and tapering from said base part in a direction away from said hinge portion to constitute a lip part, said portions extending over substantially the entire length of said strip; and b. a thin, pliable coating of synthetic resin composition substantially impervious to ozone covering substantially the entire surface of said hinge portion and covering the surfaces of said body portion and said blade portion adjacent said hinge portion, said lip part having an exposed, longitudinal edge face of rubber, said edge face being free from said coating.
Claim 2
Dependent Claim
137 words
An elongated windshield wiper element essentially consisting of a. a unitary rubber strip having a body portion, a blade portion, and a hinge portion of reduced cross section integrally connecting said blade portion to said body portion, said blade portion having a base part contiguously adjacent said hinge portion and tapering from said base part in a direction away from said hinge portion to constitute a lip part, said portions extending over substantially the entire length of said strip; and b. a thin, pliable coating of synthetic resin composition substantially impervious to ozone covering substantially the entire surface of said hinge portion and covering the surfaces of said body portion and said blade portion adjacent said hinge portion, said lip part having an exposed, longitudinal edge face of rubber, said edge face being free from said coating.
Claim 3
Dependent Claim
28 words
An element as set forth in claim 1, wherein said body portion has a surface of exposed rubber much greater than the surface thereof covered by said coating.
Claim 4
Dependent Claim
37 words
An element as set forth in claim 1, wherein the thickness of said coating is but a small fraction of the thickness of said lip part transversely of said direction and of the elongation of said strip.
Claim 5
Dependent Claim
16 words
An element as set forth in claim 1, wherein said resin composition is a synthetic elastomer.
Claim 6
Dependent Claim
14 words
An element as set forth in claim 4, wherein said elastomer is a polyurethane.
Claim 7
Dependent Claim
42 words
An element as set forth in claim 5, wherein said coating contains a pigment selected from the group consisting of titania, ferric oxide, chromic oxide, and carbon black in an amount of 10 to 90 percent of the weight of said polyurethane.
Claim 8
Dependent Claim
39 words
An element as set forth in claim 1, wherein said lip part has two longitudinal side faces connected by said edge face, respective elongated portions of said side faces contiguously adjacent said edge face being free from said coating.
Claim 9
Dependent Claim
38 words
An element as set forth in claim 7, wherein said elongated portions of said side faces have each a width of 0.1 to 1 mm, the thickness of said coating being between 10 Mu and 50 Mu .
Claim 10
Dependent Claim
43 words
An element as set forth in claim 1, wherein said composition resists hardening by contact with atmospheric ozone over a longer period than said rubber in said hinge portion, said hinge portion being protected from contact with said atmospheric ozone by said coating.
References Cited (Backward Citations)
US1915775A
Cited
US3035297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |