Patent US2822982A successfully refreshed from Google Patents.
Patent US4396100A successfully refreshed from Google Patents.
US4396100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction lining for multiple-disk clutches or multiple-disk brakes
Assignee: Daimler Benz AG
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Filing: 1980-12-15
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Granted: 1983-08-02
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Expires: 2000-12-15
Abstract
Abstract A friction lining for a multiple disk clutch or a multiple disk brake, with grooves extending in a direction from a radially inner lining edge to a radially outer lining edge. Individual ones of these grooves exhibit pronounced rectangular or orthogonal transistion areas between the groove and a surface of the friction lining with the remaining grooves exhibiting non-rectangular transistion areas of the groove edges to the friction surface of the friction lining. A plurality of grooves provided non-rectangular transistional areas extend linearly and are not connected to the grooves having the rectangular transistional areas. At least one groove having a rectangular transistional area and being open at least toward the outer lining edge is disposed between two circumferentially adjacent or neighboring grooves having a non-rectangular transistional area.
Inventors
- 👤 Georg Eltze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:37
CPC Classifications
F; F16; F16D; F16D69/00; F16D13/00; F16D13/58; F16D13/60; F16D13/64; F16D13/648; F16D13/72; F16D65/00; F16D65/02; F16D65/12; F16D65/127; F16D2069/004; F16D65/122
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
159 words
Friction lining for one of a multiple-disk clutch or a multiple-disk brake, the friction lining comprising a plurality of first grooves radially extending from a radially inner lining edge to a radially outer lining edge of the friction lining, each of said first grooves being provided with a pronounced orthogonal transition area between the upper edge of the groove and a surface of the friction lining, a plurality of second grooves are provided, each of the second grooves are provided with a non-rectangular transitional area between an upper edge of the groove and the surface of the friction lining, each of the second grooves extend linearly and are unconnected with the first grooves, and at least one groove having an orthogonal transistional area between the grooves and the surface of the friction lining is disposed between two circumferentially adjacent second grooves, said at least one groove is open at least toward the outer lining edge of the friction lining.
Claim 2
Dependent Claim
159 words
Friction lining for one of a multiple-disk clutch or a multiple-disk brake, the friction lining comprising a plurality of first grooves radially extending from a radially inner lining edge to a radially outer lining edge of the friction lining, each of said first grooves being provided with a pronounced orthogonal transition area between the upper edge of the groove and a surface of the friction lining, a plurality of second grooves are provided, each of the second grooves are provided with a non-rectangular transitional area between an upper edge of the groove and the surface of the friction lining, each of the second grooves extend linearly and are unconnected with the first grooves, and at least one groove having an orthogonal transistional area between the grooves and the surface of the friction lining is disposed between two circumferentially adjacent second grooves, said at least one groove is open at least toward the outer lining edge of the friction lining.
Claim 3
Dependent Claim
24 words
The friction lining according to claim 1, wherein the plurality of second grooves are closed toward the outer lining edge of the friction lining.
Claim 4
Dependent Claim
15 words
The friction lining according to claim 1, wherein the plurality of second grooves extend radially.
Claim 5
Dependent Claim
45 words
The friction lining according to claim 3, wherein the at least one groove extends in parallel to one of the first grooves and is disposed between said one of the first grooves and a second groove circumferentially adjacent to said one of said first grooves.
Claim 6
Dependent Claim
48 words
The friction lining according to claim 4, wherein at least two grooves are provided and are disposed proximate to each other in a circumferential direction and also extend at right angles to each other, and one of the second grooves is disposed between said at least two grooves.
Claim 7
Dependent Claim
24 words
The friction lining according to claim 5, wherein four second grooves are provided and are arranged in a uniform distribution around the friction lining.
Claim 8
Dependent Claim
45 words
The friction lining according to claim 1, wherein the at least one groove extends in parallel to one of the first grooves and is disposed between said one of the first grooves and a second groove circumferentially adjacent to said one of said first groove.
Claim 9
Dependent Claim
51 words
The friction lining according to claim 1, 2, or 3, wherein at least two grooves are provided and are disposed proximate to each other in a circumferential direction and also extend at right angles to each other, and one of the second grooves is disposed between said at least two grooves.
Claim 10
Dependent Claim
27 words
The friction lining according to claims 1, 2, or 3, wherein four second grooves are provided and are arranged in a uniform distribution around the friction lining.
Claim 11
Dependent Claim
72 words
The friction lining according to claims 1, 2, or 3, wherein at least four first grooves are uniformaly distributed about a circumference of the friction lining, a plurality of grooves are disposed between circumferentially adjacent first grooves with some of said plurality of grooves extending in parallel to one of the circumferentially adjacent first grooves and the remaining grooves extending in parallel to the second one of the circumferentially adjacent first grooves.
Claim 12
Dependent Claim
40 words
The friction lining according to claim 10, wherein at least two circumferentially proximate grooves of said plurality of grooves extend at a right angle to each other, and one of the second grooves is disposed between said last mentioned grooves.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |