Patent US4069904A successfully refreshed from Google Patents.
US4069904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic clutch release mechanism for motor vehicles
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1976-01-26
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Granted: 1978-01-24
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Expires: 1996-01-26
Abstract
Abstract A hydraulic release mechanism for automotive clutches and the like comprising a housing and a bearing assembly. The assembly comprises a non-rotating race ring, a rotatable race ring adapted to be connected to an operating element for said clutch and a plurality of rolling elements arranged therebetween. The bearing assembly is mounted with respect to the housing for axially slidable movement and radially floating movement. The housing under pressure, the force of which is transmitted through the end of the non-rotating race ring, the rolling elements, and the rotating race ring to the clutch operating element. Preferably, the means for mounting the bearing assembly with respect to said housing comprises a flexible bellows.
Inventors
- 👤 Roy Peter Garrett
- 👤 Derek Ray Parkins
- 👤 Manfred Brandenstein
- 👤 Armin Olschewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:31
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/12; F16D23/14; F16D23/147; F16D25/00; F16D25/08; F16D25/082; F16D25/083
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A hydraulic release mechanism for automotive clutches and the like comprising a cylindrical housing open at one end, a bearing assembly located within said housing at said open end and comprising a non-rotating outer race ring having a cylindrical surface spaced from said housing, a rotatable race ring adapted to be connected to an operating element for said clutch and a plurality of rolling elements arranged therebetween, a flexible elastomeric wall secured to said bearing assembly and to said housing and being folded within the space between said outer race ring and said housing to engage the cylindrical surfaces of said housing and said non-rotating race ring for axially slidable movement and radially floating movement with respect thereto, said wall defining with said housing a chamber for receiving fluid under pressure, the force of which is transmitted through the end of the non-rotating race ring, said rolling elements, and rotating race ring to said clutch operating element.
Claim 2
Dependent Claim
157 words
A hydraulic release mechanism for automotive clutches and the like comprising a cylindrical housing open at one end, a bearing assembly located within said housing at said open end and comprising a non-rotating outer race ring having a cylindrical surface spaced from said housing, a rotatable race ring adapted to be connected to an operating element for said clutch and a plurality of rolling elements arranged therebetween, a flexible elastomeric wall secured to said bearing assembly and to said housing and being folded within the space between said outer race ring and said housing to engage the cylindrical surfaces of said housing and said non-rotating race ring for axially slidable movement and radially floating movement with respect thereto, said wall defining with said housing a chamber for receiving fluid under pressure, the force of which is transmitted through the end of the non-rotating race ring, said rolling elements, and rotating race ring to said clutch operating element.
Claim 3
Dependent Claim
27 words
The hydraulic release mechanism according to claim 1 wherein said elastomeric wall comprises a flexible bellows sealing the annular space between the housing and the bearing assembly.
Claim 4
Dependent Claim
30 words
The hydraulic release mechanism according to claim 2 including a cover plate abutting the pressure end of said bearing assembly to enclose said bearing assembly and support said flexible bellows.
Claim 5
Dependent Claim
39 words
The hydraulic release mechanism according to claim 3 wherein the outer edge of the elastic bellows is fastened to the housing and the inner edge is fastened at least in part to the cover plate of the bearing assembly.
Claim 6
Dependent Claim
20 words
The hydraulic release mechanism according to claim 4 including spring means for normally biasing said bearing assembly in one direction.
Claim 7
Dependent Claim
36 words
The hydraulic release mechanism according to claim 5 wherein said spring means is interposed on the pressure side of said bearing between a pressure plate mounted over the bellows and the opposing wall of said housing.
References Cited (Backward Citations)
CH302252A
Cited
US2809308A
Cited
US3122895A
Cited
US3250353A
Cited
US3429410A
Cited
US3695407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |