US3893556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid released clutch
Assignee: Dana Inc
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Filing: 1974-05-02
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Granted: 1975-07-08
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Expires: 1994-05-02
Abstract
Abstract A normally engaged torque transmitting device is disclosed. In a typical application, the device is used as a brake to resist rotation of a shaft. The device consists of two members normally frictionally clamped together by one or more sets of interleaved friction discs and separator plates such as those commonly associated with shaft connecting clutches. The first member is a cylindrical housing with means for attachment to a shaft, stationary frame member, or the like. The housing includes a bore in which is received at least one friction disc splined thereto to permit axial but not rotational movement with respect thereto. The second member is a collar for fixed connection to a shaft or the like and includes outwardly extending separator plates interleaved with the friction discs on the housing. The friction discs splined to the housing and separator plates splined to the collar are urged into engagement by a pressure plate and spring means. A tubular member is carried within and engages the pressure plate. Two spaced annular plates are carried between the housing and tubular member. Introduction of fluid in the space between the annular plates separate the plates and, via the tubular member, moves the pressure plate away from the friction discs and separator plates.
Inventors
- 👤 Jr Ted Lech
- 👤 Christian M Waldhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:18
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; F16D59/00; F16D59/02; F16D67/00; F16D67/02; F16D2055/0004; F16D2055/0058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
348 words
A normally engaged torque transmitting device for connecting an input and output comprising: a. a tubular housing adapted for connection to said output including a bore, a first axially extending spline within said bore and an annular groove defined in said bore; b. a first snap ring carried in said groove; c. a friction disc carried within said bore and axially piloted on said first spline; d. an input member adapted for connection to sAid input and including a second axially extending spline thereon; e. a separator plate adjacent said friction disc, carried on said input member and axially piloted on said second spline; f. an annular pressure plate slidably received within said bore and adjacent said friction disc and separator plate; g. release means carried within said bore to selectively urge said pressure plate away from said friction disc and separator plate, said release means comprising: i. an annular reaction plate slidably and sealingly carried within said bore and secured against axial movement therealong in the direction of said annular pressure plate by said first snap ring; ii. a tubular axially shiftable member defining an annular groove on the exterior of each end thereof, a second and third snap ring carried in respective ones of said grooves therein, said second snap ring engaging said annular pressure plate, said tubular member slidably and sealingly engaging the interior of said annular reaction plate; iii. a third annular plate, located within and slidably and sealingly engaging said bore and engaging the exterior said axially shiftable tubular member and said third snap ring; iv. said third annular plate being adjacent and spaced from said annular reaction plate and forming a cavity therebetween; and v. means for introducing fluid within said cavity whereby said third annular plate moves away from said reaction plate and thereby moves said pressure plate away from said discs; and h. belville spring means between said pressure plate and said reaction plate, said spring means reacting against said pressure plate and said first snap ring to normally bias said pressure plate toward said friction disc and separator plate.
Claim 2
Dependent Claim
348 words
A normally engaged torque transmitting device for connecting an input and output comprising: a. a tubular housing adapted for connection to said output including a bore, a first axially extending spline within said bore and an annular groove defined in said bore; b. a first snap ring carried in said groove; c. a friction disc carried within said bore and axially piloted on said first spline; d. an input member adapted for connection to sAid input and including a second axially extending spline thereon; e. a separator plate adjacent said friction disc, carried on said input member and axially piloted on said second spline; f. an annular pressure plate slidably received within said bore and adjacent said friction disc and separator plate; g. release means carried within said bore to selectively urge said pressure plate away from said friction disc and separator plate, said release means comprising: i. an annular reaction plate slidably and sealingly carried within said bore and secured against axial movement therealong in the direction of said annular pressure plate by said first snap ring; ii. a tubular axially shiftable member defining an annular groove on the exterior of each end thereof, a second and third snap ring carried in respective ones of said grooves therein, said second snap ring engaging said annular pressure plate, said tubular member slidably and sealingly engaging the interior of said annular reaction plate; iii. a third annular plate, located within and slidably and sealingly engaging said bore and engaging the exterior said axially shiftable tubular member and said third snap ring; iv. said third annular plate being adjacent and spaced from said annular reaction plate and forming a cavity therebetween; and v. means for introducing fluid within said cavity whereby said third annular plate moves away from said reaction plate and thereby moves said pressure plate away from said discs; and h. belville spring means between said pressure plate and said reaction plate, said spring means reacting against said pressure plate and said first snap ring to normally bias said pressure plate toward said friction disc and separator plate.
References Cited (Backward Citations)
US2698676A
Cited
US2901066A
Cited
US2920732A
Cited
US3044595A
Cited
US3145816A
Cited
US3773152A
Cited
US3771627A
Cited
US3804219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |