US3750782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed overrunning clutch
Assignee: Ford Motor Co
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Filing: 1971-10-08
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Granted: 1973-08-07
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Expires: 1991-10-08
Abstract
Abstract An overrunning clutch adapted especially for use in an engine starter motor drive for a high speed gas turbine engine comprising a driving inner race, a cammed outer race adapted to be connected drivably to a gas turbine gasifier, clutch rollers disposed in cam recesses between said races, friction blocks situated between the individual rollers and adjacent reaction walls on the outer race and springs enclosed within the reaction blocks, the latter limiting the degree of tangential movement of the rollers and retarding their rate of displacement while controlling the orientation of the rollers with respect to the outer race.
Inventors
- 👤 S Costantini
- 👤 T Stockton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:38
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/06; F16D41/064; F16D41/066; F02; F02N; F02N15/00; F02N15/02; F02N15/022; F02N15/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
205 words
An overrunning clutch adapted to be used in a high speed driveline for transferring torque from a driving shaft to a driven shaft, an inner race connected to one shaft, an outer race connected to the other shaft, cam recesses formed in said outer race, a clutch roller situated in each recess, a plurality of reaction shoulders formed in said outer race, one shoulder being situated between each pair of rollers, a reaction block formed of shock absorbing, resilient material situated between each reaction shoulder and the adjacent roller, a spring opening formed in each reaction block, and a compression spring in each spring opening, each spring acting on the adjacent reaction shoulder and on its reaction block whereby tangential forces applied to the adjacent roller tend to urge it into camming engagement with the wall of the adjacent cam recess, a predetermined clearance between each reaction shoulder and the adjacent reaction block, the outward surface of said reaction block slidably and frictionally engaging the wall of its cam recess, said rollers moving out of clutching engagement with the inner race under the influence of centrifugal forces acting thereon as said reaction blocks are displaced tangentially and urged into engagement with the adjacent reaction shoulder.
Claim 2
Dependent Claim
205 words
An overrunning clutch adapted to be used in a high speed driveline for transferring torque from a driving shaft to a driven shaft, an inner race connected to one shaft, an outer race connected to the other shaft, cam recesses formed in said outer race, a clutch roller situated in each recess, a plurality of reaction shoulders formed in said outer race, one shoulder being situated between each pair of rollers, a reaction block formed of shock absorbing, resilient material situated between each reaction shoulder and the adjacent roller, a spring opening formed in each reaction block, and a compression spring in each spring opening, each spring acting on the adjacent reaction shoulder and on its reaction block whereby tangential forces applied to the adjacent roller tend to urge it into camming engagement with the wall of the adjacent cam recess, a predetermined clearance between each reaction shoulder and the adjacent reaction block, the outward surface of said reaction block slidably and frictionally engaging the wall of its cam recess, said rollers moving out of clutching engagement with the inner race under the influence of centrifugal forces acting thereon as said reaction blocks are displaced tangentially and urged into engagement with the adjacent reaction shoulder.
Claim 3
Dependent Claim
61 words
The combination as set forth in claim 1 wherein said reaction blocks are formed with an outer surface having a contour that substantially matches the contour of the adjacent wall of said cam recesses, one axial side of said reaction block engaging the adjacent roller throughout substantially its entire length thereby preventing skewing of the roller with respect to the races.
Claim 4
Dependent Claim
82 words
The combination as set forth in claim 1 wherein the maximum compression of said springs is equal to the clearance of said reaction block with respect to the adjacent reaction shoulder thereby avoiding flattening of the springs due to centrifugal forces acting on the rollers, the centrifugal force acting on the reaction blocks creating friction forces upon displacement of the reaction blocks relative to the outer race thereby modifying the rate of roll-out of the rollers upon overspeeding of the outer race.
Claim 5
Dependent Claim
81 words
The combination as set forth in claim 2 wherein the maximum compression of said spring is equal to the clearance of said reaction block with respect to the adjacent reaction shoulder thereby avoiding flattening of the springs due to centrifugal forces acting on the rollers, the centrifugal forces acting on the reaction blocks creating forces upon displacement of the reaction blocks relative to the outer race thereby modifying the rate of roll-out of the rollers upon overspeeding of the outer race.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |