Patent US571521A successfully refreshed from Google Patents.
US3854561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unidirectional slip clutch
Assignee: DEPARTMENT OF HEALTH EDUCATION
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Filing: 1973-05-09
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Granted: 1974-12-17
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Expires: 1993-05-09
Abstract
Abstract A mechanical clutch which provides a solid connection between a shaft and a cylinder mounted thereon when the shaft rotates in one direction, while assuming a slipping configuration after attaining a predetermined torque when the shaft rotates in the opposite direction. A disc-shaped means is carried by the shaft within the cylinder, the disc-shaped means having a plurality of peripherally spaced grooves arranged in the circumference thereof, each of which has a shallow end and a deep end, with a ball received in each groove. When the shaft rotates in one direction, the balls contact the cylinder, thus providing a solid connection, while the balls fail to contact the cylinder when the shaft rotates in the opposite direction. However, an adjustable spring is provided to preclude relative rotation between the shaft and cylinder, i.e., slippage, until the spring pressure is overcome.
Inventors
- 👤 H Conde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:41
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/06; F16D41/064; F16D41/066; F16D47/00; F16D47/04; F16D7/00; F16D7/02; F16D7/024; F16D7/025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
238 words
Apparatus which functions as a unidirectional slip clutch comprising: a shaft; a cylinder mounted in bearings on said shaft; said shaft having fixedly mounted thereon within the cylinder a disc-shaped means having a plurality of peripherally spaced grooves located in the circumference thereof, each groove receiving a ball therein and having a shallow portion at one end of the groove and a deep portion at the other end, the grooves being triangular shaped, with the shallow portion of the groove being located at the end of the groove which corresponds to the apex of the triangle; first and second friction discs mounted on the shaft, said first friction disc being located between the disc-shaped means and one inner end wall of the cylinder, said second friction disc being located on the opposite side of said disc-shaped member; a spring located within the cylinder, one end of said spring engaging said second friction disc, the other end engaging an axially adjustable means carried by said cylinder so that the torque between the shaft and cylinder may be varied by varying the pressure on said spring, said bearings being located on the ends of said cylinder, one of said bearings being threadedly carried at the end of said cylinder remote from said disc-shaped means and defining said axially adjustable means, the threadedly carried bearing being provided with at least one recess in its outer surface for engagement by rotating means.
Claim 2
Dependent Claim
238 words
Apparatus which functions as a unidirectional slip clutch comprising: a shaft; a cylinder mounted in bearings on said shaft; said shaft having fixedly mounted thereon within the cylinder a disc-shaped means having a plurality of peripherally spaced grooves located in the circumference thereof, each groove receiving a ball therein and having a shallow portion at one end of the groove and a deep portion at the other end, the grooves being triangular shaped, with the shallow portion of the groove being located at the end of the groove which corresponds to the apex of the triangle; first and second friction discs mounted on the shaft, said first friction disc being located between the disc-shaped means and one inner end wall of the cylinder, said second friction disc being located on the opposite side of said disc-shaped member; a spring located within the cylinder, one end of said spring engaging said second friction disc, the other end engaging an axially adjustable means carried by said cylinder so that the torque between the shaft and cylinder may be varied by varying the pressure on said spring, said bearings being located on the ends of said cylinder, one of said bearings being threadedly carried at the end of said cylinder remote from said disc-shaped means and defining said axially adjustable means, the threadedly carried bearing being provided with at least one recess in its outer surface for engagement by rotating means.
Claim 3
Dependent Claim
277 words
Apparatus which functions as a unidirectional slip clutch comprising: a shaft; a cylinder mounted in bearings on said shaft; said shaft having fixedly mounted thereon within the cylinder a disc-shaped means having a plurality of peripherally spaced grooves located in the circumference thereof, each groove receiving a ball therein and haVing a shallow portion at one end of the groove and a deep portion at the other end, said disc-shaped means including an element having a disc-shaped portion and a hub portion, means for securing said hub portion to said shaft, said grooves being defined by L-shaped cut-out portions at spaced locations on said disc-shaped portion of said element, one edge of said L-shaped cut-out portions extending perpendicularly to a radius of said disc-shaped portion, and washer members on both sides of said disc-shaped portion; first and second friction discs mounted on the shaft, said first friction disc being located between the disc-shaped means and one inner end wall of the cylinder, said second friction disc being located on the opposite side of said disc-shaped member; a spring located within the cylinder, one end of said spring engaging said second friction disc, the other end engaging an axially adjustable means carried by said cylinder so that the torque between the shaft and cylinder may be varied by varying the pressure on said spring, said bearings being located on the ends of said cylinder, one of said bearings being threadedly carried at the end of said cylinder remote from said disc-shaped means and defining said axially adjustable means, the threadedly carried bearing being provided with at least one recess in its outer surface for engagement by rotating means.
Claim 4
Dependent Claim
277 words
Apparatus which functions as a unidirectional slip clutch comprising: a shaft; a cylinder mounted in bearings on said shaft; said shaft having fixedly mounted thereon within the cylinder a disc-shaped means having a plurality of peripherally spaced grooves located in the circumference thereof, each groove receiving a ball therein and haVing a shallow portion at one end of the groove and a deep portion at the other end, said disc-shaped means including an element having a disc-shaped portion and a hub portion, means for securing said hub portion to said shaft, said grooves being defined by L-shaped cut-out portions at spaced locations on said disc-shaped portion of said element, one edge of said L-shaped cut-out portions extending perpendicularly to a radius of said disc-shaped portion, and washer members on both sides of said disc-shaped portion; first and second friction discs mounted on the shaft, said first friction disc being located between the disc-shaped means and one inner end wall of the cylinder, said second friction disc being located on the opposite side of said disc-shaped member; a spring located within the cylinder, one end of said spring engaging said second friction disc, the other end engaging an axially adjustable means carried by said cylinder so that the torque between the shaft and cylinder may be varied by varying the pressure on said spring, said bearings being located on the ends of said cylinder, one of said bearings being threadedly carried at the end of said cylinder remote from said disc-shaped means and defining said axially adjustable means, the threadedly carried bearing being provided with at least one recess in its outer surface for engagement by rotating means.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |