Patent US5705536A successfully refreshed from Google Patents.
Patent US3866481A successfully refreshed from Google Patents.
US3866481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque-loading device
Assignee: Motors Liquidation Co
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Filing: 1973-10-23
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Granted: 1975-02-18
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Expires: 1993-10-23
Abstract
Abstract A device for applying a load to a rotary power tool, including a ball-screw drive arrangement for changing rotary movement of the power tool to axial movement, and associated variable compressible means, such as concave-shaped disc springs or a controlled bellows unit, for providing a counter-force to the resultant axial movement, with a predetermined rate of force build-up developed within the compressible means, and a maximum force developed proportional to the torque output of the power tool.
Inventors
- 👤 John R Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:46
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/2021; B; B23; B23Q; B23Q11/00; B23Q11/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18696
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
156 words
A device for providing torque-loading of a rotary power tool, said device comprising a housing, a sleeve member mounted in said housing, a shaft rotatably mounted through said sleeve member, circumferentially aligned spiral grooves formed in said sleeve member and on said shaft, said spiral grooves cooperating to form a spiraling conduit throughout the length of said sleeve member, a plurality of balls operatively connected to said spiraling conduit, said cooperating balls and spiralling grooves serving to change rotary movement of said shaft to axial movement thereof in response to torque applied to the exposed end of said shaft, bellows means mounted in said housing intermediate an end wall thereof and the inner end of said shaft and arranged to provide a counter-force to said axial movement of said shaft, a source of fluid under pressure for said bellows means, and means for varying the pressure of said fluid within said bellows means to predetermined levels.
Claim 2
Independent Claim
156 words
A device for providing torque-loading of a rotary power tool, said device comprising a housing, a sleeve member mounted in said housing, a shaft rotatably mounted through said sleeve member, circumferentially aligned spiral grooves formed in said sleeve member and on said shaft, said spiral grooves cooperating to form a spiraling conduit throughout the length of said sleeve member, a plurality of balls operatively connected to said spiraling conduit, said cooperating balls and spiralling grooves serving to change rotary movement of said shaft to axial movement thereof in response to torque applied to the exposed end of said shaft, bellows means mounted in said housing intermediate an end wall thereof and the inner end of said shaft and arranged to provide a counter-force to said axial movement of said shaft, a source of fluid under pressure for said bellows means, and means for varying the pressure of said fluid within said bellows means to predetermined levels.
Claim 3
Independent Claim
236 words
A device for providing torque-loading of a rotary power tool, said device comprising a housing, a sleeve member mounted in said housing, a shaft rotatably mounted through said sleeve member, means formed on the outer end of said shaft adapted for the mounting thereon of said rotary power tool, circumferentially aligned spiral grooves formed in said sleeve member and on said shaft, said spiral grooves cooperating to form a spiraling conduit throughout the length of said sleeve member, a storage conduit formed in a wall portion of said sleeve member, the open ends of said storage conduit being aligned with spaced portions of said spiraling conduit, a plurality of balls retained in said storage conduit for rolling cooperation with said spiraling conduit, said cooperating balls and spiraling grooves serving to change rotary movement of said shaft to axial movement thereof in response to torque applied to the exposed extended end of said shaft, a flange formed on the inner end of said shaft for initially abutting againsit the end face of said sleeve member, a retainer plate axially aligned with said flange, bearing means mounted intermediate said retainer plate and said flange, a bellows unit mounted in said housing intermediate an end wall thereof and the adjacent face of said retainer plate and arranged to provide a counter-force to said axial movement of said shaft, and a source of fluid under pressure for said bellows unit.
Claim 4
Independent Claim
236 words
A device for providing torque-loading of a rotary power tool, said device comprising a housing, a sleeve member mounted in said housing, a shaft rotatably mounted through said sleeve member, means formed on the outer end of said shaft adapted for the mounting thereon of said rotary power tool, circumferentially aligned spiral grooves formed in said sleeve member and on said shaft, said spiral grooves cooperating to form a spiraling conduit throughout the length of said sleeve member, a storage conduit formed in a wall portion of said sleeve member, the open ends of said storage conduit being aligned with spaced portions of said spiraling conduit, a plurality of balls retained in said storage conduit for rolling cooperation with said spiraling conduit, said cooperating balls and spiraling grooves serving to change rotary movement of said shaft to axial movement thereof in response to torque applied to the exposed extended end of said shaft, a flange formed on the inner end of said shaft for initially abutting againsit the end face of said sleeve member, a retainer plate axially aligned with said flange, bearing means mounted intermediate said retainer plate and said flange, a bellows unit mounted in said housing intermediate an end wall thereof and the adjacent face of said retainer plate and arranged to provide a counter-force to said axial movement of said shaft, and a source of fluid under pressure for said bellows unit.
Claim 5
Independent Claim
251 words
A device for providing torque-loading of a rotary power tool, said device comprising a housing, a sleeve member mounted in said housing, a shaft rotatably mounted through said sleeve member, means formed on the outer end of said shaft adapted for the mounting thereon of said rotary power tool, circumferentially aligned spiral grooves formed in said sleeve member and on said shaft, said spiral grooves cooperating to form a spiraling conduit throughout the length of said sleeve member, a storage conduit formed in a wall portion of said sleeve member, the open ends of said storage conduit being aligned with spaced portions of said spiraling conduit, a plurality of balls retained in said storage conduit for rolling cooperation with said spiraling conduit, said cooperating balls and spiraling grooves serving to change rotary movement of said shaft to axial movement thereof in response to torque applied to the exposed extended end of said shaft, a flange formed on the inner end of said shaft for initially abutting against the end face of said sleeve member, a retainer plate axially aligned with said flange, bearing means mounted intermediate said retainer plate and said flange, a bellows unit mounted in said housing intermediate an end wall thereof and the adjacent face of said retainer plate and arranged to provide a counter-force to said axial movement of said shaft, a source of fluid under pressure for said bellows unit, and means for varying the pressure of said fluid within the bellows unit to predetermined levels.
Claim 6
Independent Claim
251 words
A device for providing torque-loading of a rotary power tool, said device comprising a housing, a sleeve member mounted in said housing, a shaft rotatably mounted through said sleeve member, means formed on the outer end of said shaft adapted for the mounting thereon of said rotary power tool, circumferentially aligned spiral grooves formed in said sleeve member and on said shaft, said spiral grooves cooperating to form a spiraling conduit throughout the length of said sleeve member, a storage conduit formed in a wall portion of said sleeve member, the open ends of said storage conduit being aligned with spaced portions of said spiraling conduit, a plurality of balls retained in said storage conduit for rolling cooperation with said spiraling conduit, said cooperating balls and spiraling grooves serving to change rotary movement of said shaft to axial movement thereof in response to torque applied to the exposed extended end of said shaft, a flange formed on the inner end of said shaft for initially abutting against the end face of said sleeve member, a retainer plate axially aligned with said flange, bearing means mounted intermediate said retainer plate and said flange, a bellows unit mounted in said housing intermediate an end wall thereof and the adjacent face of said retainer plate and arranged to provide a counter-force to said axial movement of said shaft, a source of fluid under pressure for said bellows unit, and means for varying the pressure of said fluid within the bellows unit to predetermined levels.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |