Patent JPS6378680A successfully refreshed from Google Patents.
US3752277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque clutch mechanism in an air wrench
Assignee: Individual
•
Filing: 1971-10-26
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Granted: 1973-08-14
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Expires: 1991-10-26
Abstract
Abstract A torque clutch mechanism in an air wrench, comprising a torque clutch means capable of not only closing an air supply suspension valve by detecting an excess counterreactive force when such force is applied to the rotor shaft of said air wrench, but also reversing said rotor shaft.
Inventors
- 👤 S Nakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:36
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/06; B; B25; B25B; B25B23/00; B25B23/14; B25B23/145
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
189 words
A torque clutch for an air wrench, comprising an annular clutch member, a rotary shaft positioned within said annular clutch member with a space between the annular shaft and the clutch member, a plurality of stationary rolls mounted at intervals around the internal periphery of said annular clutch member, a plurality of spring members mounted around the internal periphery of said annular clutch member at positions adjacent said stationary rolls, a plurality of main movable rolls equal in number to the number of stationary rolls and having a diameter slightly larger than the clearance between the stationary rolls and the external periphery of said shaft, said main movable rolls being held against said rotary shaft and said stationary rolls by said spring means and being rotatably supported in said positions, whereby a predetermined torque between said shaft and said clutch member forces said main movable rolls against said rotary shaft and said stationary rolls for clutching said shaft and clutch member together, and a torque larger than said predetermined torque forces said main movable rollers past said stationary rolls and said shaft runs freely within said main movable rolls.
Claim 2
Dependent Claim
189 words
A torque clutch for an air wrench, comprising an annular clutch member, a rotary shaft positioned within said annular clutch member with a space between the annular shaft and the clutch member, a plurality of stationary rolls mounted at intervals around the internal periphery of said annular clutch member, a plurality of spring members mounted around the internal periphery of said annular clutch member at positions adjacent said stationary rolls, a plurality of main movable rolls equal in number to the number of stationary rolls and having a diameter slightly larger than the clearance between the stationary rolls and the external periphery of said shaft, said main movable rolls being held against said rotary shaft and said stationary rolls by said spring means and being rotatably supported in said positions, whereby a predetermined torque between said shaft and said clutch member forces said main movable rolls against said rotary shaft and said stationary rolls for clutching said shaft and clutch member together, and a torque larger than said predetermined torque forces said main movable rollers past said stationary rolls and said shaft runs freely within said main movable rolls.
Claim 3
Dependent Claim
35 words
A torque clutch as claimed in claim 1 further comprising clutch operation auxiliary rolls rotatably positioned between said annular clutch member and said rotary shaft and between adjacent main movable rolls for stabilizing clutch action.
Claim 4
Dependent Claim
34 words
A torque clutch as claimed in claim 1 in which said stationary rolls are resilient rolls and said clutch member has recesses in the internal periphery thereof in which said resilient rolls are mounted.
Claim 5
Dependent Claim
87 words
A torque clutch as claimed in claim 1 in which the internal periphery of said clutch member has a plurality of projections thereon defining between them grooves in which said stationary rolls are positioned, a pin on each projection, and said spring members each comprise a twisted coil spring having a coil portion mounted on said pin and having legs depending toward the shaft from the coil portion and engaged with the main movable rolls for urging them into contact with the stationary rolls and said shaft.
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |