US3598210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch comprising a helical spring actuator
Assignee: Individual
•
Filing: 1969-03-10
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Granted: 1971-08-10
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Expires: 1989-03-10
Abstract
Abstract A friction clutch or brake having a cylindrical drum within a close fitting tubular collet, a set of rollers surrounding the collet, a helical spring circumscribing the rollers and means for circumferentially tightening the spring. When the spring is tightened it acts radially on the rollers which in turn compress the collet into frictional engagement with the drum, thereby transmitting torque between the collet and the drum. The transmitted torque will gradually increase as the rollers rotate after the spring is tightened, permitting clutching of heavy inertia loads without heavy torsional impact. Various functional and structural modifications employing this principle are also disclosed.
Inventors
- 👤 William H Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:03
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
51 words
A clutch comprising at least two frictionally engageable means having at least one cylindrical engaging surface, rolling means comprising rollers surrounding said frictionally engageable means and means surrounding said rollers to act radially thereon, said means surrounding said rollers being not rotatively connected to either of said two frictionally engageable means.
Claim 2
Dependent Claim
51 words
A clutch comprising at least two frictionally engageable means having at least one cylindrical engaging surface, rolling means comprising rollers surrounding said frictionally engageable means and means surrounding said rollers to act radially thereon, said means surrounding said rollers being not rotatively connected to either of said two frictionally engageable means.
Claim 3
Dependent Claim
28 words
A clutch as defined in claim 1 wherein at least one of said frictionally engageable means has a tubular portion which has at least one radially moveable portion.
Claim 4
Dependent Claim
48 words
A clutch as defined in claim 1 wherein the outermost said frictionally engageable means has a tubular portion with a recess in the outside diameter of said tubular portion parallel to the axis of said tubular portion, said recess being at least as long as said rolling means.
Claim 5
Dependent Claim
26 words
A clutch as described in claim 1 wherein said rolling means comprises a series of rollers retained in positional relationship with each other by a cage.
Claim 6
Dependent Claim
28 words
A clutch as defined in claim 1 wherein said rolling means comprises a series of rollers which extend substantially the full length of the said cylindrical engaging surface.
Claim 7
Dependent Claim
18 words
A clutch as defined in claim 1 wherein said rolling means comprises more than one row of rollers.
Claim 8
Dependent Claim
45 words
A clutch as defined in claim 1, including input anD output members and connecting means coupling at least one of said frictionally engageable means to at least one of said members, said connecting means permitting limited radial expansion and contraction of said frictionally engageable means.
Claim 9
Dependent Claim
17 words
A clutch as defined in claim 1 wherein said means surrounding said rollers comprises a helical band.
Claim 10
Dependent Claim
29 words
A clutch as defined in claim 1 wherein said means surrounding said rollers comprises a helical band and releasable actuating means for tightening said band on said roller means.
Claim 11
Dependent Claim
20 words
A clutch as defined in claim 9 wherein said actuating means comprises arcuately adjustable means for biasing said actuating means.
Claim 12
Dependent Claim
54 words
A clutch comprising at least two frictionally engageable means, rollers surrounding said frictionally engageable means, helical compression means surrounding said rollers, a housing having one end of said helical compression means secured thereto, securing means preventing rotation of said housing and actuating means having the other end of said helical compression means secured thereto.
Claim 13
Dependent Claim
54 words
A clutch comprising at least two frictionally engageable means, rollers surrounding said frictionally engageable means, helical compression means surrounding said rollers, a housing having one end of said helical compression means secured thereto, securing means preventing rotation of said housing and actuating means having the other end of said helical compression means secured thereto.
Claim 14
Dependent Claim
20 words
A clutch as described in claim 11 wherein said securing means comprises a stationary clamp adjustably secured to said housing.
Claim 15
Dependent Claim
76 words
A clutch comprising an arbor secured to one drive member, a drum secured to a second drive member, a collet surrounding said drum and frictionally engageable therewith, means connecting said collet to said arbor, rollers surrounding said collet, helical compression means surrounding the periphery of said rollers, a housing secured to one end of said helical spring, means preventing said housing from rotating and actuating means secured to the other end of said helical compression means.
Claim 16
Dependent Claim
76 words
A clutch comprising an arbor secured to one drive member, a drum secured to a second drive member, a collet surrounding said drum and frictionally engageable therewith, means connecting said collet to said arbor, rollers surrounding said collet, helical compression means surrounding the periphery of said rollers, a housing secured to one end of said helical spring, means preventing said housing from rotating and actuating means secured to the other end of said helical compression means.
Claim 17
Dependent Claim
82 words
A clutch comprising a first drive member, a second drive member, at least one substantially cylindrical, radially contractable first friction member connected to said first drive member by a first coupling means, at least one substantially cylindrical, contractable second friction member in interleaving relationship with at least one of said first friction members connected to said second drive member by a second coupling means, rollers surrounding the outermost said friction member and means disposed about said rollers for urging them radially inward.
Claim 18
Dependent Claim
82 words
A clutch comprising a first drive member, a second drive member, at least one substantially cylindrical, radially contractable first friction member connected to said first drive member by a first coupling means, at least one substantially cylindrical, contractable second friction member in interleaving relationship with at least one of said first friction members connected to said second drive member by a second coupling means, rollers surrounding the outermost said friction member and means disposed about said rollers for urging them radially inward.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |