US3926286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring grip clutch
Assignee: Reell Precision Manufacturing Corp
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Filing: 1974-09-23
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Granted: 1975-12-16
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Expires: 1994-09-23
Abstract
Abstract A spring grip clutch comprising an expandable spring which grips adjacent peripheral surfaces of driving and driven hubs mounted in axial alignment on a tubular sleeve, wherein one of said hubs extends beyond the sleeve and attaches directly to a drive shaft or trunnion passing within the sleeve.
Inventors
- 👤 Lee W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:16
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/02; B65H3/06; B65H3/0669; F; F16; F16D; F16D41/00; F16D41/20; F16D41/206
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A one-way helical spring clutch comprising a tubular shaft or sleeve having an outside and an inside diameter, first and second hub members, each having an axial bore, supported on said shaft in axial alignment and having adjoining peripheral surfaces, and an expandable spring member grippingly encircling said surfaces, one of said hub members being rigidly attached to, and extending axially beyond, said shaft, the axial bore in the extended portion being of approximately the same diameter as the inside diameter of said shaft.
Claim 2
Dependent Claim
84 words
A one-way helical spring clutch comprising a tubular shaft or sleeve having an outside and an inside diameter, first and second hub members, each having an axial bore, supported on said shaft in axial alignment and having adjoining peripheral surfaces, and an expandable spring member grippingly encircling said surfaces, one of said hub members being rigidly attached to, and extending axially beyond, said shaft, the axial bore in the extended portion being of approximately the same diameter as the inside diameter of said shaft.
Claim 3
Dependent Claim
49 words
Clutch of claim 1 wherein said one hub member includes fastening means within said extended portion for fastening said clutch to a drive shaft or trunnion fitting within said tubular shaft, and wherein said peripheral surfaces of said hubs are of greater hardness and wear-resistance than said extended portion.
Claim 4
Dependent Claim
20 words
Clutch of claim 2 wherein said hard wear-resistant peripheral surfaces are provided by replaceable rings of sintered powdered metal alloy.
Claim 5
Dependent Claim
32 words
Clutch of claim 1 including a terminally slotted sleeve loosely surrounding said spring member and wherein said spring member includes a radially extending terminal fitting within the terminal slot in said sleeve.
Claim 6
Dependent Claim
28 words
Clutch of claim 4 wherein each of said hub members is provided with a narrow flange intermediate the ends and said sleeve is rotatably supported on said flanges.
Claim 7
Dependent Claim
16 words
Clutch of claim 5 wherein said sleeve is provided with at least one external longitudinal ridge.
References Cited (Backward Citations)
US3618721A
Cited
US3726372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |