US3665780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensioning assemblies for drive chains
Assignee: Air Lec Ind Inc
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Filing: 1970-10-09
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Granted: 1972-05-30
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Expires: 1990-10-09
Abstract
Abstract An idler sprocket assembly for keeping tension on the drive chain of a drive assembly. The device has a stationary but adjustable mounting bracket positioned between a drive shaft and a driven shaft. The drive chain runs over an idler sprocket carried on the end of a pivotally mounted swing arm for maintaining tension on the chain.
Inventors
- 👤 John T Lunenschloss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:02
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/12; F16H7/1254; F16H7/1281; F16H2007/0876; F16H2007/088; F16H2007/0889; F16H2007/0893
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
In a drive assembly having a drive shaft, a driven shaft substantially parallel to said drive shaft, and a drive chain trained over sprockets on said shafts, a self-regulating chain tensioning assembly comprising: a. a mounting bracket fixedly positioned between the drive shaft and the driven shaft, b. a swing arm assembly depending from said mounting bracket for free pivotable movement from a vertical position toward and away from said shafts about a pivot axis substantially parallel to said shafts in response to the direction of movement of said chain, and c. an idler sprocket rotatably journalled on said swing arm assembly, said drive chain running over said idler sprocket between the pivot axis of said swing arm and the axis of rotation of said idler sprocket.
Claim 2
Dependent Claim
127 words
In a drive assembly having a drive shaft, a driven shaft substantially parallel to said drive shaft, and a drive chain trained over sprockets on said shafts, a self-regulating chain tensioning assembly comprising: a. a mounting bracket fixedly positioned between the drive shaft and the driven shaft, b. a swing arm assembly depending from said mounting bracket for free pivotable movement from a vertical position toward and away from said shafts about a pivot axis substantially parallel to said shafts in response to the direction of movement of said chain, and c. an idler sprocket rotatably journalled on said swing arm assembly, said drive chain running over said idler sprocket between the pivot axis of said swing arm and the axis of rotation of said idler sprocket.
Claim 3
Dependent Claim
39 words
In a drive assembly, a chain tensioning assembly as specified in claim 1 wherein said mounting bracket has an adjustable threaded member for moving the pivot axis of said swing arm assembly toward and away from the drive chain.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |