US3768324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic belt tensioning device
Assignee: Plenty and Son Ltd
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Filing: 1972-03-07
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Granted: 1973-10-30
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Expires: 1992-03-07
Abstract
Abstract An automatic belt-tensioning assembly for drive systems including a motor driving another device by means of a belt and pulleys, in which the motor and the driven device are mounted for relative movement, and an adjustable spring assembly urges them apart so as to provide a pre-settable tension in the belt.
Inventors
- 👤 Drake S Vanderstegen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
A belt drive assembly comprising a driving pulley, a driven pulley, and a belt connecting the said pulleys, mounting means for each of the said pulleys and resilient means urging the mounting means apart so as to tension the belt, a pivotting joint connecting the said mounting means, the mounting means for the driving pulley comprising a platform, a motor mounted on said platform and an output shaft for the said motor, the driving pulley being mounted on the said shaft, the mounting means for the driven pulley comprising a driven device, and an input shaft for the driven device, the driven pulley being mounted on the said shaft, in which the resilient means comprises a cylindrical housing pivotally connected to one of the said mounting means, a spring contained in the said housing, a piston movable in the said housing to compress said spring and a pivotting joint between said piston and the other of said mounting means.
Claim 2
Dependent Claim
159 words
A belt drive assembly comprising a driving pulley, a driven pulley, and a belt connecting the said pulleys, mounting means for each of the said pulleys and resilient means urging the mounting means apart so as to tension the belt, a pivotting joint connecting the said mounting means, the mounting means for the driving pulley comprising a platform, a motor mounted on said platform and an output shaft for the said motor, the driving pulley being mounted on the said shaft, the mounting means for the driven pulley comprising a driven device, and an input shaft for the driven device, the driven pulley being mounted on the said shaft, in which the resilient means comprises a cylindrical housing pivotally connected to one of the said mounting means, a spring contained in the said housing, a piston movable in the said housing to compress said spring and a pivotting joint between said piston and the other of said mounting means.
Claim 3
Dependent Claim
21 words
A belt drive assembly according to claim 1 in which the platform for the motor is mounted above the driven device.
Claim 4
Dependent Claim
205 words
A belt drive assembly comprising a driving pulley, a driven pulley, and a belt connecting the said pulleys, mounting means for each of the said pulleys resilient means urging the mounting means apart so as to tension the belt, a pivotting joint connecting the said mounting means, the mounting means for the driving pulley comprising a platform, a motor mounted on said platform, and an output shaft for the said motor, the driving pulley being mounted on the said shaft, the mounting means for the driven pullEy comprising a driven device, and an input shaft for the driven device, the driven pulley being mounted on the said shaft, in which the resilient means comprises, a cylindrical housing pivotally connected to one of the said mounting means, a spring contained in the said housing, a piston movable in the said housing to compress said spring, a pivotting joint between said piston and said platform, and spring adjusting means on the opposite end of said cylindrical housing comprising a threaded plug and a lock-nut on the said plug whereby the internal length of the cylindrical housing and thus the tension of the spring can be adjusted by rotating the plug and locking it in the required position.
Claim 5
Dependent Claim
205 words
A belt drive assembly comprising a driving pulley, a driven pulley, and a belt connecting the said pulleys, mounting means for each of the said pulleys resilient means urging the mounting means apart so as to tension the belt, a pivotting joint connecting the said mounting means, the mounting means for the driving pulley comprising a platform, a motor mounted on said platform, and an output shaft for the said motor, the driving pulley being mounted on the said shaft, the mounting means for the driven pullEy comprising a driven device, and an input shaft for the driven device, the driven pulley being mounted on the said shaft, in which the resilient means comprises, a cylindrical housing pivotally connected to one of the said mounting means, a spring contained in the said housing, a piston movable in the said housing to compress said spring, a pivotting joint between said piston and said platform, and spring adjusting means on the opposite end of said cylindrical housing comprising a threaded plug and a lock-nut on the said plug whereby the internal length of the cylindrical housing and thus the tension of the spring can be adjusted by rotating the plug and locking it in the required position.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |