US3874246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable pulley drive device
Assignee: Individual
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Filing: 1974-02-25
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Granted: 1975-04-01
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Expires: 1994-02-25
Abstract
Abstract A cable pulley drive device comprised of a double pulley having a pair of relatively closely spaced annular grooves about its peripheral surface to receive a major portion of two turns of a cable, said pulley being rotatably journaled between a pair of opposed side plates. Spaced from the double pulley and rotatably journaled between the side plates is a relatively small single cable transfer pulley, the plane through the center of the annular groove of which bisects the space between the two grooves of the double pulley. A cable passed around the three grooves of the two pulleys provides a top run from one of the double pulley grooves and a bottom run from the other groove. When the double pulley is driven by an appropriate drive means, the cable transfer pulley continuously transfers the cable from one of the double pulley grooves to the other depending upon the direction of rotation thereof.
Inventors
- 👤 Boyd Woodard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:37
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/04; F16H7/08; F16H7/10; F16H2007/0889; F16H2007/0891
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
199 words
A pulley drive device comprising: A. a main pulley rotatably mounted between a pair of fixed, opposed side plates including, 1. a pair of relatively closely spaced apart grooves about its peripheral face; B. a relatively small cable transfer pulley, rotatably journaled between said side plates, in a spaced relation to said main pulley, including, 1. a single groove about its peripheral face; C. a drive means such as a cable, first, passed forwardly around the first groove of said pair, second, passed rearwardly around said single groove of said cable transfer pulley, and, third, passed forwardly around the second groove of said pair, said cable terminating in a pair of cable runs extending rearwardly from said main pulley; D. a reversible motor drive means, drivingly connected to said main pulley; E. each of said pair of grooves being generally U-shaped in cross section with opposed side walls diverging somewhat outwardly from a rounded bottom portion, the diameter of said cable being such that it normally rides well up in each groove; when a load or tension is applied to one or both of said cable runs, said cable being drawn deeper into each of said pair of grooves.
Claim 2
Dependent Claim
199 words
A pulley drive device comprising: A. a main pulley rotatably mounted between a pair of fixed, opposed side plates including, 1. a pair of relatively closely spaced apart grooves about its peripheral face; B. a relatively small cable transfer pulley, rotatably journaled between said side plates, in a spaced relation to said main pulley, including, 1. a single groove about its peripheral face; C. a drive means such as a cable, first, passed forwardly around the first groove of said pair, second, passed rearwardly around said single groove of said cable transfer pulley, and, third, passed forwardly around the second groove of said pair, said cable terminating in a pair of cable runs extending rearwardly from said main pulley; D. a reversible motor drive means, drivingly connected to said main pulley; E. each of said pair of grooves being generally U-shaped in cross section with opposed side walls diverging somewhat outwardly from a rounded bottom portion, the diameter of said cable being such that it normally rides well up in each groove; when a load or tension is applied to one or both of said cable runs, said cable being drawn deeper into each of said pair of grooves.
Claim 3
Dependent Claim
78 words
A pulley drive device as defined in claim 1 wherein each of said pair of grooves is generally U-shaped in cross section with its opposed side walls diverging somewhat outwardly from a rounded bottom portion, the diameter of said cable being such that it normally rides well up in each groove; when a load or tension is applied to one or both of said cable runs, said cable being drawn deeper into each of said pair of grooves.
Claim 4
Dependent Claim
38 words
A pulley drive device as defined in claim 2 including a pair of like spaced apart pulley drive devices mounted adjacent the opposed ends of a transverse drive shaft comprising said rotatable mounting for each of said devices.
Claim 5
Dependent Claim
32 words
A pulley drive device as defined in claim 3 wherein said reversible motor drive means comprises an electric motor, drivingly connected to said transverse drive shaft as by sprocket and chain means.
Claim 6
Dependent Claim
20 words
A pulley drive device as defined in claim 1 including tensioning means for at least one of said cable runs.
Claim 7
Dependent Claim
68 words
A pulley drive device as defined in claim 5 wherEin the first of said pair of cable runs extends rearwardly around a tensioning pulley, then forwardly to a point of interconnection to the second of said pair of cable runs, said tensioning pulley being rotatably mounted to a slide block, including adjustment means, comprising said tensioning means, to selectably position said tensioning pulley relative to said main pulley.
Claim 8
Dependent Claim
65 words
A pulley drive device as defined in claim 1 including at least one additional groove in both the main pulley and cable transfer pulley whereby said cable would be passed around said two pulleys in a manner whereby it would sequentially engage all of the grooves in both pulleys and terminate in said pair of cable runs from the pair of outermost main pulley grooves.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |