US4007644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt
Assignee: SCM Corp
•
Filing: 1975-10-20
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Granted: 1977-02-15
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Expires: 1995-10-20
Abstract
Abstract A power transmission drive belt having a plurality of equally spaced teeth of identical contour disposed along its length. The teeth include a crest with driving and trailing faces depending therefrom to a valley below. An apex is disposed on each tooth and in each valley to provide minimum engagement between the belt and a pulley, resulting in a quiet running power transmission drive system.
Inventors
- 👤 Ernest F. Weinberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:12
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/02; F16H7/023; F16G; F16G1/00; F16G1/28
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
50 words
A power transmitting toothed belt comprising: means to provide a single tooth driving contact between the toothed belt and the pulley; and means on the toothed belt including an apex between the teeth to provide minimal contact between the tooth valleys of the belt and the teeth of the pulley.
Claim 2
Dependent Claim
50 words
A power transmitting toothed belt comprising: means to provide a single tooth driving contact between the toothed belt and the pulley; and means on the toothed belt including an apex between the teeth to provide minimal contact between the tooth valleys of the belt and the teeth of the pulley.
Claim 3
Dependent Claim
30 words
A toothed belt as defined in claim 1 wherein said driving contact means includes the toothed belt formed to provide single toothed driving contact between the belt and the pulley.
Claim 4
Dependent Claim
63 words
A toothed belt as defined in claim 1 wherein the toothed belt includes teeth having a driving face and a trailing face and the pulley includes a plurality of teeth corresponding to said belt teeth and said single tooth engagement is defined by the engagement of said driving face of said single belt tooth and the driven face of said corresponding pulley tooth.
Claim 5
Dependent Claim
28 words
A toothed belt as defined in claim 3 wherein said minimal valley contact means of the toothed belt includes an apex in the tooth valleys of the belt.
Claim 6
Dependent Claim
35 words
A toothed belt as defined in claim 3 wherein said minimal contact means of the toothed belt includes an apex on said belt teeth for providing minimal tooth contact between the belt and the pulley.
Claim 7
Dependent Claim
42 words
A toothed belt as defined in claim 3 wherein the toothed belt includes an apex between the teeth of the toothed belt and an apex on the teeth of the toothed belt for providing minimal contact between the belt and the pulley.
Claim 8
Dependent Claim
20 words
A toothed belt as defined in claim 5 wherein said belt tooth apex is proximate said belt tooth driving face.
Claim 9
Dependent Claim
28 words
A toothed belt as defined in claim 6 wherein said apex in the tooth valleys is centrally disposed between said apexes on the teeth of the toothed belt.
Claim 10
Dependent Claim
34 words
A toothed belt as defined in claim 1 wherein said minimal valley contact means includes an apex between the teeth of the toothed belt for providing minimal contact between the belt and the pulley.
Claim 11
Dependent Claim
34 words
A toothed belt as defined in claim 1 wherein said minimal tooth contact means includes an apex on the teeth of the toothed belt for providing minimal contact between the pulley and the belt.
Claim 12
Dependent Claim
34 words
A toothed belt as defined in claim 1 wherein said minimal contact means includes an apex in the tooth valleys on the toothed belt and an apex on the teeth of the toothed belt.
Claim 13
Dependent Claim
51 words
A toothed belt as defined in claim 1 wherein said minimal tooth contact means includes the belt teeth having a driving face, a trailing face and a tooth crest therebetween, said tooth crest includes an apex proximate said driving face and decreases in height from said apex to said trailing face.
Claim 14
Dependent Claim
19 words
A pulley as defined in claim 12 wherein said tooth crest and said driving face define an acute angle.
Claim 15
Dependent Claim
77 words
An improved electric typewriter having a motor and a motor shaft extending therefrom, a toothed pulley fixed on the motor shaft and a function shaft for operating a typewriter function, the improvement comprising: a coupling between the motor and the function shaft comprising a toothed belt; and means on said toothed belt including an apex between the teeth to provide minimum contact between said toothed belt and the toothed pulley for minimizing the generation of audible noise.
Claim 16
Dependent Claim
77 words
An improved electric typewriter having a motor and a motor shaft extending therefrom, a toothed pulley fixed on the motor shaft and a function shaft for operating a typewriter function, the improvement comprising: a coupling between the motor and the function shaft comprising a toothed belt; and means on said toothed belt including an apex between the teeth to provide minimum contact between said toothed belt and the toothed pulley for minimizing the generation of audible noise.
Claim 17
Dependent Claim
28 words
An electric typewriter as defined in claim 14 wherein said minimum contact means further includes a driving engagement of less than all the teeth of said toothed belt.
Claim 18
Dependent Claim
26 words
An electric typewriter as defined in claim 14 wherein said minimum contact means includes a single tooth driving engagement between said toothed belt and the pulley.
Claim 19
Dependent Claim
71 words
An electric typewriter as defined in claim 16 wherein said toothed belt includes teeth having a driving face and a trailing face and a tooth crest therebetween, said tooth crest includes an apex proximate said driving face and the pulley includes a plurality of teeth corresponding to said belt teeth and said single tooth driving engagement is defined by said driving face of said single tooth and the corresponding pulley tooth.
Claim 20
Dependent Claim
23 words
An electric typewriter as defined in claim 14 wherein said minimum contact means includes an apex between the teeth on the toothed belt.
Claim 21
Dependent Claim
23 words
An electric typewriter as defined in claim 14 wherein said minimum contact means includes an apex on the teeth of the toothed belt.
Claim 22
Dependent Claim
31 words
An electric typewriter as defined in claim 14 wherein said means includes an apex between the teeth on the toothed belt and an apex on the teeth of the toothed belt.
Claim 23
Dependent Claim
20 words
An electric typewriter as defined in claim 17 wherein said belt tooth apex is proximate said belt tooth driving face.
Claim 24
Dependent Claim
27 words
An electric typewriter as defined in claim 21 wherein said apex between the teeth is centrally disposed between said apexes on the teeth of the toothed belt.
Claim 25
Dependent Claim
22 words
An electric typewriter as defined in claim 17 wherein said belt tooth crest and said tooth driving face define an acute angle.
Claim 26
Dependent Claim
21 words
A belt for transmitting power comprising: a plurality of teeth spaced along the periphery thereof; and an apex between the teeth.
Claim 27
Dependent Claim
21 words
A belt for transmitting power comprising: a plurality of teeth spaced along the periphery thereof; and an apex between the teeth.
Claim 28
Dependent Claim
17 words
A belt as defined in claim 24 wherein said tooth apex is proximate a belt tooth face.
Claim 29
Dependent Claim
16 words
A belt as defined in claim 25 wherein said belt tooth face is a driving face.
References Cited (Backward Citations)
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Cited
US2987932A
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Cited
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Cited
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Cited
US3744330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |