Patent US3968701A successfully refreshed from Google Patents.
US3968701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive motion belt with elastic teeth
Assignee: Tsubakimoto Chain Co
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Filing: 1975-01-10
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Granted: 1976-07-13
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Expires: 1995-01-10
Abstract
Abstract A positive motion belt transmission having an endless elastic toothed belt disposed in power transmitting engagement with a toothed wheel. The teeth on the wheel have convex surfaces adapted for engagement with the teeth on the belt. The teeth on the belt have concave surfaces which engage the convex surfaces on the teeth of the wheel to decrease the contact stress between the teeth during transmission of power between the wheel and the belt.
Inventors
- 👤 Masao Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:51
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/02; F16H7/023; F16G; F16G1/00; F16G1/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
In a positive motion endless belt having elastic teeth, said teeth having side faces adapted for engagement with a toothed wheel, comprising the improvement wherein the side faces are formed by a concave involute curve.
Claim 2
Dependent Claim
35 words
In a positive motion endless belt having elastic teeth, said teeth having side faces adapted for engagement with a toothed wheel, comprising the improvement wherein the side faces are formed by a concave involute curve.
Claim 3
Dependent Claim
25 words
In a belt according to claim 1, wherein the adjacent teeth are separated by flat bottom lands, and wherein the teeth have flat top lands.
Claim 4
Dependent Claim
36 words
In a belt according to claim 2, wherein the concave involute curve forming each side face extends through substantially the full length of the side face from the adjacent top land to the adjacent bottom land.
Claim 5
Dependent Claim
65 words
In a positive motion belt transmission having an endless elastic toothed belt disposed in power transmitting engagement with a toothed wheel, comprising the improvement wherein the teeth on the belt have concave involute side faces which engage convex involute side surfaces on the teeth of the wheel to decrease the contact stress between the teeth during transmission of power between the wheel and the belt.
Claim 6
Dependent Claim
65 words
In a positive motion belt transmission having an endless elastic toothed belt disposed in power transmitting engagement with a toothed wheel, comprising the improvement wherein the teeth on the belt have concave involute side faces which engage convex involute side surfaces on the teeth of the wheel to decrease the contact stress between the teeth during transmission of power between the wheel and the belt.
Claim 7
Dependent Claim
48 words
In a belt transmission according to claim 4, wherein the adjacent teeth on the belt are separated by substantially flat bottom lands, wherein the top lands of the belt teeth are substantially flat, and wherein the side faces diverge with respect to one another as they extend inwardly.
Claim 8
Dependent Claim
102 words
In a belt transmission according to claim 5, wherein the adjacent teeth on the wheel are separated by substantially flat bottom lands, wherein the teeth of the wheel also have substantially flat top lands, wherein the convex involute side surfaces of the teeth on the gear extend throughout substantially the full length of the side surfaces from the adjacent top land to the adjacent bottom land, and wherein the concave involute curve forming each side face of the teeth on the belt extends throughout substantially the full length of the side face from the adjacent top land to the adjacent bottom land.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |