Patent US3577794A successfully refreshed from Google Patents.
US3577794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated sprocket belt
Assignee: Individual
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Filing: 1968-06-17
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Granted: 1971-05-04
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Expires: 1988-06-17
Abstract
Abstract An endless belt for driving sprocket wheels is made of a plurality of layers, each layer having a butt joint which is spaced longitudinally of the belt from the joint of other layers. In one form the length of the joint is at least twice the width of the belt. The joints pass between adjacent ones of the sprocket holes. Other forms include reinforcing bands and belts which are thicker in the region between sprocket holes.
Inventors
- 👤 Franklin W Kerfoot Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:52
CPC Classifications
F; F16; F16G; F16G1/00; F16G1/28; G; G01; G01R; G01R1/00; G01R1/02; G01R1/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
An endless belt which comprises: a. at least two layers bonded together, the ends of each of said layers being disposed in proximity to one another to form a butt joint, the joint of one layer being spaced longitudinally of said belt from the joint of at least one of the other layers; and b. a plurality of sprocket holes formed in said layers, said butt joint passing between adjacent ones of said sprocket holes in the respective layers.
Claim 2
Dependent Claim
79 words
An endless belt which comprises: a. at least two layers bonded together, the ends of each of said layers being disposed in proximity to one another to form a butt joint, the joint of one layer being spaced longitudinally of said belt from the joint of at least one of the other layers; and b. a plurality of sprocket holes formed in said layers, said butt joint passing between adjacent ones of said sprocket holes in the respective layers.
Claim 3
Dependent Claim
28 words
The endless belt according to claim 1 wherein the length of said butt joints is at least twice the width of the layer in which it is formed.
Claim 4
Dependent Claim
26 words
The endless belt according to claim 1 wherein the free pitch-line lengths of the individual layers are different from the composite pitch-line length of the belt.
Claim 5
Dependent Claim
32 words
The endless belt according to claim 3 wherein the linear pitch of the sprocket holes of the composite belt is different from the pitch of the sprocket holes of each individual layer.
Claim 6
Dependent Claim
106 words
An endless belt which comprises: a. at least two layers bonded together, the ends of each of said layers being disposed in proximity to one another to form a butt joint, the joint of one layer being spaced longitudinally of said belt from the joint of at least one of the other layers, and b. a plurality of sprocket holes formed in said layers, the length of the sprocket holes formed in an outer layer being smaller than the length of the sprocket holes of an inner layer and the longitudinal centers of said sprocket holes of the respective layers are substantially aligned with one another.
Claim 7
Dependent Claim
106 words
An endless belt which comprises: a. at least two layers bonded together, the ends of each of said layers being disposed in proximity to one another to form a butt joint, the joint of one layer being spaced longitudinally of said belt from the joint of at least one of the other layers, and b. a plurality of sprocket holes formed in said layers, the length of the sprocket holes formed in an outer layer being smaller than the length of the sprocket holes of an inner layer and the longitudinal centers of said sprocket holes of the respective layers are substantially aligned with one another.
Claim 8
Dependent Claim
149 words
An endless belt which comprises: a. at least two layers bonded together, the ends of each of said layers being dispOsed in proximity to one another to form a butt joint, the joint of one layer being spaced longitudinally of said belt from the joint of at least one of the other layers and b. a plurality of sprocket holes formed in said layers, and c. at least two additional sprocket holed layers, each of which is disposed on the exposed external surface of respective ones of said two bonded layers, said additional layers being arranged to make contact with one another through portions of the sprocket holes in said first two layers, said contacting portions being located at least on the sides of said sprocket holes which normally are pressed against by the edges of the teeth of an associated sprocket in driving said belt in either direction.
Claim 9
Dependent Claim
149 words
An endless belt which comprises: a. at least two layers bonded together, the ends of each of said layers being dispOsed in proximity to one another to form a butt joint, the joint of one layer being spaced longitudinally of said belt from the joint of at least one of the other layers and b. a plurality of sprocket holes formed in said layers, and c. at least two additional sprocket holed layers, each of which is disposed on the exposed external surface of respective ones of said two bonded layers, said additional layers being arranged to make contact with one another through portions of the sprocket holes in said first two layers, said contacting portions being located at least on the sides of said sprocket holes which normally are pressed against by the edges of the teeth of an associated sprocket in driving said belt in either direction.
Claim 10
Dependent Claim
42 words
The endless belt according to claim 22 wherein said two additional layers overlay each side of said two layers, said additional layers being arranged to contact one another on all sides of the sprocket holes of said two layers which they overlap.
References Cited (Backward Citations)
US469778A
Cited
US2899242A
Cited
US1113438A
Cited
US2318287A
Cited
US2547220A
Cited
US2932340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |