US3788155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced molded plastic pulleys
Assignee: Individual
•
Filing: 1972-03-27
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Granted: 1974-01-29
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Expires: 1992-03-27
Abstract
Abstract Pulleys made of plastic material may be improved in their stress - and heat resistance by embedding within the body of the pulley and parallel to the faces thereof a diaphragm suitably made of metal, fiber glass or mixtures thereof.
Inventors
- 👤 V Cigala
- 👤 E Bertinetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:36
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/36; F16H55/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A pulley comprising: a. a diaphragm including a pair of parallel, metallic plates rigidly secured to each other, a central opening extending through said plates with the axis of said opening being substantially perpendicular to the planes of said plates and a peripheral flange integral with the radially outer end of each said plate, said flanges being at an angle with respect to the planes of said plates and with respect to each other for defining, in combination, a peripheral, substantially V-shaped groove; b. a metallic bushing mounted in said opening and rigidly secured to said diaphragm; and c. a plastic layer covering the oppositely directed surfaces of said diaphragm, the outwardly directed surfaces of said flanges and the outside surface of said bushing whereby the confronting surfaces of said V-shaped groove are exposed.
Claim 2
Dependent Claim
134 words
A pulley comprising: a. a diaphragm including a pair of parallel, metallic plates rigidly secured to each other, a central opening extending through said plates with the axis of said opening being substantially perpendicular to the planes of said plates and a peripheral flange integral with the radially outer end of each said plate, said flanges being at an angle with respect to the planes of said plates and with respect to each other for defining, in combination, a peripheral, substantially V-shaped groove; b. a metallic bushing mounted in said opening and rigidly secured to said diaphragm; and c. a plastic layer covering the oppositely directed surfaces of said diaphragm, the outwardly directed surfaces of said flanges and the outside surface of said bushing whereby the confronting surfaces of said V-shaped groove are exposed.
Claim 3
Dependent Claim
25 words
The pulley in accordance with claim 1 wherein the periphery of each said flange includes an outwardly directed lip that is captured in said plastic.
Claim 4
Dependent Claim
22 words
The pulley in accordance with claim 1 wherein said bushing includes a radially extending projection that is embedded in said plastic layer.
Claim 5
Dependent Claim
21 words
The pulley in accordance with claim 1 wherein said plastic layer extends radially beyond the periphery of one of said flanges.
Claim 6
Dependent Claim
27 words
The pulley in accordance with claim 4 wherein said portion of said plastic layer extending radially beyond said flange includes a plurality of generally axially oriented paddles.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |