US3662568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible coupling
Assignee: Pacific Metals Co Ltd
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Filing: 1971-02-16
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Granted: 1972-05-16
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Expires: 1991-02-16
Abstract
Abstract In a flexible coupling composed of two coupling halves and an intermediate elastic ring inserted between the two coupling halves, the improvements that each of said two coupling halves has on its inside surface claws of height equivalent to half of the thickness of said intermediate ring and that said intermediate ring is provided with plurality of openings of same shape as the cross section of said claws.
Inventors
- 👤 Takeshiro Kashima
- 👤 Isamu Onaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:07
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/72; F16D3/74
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
In a flexible coupling composed of two coupling halves and an intermediate elastic ring inserted between the two coupling halves, the improvements that each of said two coupling halves has on its inside surface claws of height equivalent to half of the thickness of said intermediate ring and that said intermediate ring is provided with plurality of openings of same shape as the cross section of said claws.
Claim 2
Dependent Claim
68 words
In a flexible coupling composed of two coupling halves and an intermediate elastic ring inserted between the two coupling halves, the improvements that each of said two coupling halves has on its inside surface claws of height equivalent to half of the thickness of said intermediate ring and that said intermediate ring is provided with plurality of openings of same shape as the cross section of said claws.
Claim 3
Dependent Claim
32 words
A flexible coupling according to claim 1 in which four claws are provided equally spaced from each other around the center of the inside surface of each of said two coupling halves.
Claim 4
Dependent Claim
30 words
A flexible coupling according to claim 1 in which the elastic intermediate ring is of material selected from group consisting of polyurethane rubber, urethane rubber, nitrile rubber and natural rubber.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |