US3823577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible coupling
Assignee: Pyramid Ind Inc
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Filing: 1973-04-17
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Granted: 1974-07-16
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Expires: 1993-04-17
Abstract
Abstract A flexible coupling including a flexible polyurethane elastomer central member bonded to the face of rigid driving and driven hubs formed, in one embodiment, of a polycarbonate material and a method of making the flexible coupling.
Inventors
- 👤 T Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:53
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/72; F16D3/74; Y; Y10; Y10S; Y10S464/00; Y10S464/902; Y10S464/903; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
23 words
A flexible drive coupling as defined in claim 1 wherein said hubs and connecting polyurethane member are annular and comprise a cylindrical coupling.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |