Patent US3553978A successfully refreshed from Google Patents.
US3553978A
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Composite propeller shaft construction and method of making
Assignee: Motors Liquidation Co
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Filing: 1969-10-06
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Granted: 1971-01-12
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Expires: 1989-10-06
Abstract
Abstract A VEHICLE PROPELLER SHAFT INCLUDES A PAIR OF SPACED END MEMBERS HAVING INNER ENDS WITH CHARACTERIZED SURFACES. A LIGHT BUT STIFF CYLINDRICAL ARBOR, SUCH AS OF POLYURETHANE FOAM, CONNECTS THE END MEMBERS AND A TUBE FORMED OF HARDENED THERMOSETTING RESIN REINFORCED WITH FIBER GLASS FILAMENTS IF FORMED ON THE ARBOR AND INTERLOCKINGLY ENGAGES THE CHARACTERIZED SURFACES OF THE END MEMBERS. A METHOD OF FORMING SUCH A SHAFT INCLUDES STEPS OF FORMING A POLYURETHANE FOAM ARBOR BETWEEN THE END MEMBERS AND FORMING THE RESIN BONDED FIBER GLASS TUBE N PLACE OF THE ARBOR AND END MEMBERS.
Inventors
- 👤 Charles W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:26
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0046; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C53/68; B29C53/80; B29C53/82; B29C53/821; B29C53/822; F; F16; F16C; F16C3/00; F16C3/02; F16C3/026; B29L; B29L2031/00; B29L2031/06; B29L2031/748; B29L2031/75; F16C2326/00; F16C2326/01; F16C2326/06; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/20456
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |