Patent US3667778A successfully refreshed from Google Patents.
US3667778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antijack-knifing coupling device
Assignee: Self Energising Disc Brakes Ltd
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Filing: 1970-06-18
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Granted: 1972-06-06
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Expires: 1990-06-18
Abstract
Abstract A FIFTH WHEEL COUPLING IS PROVIDED FOR ARTICULATED VEHICLES WHICH INCLUDES MEANS FOR RESISTING "JACKKNIFE" MOVEMENT BETWEEN THE TRACTOR AND TRAILER UNITS OF THE VEHICLE. THE COUPLING EMBODIES A SUBSTANTIALLY STANDARD KING PIN ENGAGEABLE WITH A CONVENTIONAL FIFTH WHEEL. ROTATABLY MOUNTED ON THE KING PIN IS AN ANNULAR MEMBER WHICH CARRIES A TONGUE ENGAGEABLE IN THE SLOT IN THE FIFTH WHEEL. BRAKING MEANS ARE PROVIDED, ACTING BETWEEN THE ANNULAR MEMBER AND THE TRAILER UNIT FOR RESISTING JACKKNIFE MOVEMENT OF THE VEHICLE.
Inventors
- 👤 Freiderick John Charles Hope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:34
CPC Classifications
B; B60; B60T; B60T1/00; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0871; B62D53/0878
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |