Coupling for semitrailer units
Abstract
Abstract AN IMPROVED SEMITRAILER-CONVERTER DOLLY COUPLING ARRANGEMENT UTILIZING A WHEELED CONVERTER DOLLY HAVING A FIFTH WHEEL ROTATABLY MOUNTED THEREON, AND A SEMITRAILER HAVING A FIFTH WHEEL PLATE UNDER ITS FRONT END TO WHICH IS MOVABLY SECURED A RECTILINEAR COUPLING MEMBER ADAPTED TO BE SNUGLY RECEIVED WITHIN A COMPLEMENTARY COUPLING APERTURE OR RECESS IN SAID FIFTH WHEEL OF SAID DOLLY. THE CONVERTER DOLLY IS EMPLOYED TO CONNECT SAID SEMITRAILER IN A TANDEM ARRANGEMENT BEHIND A LEAD SEMITRAILER DRAWN BEHIND A TRACTOR. BRAKING MEANS SUPPORTED ON SAID DOLLY MAY BE SELECTIVELY OPERATED TO PREVENT ROTATION OF SAID FIFTH WHEEL, AND THUS OF THE FRONT END OF SAID SEMITRAILER RIGIDLY COUPLED THERETO, IN ORDER TO ASSIST IN CONTROLLING AND STEERING SAID SEMITRAILER.
Inventors
- 👤 Charles R Adams
Bibliographic Details
Claims Analysis
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |