Vibratory roller compacting apparatus and method
Abstract
Abstract A SELF-PROPELLED VIBRATORY MACHINE INCLUDING A FRAME RESILIENTLY MOUNTING A COMPACTING ROLLER FOR ROTATION, AND ECCENTRIC MEANS, ROTATABLE ABOUT THE ROLLER AXIS, FOR VIBRATING THE ROLLER. A VARIABLE SPEED HYDROSTATIC TRANSMISSION INCLUDING A REVERSIBLE, VARIABLE DISPLACEMENT PUMP IN CLOSED-LOOP FLUID COMMUNICATION WITH A FIXED DISPLACEMENT MOTOR IS IN CONTINUOUS DRIVING RELATIONSHIP WITH THE ECCENTRIC MEANS AND IS OPERABLE TO CONTROL THE SPEED AND DIRECTION OF ROTATION THEREOF. A CONTROL LINKAGE AUTOMATICALLY CORRELATES THE DIRECTION OF ROTATION OF ECCENTRIC MEANS WITH THE TRANSLATING DIRECTION OF TRAVEL OF THE MACHINE. POSITIVE BRAKING OF THE ECCENTRIC MEANS, IN APPROXIMATELY THREE REVOLUTIONS THEREOF, MINIMIZES THE PERIOD OF RESONANCE BETWEEN THE FRAME AND THE VIBRATING ROLLER.
Inventors
- 👤 John E Keppler
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |