Step ratio parking brake control
Abstract
Abstract A VARIABLE RATIO FORCE MULTIPLYING PARKING BRAKE CONTROL MECHANISM WHEREIN A PEDAL LEVER HAVING OUTPUT MEANS ATTACHED THERETO IS PIVOTALLY MOUNTED ON A MAIN LEVER WHICH IS IN TURN PIVOTALLY MOUNTED ON A STATIONARY BRACKET. A PRETENSIONED SPRING HOLDS THE MAIN LEVER WHILE THE PEDAL LEVER PIVOTS THEREON TO PROVIDE RELATIVELY LOW FORCE MULTIPLICATION FOR FAST TAKEUP OF THE SLACK IN THE BRAKE SYSTEM. THE REACTION OF THE BRAKE CABLE TENSIONING FORCE CAUSES THE PRETENSIONED SPRING TO YIELD, AND THE RESULTING PIVOTAL MOVEMENT OF THE MAIN LEVER ENGAGES A CLUTCH ACTING BETWEEN THE MAIN LEVER AND THE PEDEL LEVER SO THAT UPON FURTHER PEDAL LEVER MOVEMENT THE PEDAL LEVER AND THE MAIN LEVER ROTATE UNITARILY ABOUT THE MAIN LEVER PIVOT TO PROVIDE CONTINUOUSLY INCREASING FORCE MULTIPLICATION.
Inventors
- 👤 Donald M Flory
- 👤 Elton S Moyer
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |