Vehicle braking system
Abstract
Abstract A PRESSURE RATIO CHANGING DEVICE FOR A SERVOMOTOR OF A POWER BRAKING SYSTEM. A FIRST PISTON SECURED TO THE HUB MEMBER OF THE MOVABLE WALL OF THE SERVOMOTOR EXTENDS INTO THE HYDRAULIC CHAMBER OF A MASTER CYLINDER. A SECOND PISTON LOCATED IN A BORE WITHIN THE FIRST PISTON ALSO EXTENDS INTO THE HYDRAULIC CHAMBER. DEPRESSION OF AN ACTUATOR BY AN OPERATOR WILL OPEN A VALVE IN THE HUB MEMBER TO CREATE A PRESSURE DIFFERENTIAL ACROSS THE MOVABLE WALL. AS THE WALL MOVES, THE FIRST PISTON WILL ENERGIZE THE MASTER CYLINDER TO PRESSURIZE THE HYDRAULIC FLUID IN THE BRAKING SYSTEM. FURTHER DEPRESSION OF THE ACTUATOR BY THE OPERATOR WILL MOVE THE SECOND PISTON TO ADD TO THE ENERGIZING FORCE OF THE FIRST PISTON. A REACTION MEMBER ADJACENT THE SECOND PISTON WILL SELECTIVELY POSITION THE MOVABLE WALL AND THE ACTUATOR IN PROPORTION TO AN INTERNAL REACTIVE BACK FORCE TO MAINTAIN EQUILIBRIUM WITHIN THE SYSTEM DURING ACTIVATION.
Inventors
- 👤 Delbert J Gardner
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |