Fluid pressure proportioning unit
Abstract
Abstract A FLUID PROPORTIONING UNIT FOR MOTOR VEHICLE BRAKING SYSTEM IN WHICH THE PRESSURE OUTPUT OF A VALVE MEMBER OPERATES THE FRONT WHEEL BRAKES AND ACTS THROUGH A LEVER WHICH IS PIVOTED ON A FULCRUM MECHANISM TO OPERATE ANOTHER VALVE MEMBER WHICH CONTROLS THE REAR WHEEL BRAKES. THE FULCRUM MECHANISM INCLUDES A CAM HAVING A CAM SURFACE CONSTRUCTED SO THAT THE POINT OF CONTACT BETWEEN THE CAM AND THE LEVER MIGRATES ACROSS THE LEVER AS THE LEVER ROTATES TO PROGRESSIVELY DECREASE THE PROPORTION OF FRONT BRAKE PRESSURE WHICH IS TRANSMITTED TO THE REAR BRAKES IN ORDER TO COMPENSATE FOR THE DYNAMIC WEIGHT TRANSFER CHARACTERISTICS OF THE VEHICLE. A PISTON CONTROLLED BY THE PRESSURE IN A LOAD LEVELER SYSTEM ROTATES THE CAM PRIOR TO BRAKE ACTUATION TO ADJUST THE PROPORTIONING UNIT ACCORDING TO THE VEHICLE STATIC LOAD.
Inventors
- 👤 Daniel A Armstrong
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |