Hydraulic control system for brakes,clutches and the like
Abstract
Abstract A PAIR OF HYDRAYLIC LOADS IN THE FORM OF CLUTCHES AND/OR BRAKES ARE CONTROLLED BY A COMMON VALVE HAVING SEPARATE INLET PORTS FOR HIGH-PRESSURE FLUID AND ASSOCIATED OUTLET PORTS RESPECTIVELY CONNECTED TO THESE LOADS, EACH INLET PORT COMMUNICATING WITH ITS ASSOCIATED OUTLET PORT IN AN INITIAL POSITION OF A SLIDER WHICH, IN RESPONSE TO PRESSURE BUILDUP IN THE FIRST OUTLET PORT, SHIFTS INTO AN ALTERNATE POSITION IN WHICH THE FLUID SUPPLY TO THE FIRST LOAD IS REDUCED AND THE TWO LEADS ARE INTERCONNECTED VIA A PATH ONLY ONLY IN THE ALTERNATE SILDER POSITON, THIS SHIFT OCCURS AGAINST A BIASING FORCE OF A SPRING BEARING UPON A PISTON WHICH IS DISPLACEBLY BY HYDRAULIC FLUID FROM THE FIRST OUTLET PORT, DELIVERED THOURGH A CONSTRICTED PASSAGE, TO AUGMENT THE BIASING FORCE SO AS TO RE-ESTABLISH THE INITIAL POSITION AFTER A FURTHER PRESSURE RISE AT THE FIRST LOAD THEREBY ADMITTING FLUID TO BOTH LOADS AT SUBSTANTIALLY THE PRESSURE PREVAILING AT THE TWO INLET PORTS.
Inventors
- 👤 Hansjoerg Dach
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |