Control valve
Abstract
Abstract A CONTROL VALVE FOR USE IN A HYDRAULIC BRAKE SYSTEM IS PROVIDED WITH A SPRING LOADED PISTON WHICH CARRIES A PROPORTIONING MEMBER. THE PROPORTIONING MEMBER IS ACTUATED IN RESPONSE TO SUPPLIED FLUID PRESSURE IN EXCESS OF A PREDETERMINED VALUE TO EFFECT THE APPLICATION OF A PROPORTIONALLY REDUCED FLUID PRESSURE THROUGH THE CONTROL VALVE, AND THE PISTON IS MOVABLE AGAINST ITS SPRING IN RESPONSE TO ANOTHER PREDETERMINED VALUE IN EXCESS OF THE FIRST NAMED PREDETERMINED VALUE ACTING THEREON TO INCREASE THE APPLIED FLUID PRESSURE. THE ACTUATION OF THE PROPORTIONING MEMBER IS THEREAFTER RESUMED IN RESPONSE TO A THIRD PREDETERMINED VALUE PREDETERMINATELY IN EXCESS OF THE OTHER PREDETERMINED VALUE OF THE SUPPLIED FLUID PRESSURE ACTING THEREON TO FURTHER EFFECT PROPORTIONALLY REDUCED INCREASES IN THE APPLIED FLUID PRESSURE.
Inventors
- 👤 Stanley L Stokes
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |