Master cylinders
Abstract
Abstract A MASTER CYLINDER FOR FLUID PRESSURE BRAKING SYSTEMS HAVING AT LEAST ONE VALVE DEVICE ARRANGED INSIDE A HOLLOW PLUG SCREWED INTO A CUP SHAPED BOSS FORMED ON THE CYLINDER BODY. THE INSIDE OF THE VALVE DEVICE IS CONNECTED THROUGH A HOLE WITH A COMPRESSION CHAMBER DEFINED AT LEAST AT ONE END BY A PISTON SLIDABLE INSIDE THE CYLINDER. THE SAID VALVE DEVICE COMPRISES AN ANNULAR VALVE SEAT FORMED INSIDE THE HOLLOW PLUG AND A VALVE MEMBER CONSTANTLY URGED AGAINST SAID SEAT BY A BIASSING SPRING. THE VALVE MEMBER HAS AN EXTENSION PROTRUDING INSIDE THE HOLE CONNECTING THE BOSS WITH THE RESPECTIVE COMPRESSION CHAMBER, AND THE PISTON CARRIES MEANS, WHICH MAY BE INTEGRAL THEREWITH, WHICH ACT ON THE EXTENSION SO AS TO OPEN THE PASSAGE THROUGH THE VALVE SEAT WHEN THE SAID PISTON IS HELD IN ITS INOPERATIVE POSITION UNDER THE ACTION OF REACTION SPRING MEANS.
Inventors
- 👤 Enrico Rivetti
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |