Patent US3608433A successfully refreshed from Google Patents.
US3608433A
Expired / Lapsed
US
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Valve arrangement in the working pistion of a pressure-medium operating cylinder
Assignee: Daimler Benz AG
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Filing: 1969-04-11
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Granted: 1971-09-28
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Expires: 1989-04-11
Abstract
Abstract A VALVE MECHANISM ARRANGED IN AN OPERATING PISTON SLIDABLE WITHIN A CYLINDER, IN WHICH THE OPERATING PISTON IS PROVIDED WITH A VALVE CHANNEL FORMING A GUIDE PORTION, AND A VALVE PIN AXIALLY DISPLACEABLE IN THE GUIDE PORTION WHICH INCLUDES A CENTER SECTION ADAPTED TO BE GUIDED AND SEALED PRESSURE-TIGHT IN THE GUIDE PORTION AND END SECTIONS OF REDUCED CROSS SECTION WITH RESPECT TO THE CENTER SECTION.
Inventors
- 👤 Dirk Buisman
- 👤 Otto Lattner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:38
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/149; F15B15/1423; F15B15/1447
Claims Analysis
Total Claims: 0
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References 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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |