US3587233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for maintaining the pressure at a hydraulic accumulator
Assignee: Individual
•
Filing: 1969-04-03
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Granted: 1971-06-28
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Expires: 1989-04-03
Abstract
Abstract A SOURCE OF PRESSURE FLUID IS CONNECTED WITH A HYDRAULIC ACCUMULATOR TO MAINTAIN THE PRESSURE REQUIRED FOR PRESSURE CONSUMING OPERATIONS OF A HYDRAULICALLY DRIVEN MACHINE PART. THE FLOW OF FLUID FROM THE SOURCE, SUCH AS A PUMP, TO THE ACCUMULATOR IS CONTROLLED DEPENDING ON THE OPERATIONS OF THE MACHINE PART.
Inventors
- 👤 Alfred Fischbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:36
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/76; B29C45/82; F; F15; F15B; F15B1/00; F15B1/02; F15B1/024; F15B1/027; F15B1/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |