US3359862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston locking means
Assignee: McDowell-Wellman Engineering Co
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Filing: 1966-02-25
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Granted: 1967-12-26
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Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jack L Modrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:39
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A FLUID-OPERATED CYLINDER HAVING A PISTON SLIDABLY MOUNTED THEREIN FOR MOVEMENT BETWEEN FIRST AND SECOND POSITIONS WITHIN SAID CYLINDER, SAID PISTON DIVIDING SAID CYLINDER INTO FIRST AND SECOND PRESSURE CHAMBERS, FIRST AND SECOND CONDUIT MEANS RESPECTIVELY CONNECTED TO AND IN FLUID COMMUNICATION WITH SAID FIRST AND SECOND PRESSURE CHAMBERS, CONNECTING MEANS FOR SELECTIVELY AND ALTERNATELY CONNECTING SAID FIRST AND SECOND CONDUITS TO A PRESSURE LINE AND AN EXHAUST PORT SO THT WHEN ONE OF SAID CONDUITS IS CONNECTED TO THE PRESSURE LINE, THE OTHER CONDUIT IS CONNECTED TO THE EXHAUST PORT, MEANS OPERATIVE TO LOCK THE PISTON IN A PRESELECTED POSITION WITHIN THE CYLINDER, MEANS FOR OPERATING SAID LOCKING MEANS ALTERNATELY INTO AND OUT OF LOCKING RELATIONSHIP WITH SAID PISTON, SAID CONNECTING MEANS INCLUDING MEANS OPERABLE ONLY AFTER THE LOCKING MEANS HAS BEEN OPERATED TO UNLOCK THE PISTON FOR CONNECTING THE FIRST PRESSURE CHAMBER TO THE
Claim 2
Dependent Claim
146 words
A FLUID-OPERATED CYLINDER HAVING A PISTON SLIDABLY MOUNTED THEREIN FOR MOVEMENT BETWEEN FIRST AND SECOND POSITIONS WITHIN SAID CYLINDER, SAID PISTON DIVIDING SAID CYLINDER INTO FIRST AND SECOND PRESSURE CHAMBERS, FIRST AND SECOND CONDUIT MEANS RESPECTIVELY CONNECTED TO AND IN FLUID COMMUNICATION WITH SAID FIRST AND SECOND PRESSURE CHAMBERS, CONNECTING MEANS FOR SELECTIVELY AND ALTERNATELY CONNECTING SAID FIRST AND SECOND CONDUITS TO A PRESSURE LINE AND AN EXHAUST PORT SO THT WHEN ONE OF SAID CONDUITS IS CONNECTED TO THE PRESSURE LINE, THE OTHER CONDUIT IS CONNECTED TO THE EXHAUST PORT, MEANS OPERATIVE TO LOCK THE PISTON IN A PRESELECTED POSITION WITHIN THE CYLINDER, MEANS FOR OPERATING SAID LOCKING MEANS ALTERNATELY INTO AND OUT OF LOCKING RELATIONSHIP WITH SAID PISTON, SAID CONNECTING MEANS INCLUDING MEANS OPERABLE ONLY AFTER THE LOCKING MEANS HAS BEEN OPERATED TO UNLOCK THE PISTON FOR CONNECTING THE FIRST PRESSURE CHAMBER TO THE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |