US3196755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control system for loadhandling apparatus
Assignee: Doosan Bobcat North America Inc
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Filing: 1962-12-14
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Granted: 1965-07-27
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Expires: 1982-12-14
Abstract
No abstract record available.
Inventors
- 👤 Willard L Chichester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:18
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/01; B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/20; B66F9/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
IN A FLOW CONTROL SYYSTEM FOR A LOAD-HANDLING APPARATUS HAVING A PLURALITY OF PISTON AND CYLINDER UNITS, THE PISTONS OF WHICH ARE ACTUATED AWAY FROM ONE SET OF ENDS OF THE CYLINDERS WITH LOAD ASSISTANCE AND ACTUATED AWAY FROM THE OPPOSITE SET OF ENDS OF SAID CYLINDERS AGAINST LOAD RESISTANCE, MEANS FOR CONNECTING EITHER SET OF ENDS OF SAID CYLINDERS WITH A SOURCE OF FLUID UNDER PRESSURE AND FOR EXHAUSTING FLUID FROM EITHER SET OF ENDS OF SAID CYLINDERS IN CORRELATED IN-ONE-END-OUT-THE-OTHEREND MANNER, SAID MEANS INCLUDING A SINGLE VALVE, A VALVE SEAT, MEANS BIASING AND VALVE INTO FLUID SEALING RELATION WITH SAID VALVE SEAT, SAID VALVE IN SAID SEALING RELATION BLOCKING EXHAUST FROM SAID OTHER SET OF ENDS, AND BEING RESPONSIVE TO THE PRESSURE IN SAID ONE SET OF ENDS TO ALLOW THE EXHAUST OF FLUID FROM SAID OTHER SET OF ENDS ONLY AFTER BUILD UP OF PREDETERMINED PRESSURE IN SAID ONE SET OF ENS TO PREVENT CAVITATION IN SAID ONE SET OF ENDS.
Claim 2
Dependent Claim
164 words
IN A FLOW CONTROL SYYSTEM FOR A LOAD-HANDLING APPARATUS HAVING A PLURALITY OF PISTON AND CYLINDER UNITS, THE PISTONS OF WHICH ARE ACTUATED AWAY FROM ONE SET OF ENDS OF THE CYLINDERS WITH LOAD ASSISTANCE AND ACTUATED AWAY FROM THE OPPOSITE SET OF ENDS OF SAID CYLINDERS AGAINST LOAD RESISTANCE, MEANS FOR CONNECTING EITHER SET OF ENDS OF SAID CYLINDERS WITH A SOURCE OF FLUID UNDER PRESSURE AND FOR EXHAUSTING FLUID FROM EITHER SET OF ENDS OF SAID CYLINDERS IN CORRELATED IN-ONE-END-OUT-THE-OTHEREND MANNER, SAID MEANS INCLUDING A SINGLE VALVE, A VALVE SEAT, MEANS BIASING AND VALVE INTO FLUID SEALING RELATION WITH SAID VALVE SEAT, SAID VALVE IN SAID SEALING RELATION BLOCKING EXHAUST FROM SAID OTHER SET OF ENDS, AND BEING RESPONSIVE TO THE PRESSURE IN SAID ONE SET OF ENDS TO ALLOW THE EXHAUST OF FLUID FROM SAID OTHER SET OF ENDS ONLY AFTER BUILD UP OF PREDETERMINED PRESSURE IN SAID ONE SET OF ENS TO PREVENT CAVITATION IN SAID ONE SET OF ENDS.
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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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |