Patent US3256830A successfully refreshed from Google Patents.
US3256830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure compensator unloading control
Assignee: Individual
•
Filing: 1964-03-16
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Granted: 1966-06-21
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Expires: 1984-03-16
Abstract
No abstract record available.
Inventors
- 👤 Budzich Tadeusz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:08
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/30; F04B1/32; F04B1/324; F04B49/00; F04B49/002; F04B49/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A FLUID PRESSURE ENERGY TRANSLATING DEVICE COMPRISING PUMPING MECHANISM, FLOW CHANGING MEANS ARRANGED TO VARY THE CAPACITY OF SAID PUMPING MECHANISM, FIRST BIASING MEANS DISPOSED TO URGE SAID FLOW CHANGING MEANS TOWARD THE POSITION OF MAXIMUM FLOW, SECOND BIASING MEANS DISPOSED TO URGE SAID FLOW CHANGING MEANS TOWARD THE POSITION OF MINIMUM FLOW, PRESSURE RESPONSIVE CONTROL MEANS OPERATIVELY INTERCONNECTED WITH AT LEAST ONE OF SAID BIASING MEANS TO VARY THE CAPCITY OF SAID FLOW CHANGING MEANS TO MAINTAIN A RELATIVELY CONSTANT PRESELECTED CONTROL DISCHARGE PRESSURE OF THE DEVICE, AND UNLOADING MEANS TO SELECTIVELY ADJUST THE BIASING FORCE OF AT LEAST ONE OF SAID BIASING MEANS SO THAT THE BIASING FORCE OF THE FIRST BIASING MEANS IS LESS THAN THE BIASING FORCE OF THE SECOND BIASING MEANS TO THEREBY PERMIT SAID SECOND BIASING MEANS TO MOVE SAID FLOW CHANGING MEANS INTO THE MINIMUS FLOW POSITION WHREBY SAID DEVICE CAN BE MAINTAINED IN AN UNLOADED CONDITIONS OF MINIMUM FLOW AT MINIMUM DISCHARGE PRESSURE.
Claim 2
Dependent Claim
161 words
A FLUID PRESSURE ENERGY TRANSLATING DEVICE COMPRISING PUMPING MECHANISM, FLOW CHANGING MEANS ARRANGED TO VARY THE CAPACITY OF SAID PUMPING MECHANISM, FIRST BIASING MEANS DISPOSED TO URGE SAID FLOW CHANGING MEANS TOWARD THE POSITION OF MAXIMUM FLOW, SECOND BIASING MEANS DISPOSED TO URGE SAID FLOW CHANGING MEANS TOWARD THE POSITION OF MINIMUM FLOW, PRESSURE RESPONSIVE CONTROL MEANS OPERATIVELY INTERCONNECTED WITH AT LEAST ONE OF SAID BIASING MEANS TO VARY THE CAPCITY OF SAID FLOW CHANGING MEANS TO MAINTAIN A RELATIVELY CONSTANT PRESELECTED CONTROL DISCHARGE PRESSURE OF THE DEVICE, AND UNLOADING MEANS TO SELECTIVELY ADJUST THE BIASING FORCE OF AT LEAST ONE OF SAID BIASING MEANS SO THAT THE BIASING FORCE OF THE FIRST BIASING MEANS IS LESS THAN THE BIASING FORCE OF THE SECOND BIASING MEANS TO THEREBY PERMIT SAID SECOND BIASING MEANS TO MOVE SAID FLOW CHANGING MEANS INTO THE MINIMUS FLOW POSITION WHREBY SAID DEVICE CAN BE MAINTAINED IN AN UNLOADED CONDITIONS OF MINIMUM FLOW AT MINIMUM DISCHARGE PRESSURE.
References Cited (Backward Citations)
US2731569A
Cited
US3153899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |