US3276330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas pressure to liquid pressure converting systems
Assignee: Individual
•
Filing: 1963-09-03
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Granted: 1966-10-04
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Henry H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:23
CPC Classifications
F; F15; F15B; F15B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A DEVICE FOR PUTTING LIQUID UNDER PRESSURE IN A MANNER SUITABLE TO OPERATE A HYDRAULIC CYLINDER BY USING A GAS UNDER PRESSURE HAVING, A PAIR OF CHAMBERS, EACH CONTAINING SOME LIQUID AND SOME GAS, MEANS OF COMMUNICATION FROM THE BOTTOM OF ONE CHAMBER TO ONE SIDE OF THE HYDRAULIC SYSTEM AND FROM THE BOTTOM OF THE OTHER CHAMBER TO THE OTHER SIDE OF THE HYDRAULIC SYSTEM, MEANS OF SELECTING COMMUNICATION FROM A GAS UNDER PRESSURE TO THE TOP OF EITHER CHAMBER AND COMMUNICATION WITH ATMOSHPHERE TO THE TOP OF THE OTHER CHAMBER, MEANS CONNECTING LIQUID TO A CHAMBER TO ADD LIQUID TO SAID CHAMBER WHEN THE LEVEL IN THAT CHAMBER DROPS BELOW A PRESET LEVEL, WITH MEANS OF ADJUSTING SAID PRESET LEVEL IN EACH CHAMBER.
Claim 2
Independent Claim
125 words
A DEVICE FOR PUTTING LIQUID UNDER PRESSURE IN A MANNER SUITABLE TO OPERATE A HYDRAULIC CYLINDER BY USING A GAS UNDER PRESSURE HAVING, A PAIR OF CHAMBERS, EACH CONTAINING SOME LIQUID AND SOME GAS, MEANS OF COMMUNICATION FROM THE BOTTOM OF ONE CHAMBER TO ONE SIDE OF THE HYDRAULIC SYSTEM AND FROM THE BOTTOM OF THE OTHER CHAMBER TO THE OTHER SIDE OF THE HYDRAULIC SYSTEM, MEANS OF SELECTING COMMUNICATION FROM A GAS UNDER PRESSURE TO THE TOP OF EITHER CHAMBER AND COMMUNICATION WITH ATMOSHPHERE TO THE TOP OF THE OTHER CHAMBER, MEANS CONNECTING LIQUID TO A CHAMBER TO ADD LIQUID TO SAID CHAMBER WHEN THE LEVEL IN THAT CHAMBER DROPS BELOW A PRESET LEVEL, WITH MEANS OF ADJUSTING SAID PRESET LEVEL IN EACH CHAMBER.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |