US3154087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for purging a hydraulic system
Assignee: QUADRANT ENGINEERING Corp
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Filing: 1961-12-26
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Granted: 1964-10-27
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Richard C Beaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:19
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/044; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0419; Y10T137/4238; Y10T137/4245; Y10T137/4259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR PURGING A HYDRAULIC SYSTEM COMPRISING STEPS OF: PURGING THE HYDRAULIC SYSTEM WITH A CONDENSIBLE VAPOR OTHER THAN AIR UNTIL THE AIR IN THE SYSTEM IS REPLACED BY THE SAID VAPOR; PUMPING HYDRAULIC FLUID INTO SAID SYSTEM AT A PRESSURE SUFFICIENT TO CONDENSE SAID VAPOR TO A LIQUID WHICH MIXES WITH SAID HYDRAULIC FLUID; AND REPLACING SAID MIXTURE OF THE LIQUEFIED VAPOR AND HYDRAULIC FLUID WITH HYDRAULIC FLUID.
Claim 2
Dependent Claim
70 words
A PROCESS FOR PURGING A HYDRAULIC SYSTEM COMPRISING STEPS OF: PURGING THE HYDRAULIC SYSTEM WITH A CONDENSIBLE VAPOR OTHER THAN AIR UNTIL THE AIR IN THE SYSTEM IS REPLACED BY THE SAID VAPOR; PUMPING HYDRAULIC FLUID INTO SAID SYSTEM AT A PRESSURE SUFFICIENT TO CONDENSE SAID VAPOR TO A LIQUID WHICH MIXES WITH SAID HYDRAULIC FLUID; AND REPLACING SAID MIXTURE OF THE LIQUEFIED VAPOR AND HYDRAULIC FLUID WITH HYDRAULIC FLUID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |