Patent US3155041A successfully refreshed from Google Patents.
US3155041A
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US
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Pressure apparatus
Assignee: Mansfield Green Inc
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Filing: 1963-05-16
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Granted: 1964-11-03
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Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Donald C Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:46
CPC Classifications
G; G01; G01L; G01L27/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PRESSURE PUMP APPARATUS COMPRISING, CLOSED CIRCUIT FOR CIRCULATION OF A PRESSURE FLUID, A RESERVOIR OF PRESSURE FLUID, A PUMP JOINED TO SAID RESERVOIR FOR FORWARDING SAID PRESSURE FLUID TO A PRESSURE POINT SUBJECT TO TESTING, A PUMPING PLUNGER IN SAID PUMP HAVING STEPWISE DECREASING DIAMETERS, A PUMP HOUSING CONFORMING TO SAID PLUNGER, ACCESS AND EXIT CONDUITS TO EACH STEPWISE SECTION OF SAID HOUSING, AN OUTLET CONDUIT CONNECTED TO SAID PUMP FOR CONDUCTING THE COMBINED FLOWS FROM EACH OF SAID SECTIONS AS A UNIT ENLARGED VOLUME TO SAID PRESSURE POINT, A MODIFIED CHECK VALVE IN EACH ACCESS CONDUIT, A MODIFIED CHECK VALVE IN THE OUTLET CONDUIT, MEANS FOR MANIPULATING DESIRED MODIFIED CHECK VALVES TO BY-PASS DESIRED PRESSURES TO OTHER PUMP SECTIONS.
Claim 2
Dependent Claim
121 words
A PRESSURE PUMP APPARATUS COMPRISING, CLOSED CIRCUIT FOR CIRCULATION OF A PRESSURE FLUID, A RESERVOIR OF PRESSURE FLUID, A PUMP JOINED TO SAID RESERVOIR FOR FORWARDING SAID PRESSURE FLUID TO A PRESSURE POINT SUBJECT TO TESTING, A PUMPING PLUNGER IN SAID PUMP HAVING STEPWISE DECREASING DIAMETERS, A PUMP HOUSING CONFORMING TO SAID PLUNGER, ACCESS AND EXIT CONDUITS TO EACH STEPWISE SECTION OF SAID HOUSING, AN OUTLET CONDUIT CONNECTED TO SAID PUMP FOR CONDUCTING THE COMBINED FLOWS FROM EACH OF SAID SECTIONS AS A UNIT ENLARGED VOLUME TO SAID PRESSURE POINT, A MODIFIED CHECK VALVE IN EACH ACCESS CONDUIT, A MODIFIED CHECK VALVE IN THE OUTLET CONDUIT, MEANS FOR MANIPULATING DESIRED MODIFIED CHECK VALVES TO BY-PASS DESIRED PRESSURES TO OTHER PUMP SECTIONS.
References Cited (Backward Citations)
US617135A
Cited
US867932A
Cited
US833457A
Cited
US1904531A
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FR656076A
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US2255984A
Cited
US2439796A
Cited
US2442058A
Cited
US2688231A
Cited
US2989001A
Cited
US2922373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |