Patent US1851947A successfully refreshed from Google Patents.
Patent US1851061A successfully refreshed from Google Patents.
US3221663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wash flow bearing system
Assignee: Chandler Evans Inc
•
Filing: 1964-05-20
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Granted: 1965-12-07
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Expires: 1984-05-20
Abstract
No abstract record available.
Inventors
- 👤 John J Schofield
- 👤 Francis P Schierberl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:31
CPC Classifications
F; F04; F04C; F04C13/00; F04C13/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A GEAR-TYPE FUEL PUMP WHICH COMPRISES A FUEL INLET, A PUMPING CHAMBER, A FUEL FILTER CHARACTER, AND A FUEL DISCHARGE OUTLET, ALL CONNECTED IN FLOW SERIES: A PAIR OF INTERMESHING, PUMPING GEARS, EACH JOURNALED IN A PAIR OF OPPOSITELY DISPOSED FUEL PRESSURE-LOADED BEARINGS MOUNTED IN SAID PUMPING CHAMBER; A WASH-FLOW FILTER HAVING A TUBULAR FILTERING ELEMENT IN SAID FILTER CHAMBER; MEANS FOR PASSING THROUGH SAID FILTERING ELEMENT A MINOR FRACTION OF THE FUEL FLOWING THROGH SAID FILTER; AND MEANS FOR FEEDING SAID FRACTIUON OF FUEL, UNDER SUBSTANTIALLY PUMP DISCHARGE PRESSURE, TO AND THROUGH THE INTERSPACES BETWEEN THE SIDES OF EACH GEAR AND THE ADJACENT END OF EACH
Claim 2
Dependent Claim
108 words
IN A GEAR-TYPE FUEL PUMP WHICH COMPRISES A FUEL INLET, A PUMPING CHAMBER, A FUEL FILTER CHARACTER, AND A FUEL DISCHARGE OUTLET, ALL CONNECTED IN FLOW SERIES: A PAIR OF INTERMESHING, PUMPING GEARS, EACH JOURNALED IN A PAIR OF OPPOSITELY DISPOSED FUEL PRESSURE-LOADED BEARINGS MOUNTED IN SAID PUMPING CHAMBER; A WASH-FLOW FILTER HAVING A TUBULAR FILTERING ELEMENT IN SAID FILTER CHAMBER; MEANS FOR PASSING THROUGH SAID FILTERING ELEMENT A MINOR FRACTION OF THE FUEL FLOWING THROGH SAID FILTER; AND MEANS FOR FEEDING SAID FRACTIUON OF FUEL, UNDER SUBSTANTIALLY PUMP DISCHARGE PRESSURE, TO AND THROUGH THE INTERSPACES BETWEEN THE SIDES OF EACH GEAR AND THE ADJACENT END OF EACH
References Cited (Backward Citations)
US1451859A
Cited
US1795579A
Cited
US2243585A
Cited
US2276107A
Cited
US2400485A
Cited
US2446194A
Cited
US2676548A
Cited
US2885965A
Cited
US2870720A
Cited
US2891483A
Cited
US2980028A
Cited
US3011448A
Cited
US2997960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |