US3194167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Lapp Insulator Co LLC
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Filing: 1964-01-22
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Granted: 1965-07-13
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Expires: 1984-01-22
Abstract
No abstract record available.
Inventors
- 👤 Lawrence F Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:28
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0034; F04C2/00; F04C2/30; F04C2/32; F16; F16J; F16J15/00; F16J15/50; F16J15/52; F16J15/525
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A ROTARY PISTON PUMP HAVING A HOUSING FORMED TO PROVIDE A GENERALLY CYLINDRICAL PUMP CHAMBER IN COMMUNCATION WITH INLET AND OUTLET OPENINGS AND A GENERALLY CYLINDRICAL IMPELLER OF SMALLER DIAMETER THAN SAID CHAMBER THAT IS DRIVEN BY AN ECCENTRIC DRIVE IN A REVOLVING MOTION WITHIN SAID CHAMBER TO FORCE FLUID FROM SAID INLET TO SAID OUTLET, THE IMPROVEMENT COMPRISING: FORMATION OF SAID IMPELLER AS A PLURALITY OF ECCENTRIC MEMBER AT LEAST TWO OF WHICH ARE ROTATABLE RELATIVE TO EACH OTHER; AND A FLUID-IMPERVIOUS WEB OF FLEXIBLE MATERIAL CONNECTING AN INNER ONE OF SAID IMPELLER MEMBERS TO SAID HOUSING IN FLUID-TIGHT FASHION, SAID WEB PREVENTING ESCAPE OF SAID FLUID FROM SAID CHAMBER AND SUBSTANTIALLY PREVENTING ROTATIONAL MOTION OF SAID INNER IMPELLER MEMBER RELATIVE TO SAID HOUSING, AN OUTER ONE OF SAID IMPELLER MEMBERS BEING ROTATABLE A SMALL AMOUNT RELATIVE TO SAID HOUSING.
Claim 2
Dependent Claim
142 words
IN A ROTARY PISTON PUMP HAVING A HOUSING FORMED TO PROVIDE A GENERALLY CYLINDRICAL PUMP CHAMBER IN COMMUNCATION WITH INLET AND OUTLET OPENINGS AND A GENERALLY CYLINDRICAL IMPELLER OF SMALLER DIAMETER THAN SAID CHAMBER THAT IS DRIVEN BY AN ECCENTRIC DRIVE IN A REVOLVING MOTION WITHIN SAID CHAMBER TO FORCE FLUID FROM SAID INLET TO SAID OUTLET, THE IMPROVEMENT COMPRISING: FORMATION OF SAID IMPELLER AS A PLURALITY OF ECCENTRIC MEMBER AT LEAST TWO OF WHICH ARE ROTATABLE RELATIVE TO EACH OTHER; AND A FLUID-IMPERVIOUS WEB OF FLEXIBLE MATERIAL CONNECTING AN INNER ONE OF SAID IMPELLER MEMBERS TO SAID HOUSING IN FLUID-TIGHT FASHION, SAID WEB PREVENTING ESCAPE OF SAID FLUID FROM SAID CHAMBER AND SUBSTANTIALLY PREVENTING ROTATIONAL MOTION OF SAID INNER IMPELLER MEMBER RELATIVE TO SAID HOUSING, AN OUTER ONE OF SAID IMPELLER MEMBERS BEING ROTATABLE A SMALL AMOUNT RELATIVE TO SAID HOUSING.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |