US3327636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump or motor structure
Assignee: ASHTABULA BOW SOCKET CO
•
Filing: 1965-04-30
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Granted: 1967-06-27
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Howard M Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:51
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/06; F04C15/062; F04C2/00; F04C2/08; F04C2/10; F04C2/102; F05; F05C; F05C2225/00; F05C2225/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PUMP COMPRISING; AN OUTER INTERNALLY TOOTHED GEAR, AN INNER EXTERNALLY TOOTHED GEAR INSIDE SAID OUTER GEAR ECCENTRIC THERETO AND MESHING THEREWITH, NON-ROTATABLE HOUSING MEANS FITTED OVER AND ENCLOSING SAID GEARS, CIR CUMFERENTIALLY SPACED PORTS IN SAID HOUSING MEANS COMMUNICATING WITH SPACED REGIONS ABOUT THE PERIPHERY OF SAID OUTER GEAR, PASSAGE MEANS IN SAID OUTER GEAR COMMUNICATING THE PERIPHERY THEREOF WITH THE INSIDE OF THE OUTER GEAR FOR EXCHANGING FLUID BETWEEN SAID PORTS WHEN SAID GEARS ROTATE WITHIN SAID HOUSING MEANS, SAID HOUSING MEANS COMPRISING A PAIR OF CUP SHAPED MEMBERS FITTED OVER SAID GEARS FROM OPPOSITE SIDES AND MEETING IN EDGE TO EDGE RELATION ABOUT THE OUTER GEAR, A CUP-LIKE METAL CASING IN WHICH SAID HOUSING MEANS IS RECEIVED, AND A CLOSURE MEMBER IN THE OPEN SIDE OF SAID CASING.
Claim 2
Dependent Claim
131 words
A PUMP COMPRISING; AN OUTER INTERNALLY TOOTHED GEAR, AN INNER EXTERNALLY TOOTHED GEAR INSIDE SAID OUTER GEAR ECCENTRIC THERETO AND MESHING THEREWITH, NON-ROTATABLE HOUSING MEANS FITTED OVER AND ENCLOSING SAID GEARS, CIR CUMFERENTIALLY SPACED PORTS IN SAID HOUSING MEANS COMMUNICATING WITH SPACED REGIONS ABOUT THE PERIPHERY OF SAID OUTER GEAR, PASSAGE MEANS IN SAID OUTER GEAR COMMUNICATING THE PERIPHERY THEREOF WITH THE INSIDE OF THE OUTER GEAR FOR EXCHANGING FLUID BETWEEN SAID PORTS WHEN SAID GEARS ROTATE WITHIN SAID HOUSING MEANS, SAID HOUSING MEANS COMPRISING A PAIR OF CUP SHAPED MEMBERS FITTED OVER SAID GEARS FROM OPPOSITE SIDES AND MEETING IN EDGE TO EDGE RELATION ABOUT THE OUTER GEAR, A CUP-LIKE METAL CASING IN WHICH SAID HOUSING MEANS IS RECEIVED, AND A CLOSURE MEMBER IN THE OPEN SIDE OF SAID CASING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |