Patent US3247803A successfully refreshed from Google Patents.
US3247803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pump
Assignee: Old Carco LLC
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Filing: 1965-06-23
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Granted: 1966-04-26
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Expires: 1985-06-23
Abstract
No abstract record available.
Inventors
- 👤 David C Halsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:03
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3446; F04C2/3447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN A FLUID PUMP, A HOUSING, A ROTOR ROTATABLE WITHIN SAID HOUSING, A CAM ELEMENT EXTENDING AROUND SAID ROTOR AND COOPERATING THEREWITH TO PROVIDE TWO PUMPING CHAMBERS AND TWO INLET CHAMBERS MUTUALLY SPACING EACH OTHER CIRCUMFERENTIALLY, SAID CAM ELEMENT COMPRISING A PAIR OF PUMPING CAM ARCS ASSOCIATED WITH SAID PUMPING CHAMBERS RESPECTIVELY, A PAIR OF INLET CAM ARCS ASSOCIATED WITH SAID INLET CHAMBERS RESPECTIVELY, AND A SEPARATE CONSTANT RADIUS SEALING CAM ARC CONNECTING THE ENDS OF EACH INLET CAM ARC WITH THE PROXIMATE ENDS OF THE NEXT ADJACENT PUMPING CAM ARCS, SAID PAIR OF INLET CAM ARCS AND SAID PAIR OF PUMPING CAM ARCS MUTUALLY SPACING EACH OTHER CIRCUMFERENTIALLY, INLET AND OUTLET PORTS FOR SUPPLYING FLUID TO SAID INLET CHAMBERS AND FOR DISCHARGING FLUID FROM SAID PUMPING CHAMBERS RESPECTIVELY, A PLURALITY OF PUMPING ELEMENTS CARRIED BY SAID ROTOR AND COOPERABLE WITH SAID CAM ELEMENT TO PUMP SAID FLUID FROM SAID INLET CHAMBERS TO SAID PUMPING CHAMBERS, EACH INLET AND PUMPING CAM ARC BEING DEFINED BY A SEVENTH POWER POLYNOMIAL
Claim 2
Dependent Claim
169 words
IN A FLUID PUMP, A HOUSING, A ROTOR ROTATABLE WITHIN SAID HOUSING, A CAM ELEMENT EXTENDING AROUND SAID ROTOR AND COOPERATING THEREWITH TO PROVIDE TWO PUMPING CHAMBERS AND TWO INLET CHAMBERS MUTUALLY SPACING EACH OTHER CIRCUMFERENTIALLY, SAID CAM ELEMENT COMPRISING A PAIR OF PUMPING CAM ARCS ASSOCIATED WITH SAID PUMPING CHAMBERS RESPECTIVELY, A PAIR OF INLET CAM ARCS ASSOCIATED WITH SAID INLET CHAMBERS RESPECTIVELY, AND A SEPARATE CONSTANT RADIUS SEALING CAM ARC CONNECTING THE ENDS OF EACH INLET CAM ARC WITH THE PROXIMATE ENDS OF THE NEXT ADJACENT PUMPING CAM ARCS, SAID PAIR OF INLET CAM ARCS AND SAID PAIR OF PUMPING CAM ARCS MUTUALLY SPACING EACH OTHER CIRCUMFERENTIALLY, INLET AND OUTLET PORTS FOR SUPPLYING FLUID TO SAID INLET CHAMBERS AND FOR DISCHARGING FLUID FROM SAID PUMPING CHAMBERS RESPECTIVELY, A PLURALITY OF PUMPING ELEMENTS CARRIED BY SAID ROTOR AND COOPERABLE WITH SAID CAM ELEMENT TO PUMP SAID FLUID FROM SAID INLET CHAMBERS TO SAID PUMPING CHAMBERS, EACH INLET AND PUMPING CAM ARC BEING DEFINED BY A SEVENTH POWER POLYNOMIAL
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |