Patent US3291350A successfully refreshed from Google Patents.
US3291350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump
Assignee: Individual
•
Filing: 1963-11-05
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Granted: 1966-12-13
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Expires: 1983-11-05
Abstract
No abstract record available.
Inventors
- 👤 Jerry P Malec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:33
CPC Classifications
F; F16; F16N; F16N3/00; F16N3/10; F16N3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN A FLUID PUMP MEANS, A HOUSING HAVING A FIRST BORE AND SECOND BORE HAVING ITS REAR END COMMUNICATING WITH THE FORWARD END OF SAID FIRST BORE; SAID SECOND BORE HAVING A DIAMETER LESS THAN THAT OF THE DIAMETER OF SAID FIRST BORE, A MATTER EXIT PORT IN SAID HOUSING COMMUNICATING WITH THE FORWARD END AREA OF SAID SECOND BORE, A MATTER INLET PORT IN SAID HOUSING COMMUNICATING WITH THE INSIDE OF SAID FIRST BORE, A FIRST PISTON SLIDABLE IN SAID FIRST BORE, A SECOND PISTON CONNECTED TO SAID FIRST PISTON AND CAPABLE OF ENTERING AND SLIDING IN SAID SECOND BORE, MEANS FOR RECIPROCATING SAID PISTONS, AND A MEANS FOR THE RELIEF OF TRAPPED MATTER IN SAID FIRST BORE AFTER SAID SECOND PISTON HAS ENTERED SAID SECOND BORE; SAID MEANS FOR THE RELIEF OF TRAPPED MATTER COMPRISING IN PART A RELIEF PASSAGEWAY IN SAID FIRST PISTON IN COMMUNICATION WITH SAID MATTER INLET PORT.
Claim 2
Dependent Claim
153 words
IN A FLUID PUMP MEANS, A HOUSING HAVING A FIRST BORE AND SECOND BORE HAVING ITS REAR END COMMUNICATING WITH THE FORWARD END OF SAID FIRST BORE; SAID SECOND BORE HAVING A DIAMETER LESS THAN THAT OF THE DIAMETER OF SAID FIRST BORE, A MATTER EXIT PORT IN SAID HOUSING COMMUNICATING WITH THE FORWARD END AREA OF SAID SECOND BORE, A MATTER INLET PORT IN SAID HOUSING COMMUNICATING WITH THE INSIDE OF SAID FIRST BORE, A FIRST PISTON SLIDABLE IN SAID FIRST BORE, A SECOND PISTON CONNECTED TO SAID FIRST PISTON AND CAPABLE OF ENTERING AND SLIDING IN SAID SECOND BORE, MEANS FOR RECIPROCATING SAID PISTONS, AND A MEANS FOR THE RELIEF OF TRAPPED MATTER IN SAID FIRST BORE AFTER SAID SECOND PISTON HAS ENTERED SAID SECOND BORE; SAID MEANS FOR THE RELIEF OF TRAPPED MATTER COMPRISING IN PART A RELIEF PASSAGEWAY IN SAID FIRST PISTON IN COMMUNICATION WITH SAID MATTER INLET PORT.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |