US3074351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumps
Assignee: Individual
•
Filing: 1959-09-01
•
Granted: 1963-01-22
•
Expires: 1979-09-01
Abstract
No abstract record available.
Inventors
- 👤 Foster Francis John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/126; B; B65; B65G; B65G53/00; B65G53/30; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F04B3/00; F04B43/00; F04B43/0009; F04B43/0081; F04B43/009; F04B43/08; F04B43/10; F04B49/00; F04B49/02; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/105; F04B9/109; F04B9/111; F04B9/113; F04B9/115; F04B9/117; F04B9/1172
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PUMP COMPRISING A PAIR OF FLEXIBLE, SUBSTANTIALLY TUBULAR, FIRST AND SECOND DIAPHRAGMS HAVING SMOOTH, NONRIBBED AND CONTINUOUS INNER SURFACES, SAID DIAPHRAGMS BEING LOCATED COAXIALLY AND HAVING FIXED OUTER ENDS; MEANS FORMING A BEARING APERTURE IN THE DIRECTION OF THE AXIS OF THE DIAPHRAGMS; A PLUNGER CONNECTED BETWEEN THE INNER ENDS OF THE DIAPHRAGMS AND CONSTRAINED TO MOVE RECIPROCABLY WITHIN SAID BEARING APERTURE, SAID PLUNGER HAVING A PASSAGE LEADING BETWEEN THE TWO DIAPHRAGMS; A NON-RETURN CONNECTING VALVE IN SAID PASSAGE FOR CONTROLLING FLOW NON-RETURNABLY FROM THE FIRST DIAPHRAGM TO THE SECOND DIAPHRAGM; NON-RETURN INLET VALVE MEANS ASSOCI-
Claim 2
Dependent Claim
97 words
A PUMP COMPRISING A PAIR OF FLEXIBLE, SUBSTANTIALLY TUBULAR, FIRST AND SECOND DIAPHRAGMS HAVING SMOOTH, NONRIBBED AND CONTINUOUS INNER SURFACES, SAID DIAPHRAGMS BEING LOCATED COAXIALLY AND HAVING FIXED OUTER ENDS; MEANS FORMING A BEARING APERTURE IN THE DIRECTION OF THE AXIS OF THE DIAPHRAGMS; A PLUNGER CONNECTED BETWEEN THE INNER ENDS OF THE DIAPHRAGMS AND CONSTRAINED TO MOVE RECIPROCABLY WITHIN SAID BEARING APERTURE, SAID PLUNGER HAVING A PASSAGE LEADING BETWEEN THE TWO DIAPHRAGMS; A NON-RETURN CONNECTING VALVE IN SAID PASSAGE FOR CONTROLLING FLOW NON-RETURNABLY FROM THE FIRST DIAPHRAGM TO THE SECOND DIAPHRAGM; NON-RETURN INLET VALVE MEANS ASSOCI-
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |