US3295458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Individual
•
Filing: 1964-08-13
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Granted: 1967-01-03
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Adam P G Steffes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:58
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/04; F04B39/041; F04B39/044; F04B43/00; F04B43/0009; F04B43/0054; F04B9/00; F04B9/08; F04B9/12; F04B9/123; F04B9/127
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A PUMP HAVING A CASING, A FLEXIBLE DIAPHRAGM MOUNTED WITHIN SAID CASING, A PISTON WITHIN SAID CASING ENGAGING SAID DIAPHRAGM, A RING SURROUNDING SAID PISTON AND FILLING THE SPACE BETWEEN SAID PISTON AND SAID CASING AND ENGAGING SAID DIAPHRAGM, THE COMBINATION OF: MEANS FORMING A RACK ON SAID PISTON, A SPIDER ABUTTING SAID RING AND POSITIONED BETWEEN SAID CASING AND PISTON, MEANS FORMING A SECOND RACK ON SAID SPIDER, PINIONS MESHING WITH SAID RACKS AND MOUNTED FOR ROTATION UPON SAID CASING, SAID CASING HAVING AN INLET AND AN OUTLET ON THE OPPOSITE SIDE OF SAID DIAPHRAGM FROM SAID PISTON, AND A SHAFT JOURNALLED IN SAID CASING AND PROJECTING THROUGH SAID PISTON AND SPIDER SUPPORTING SAID PINIONS.
Claim 2
Dependent Claim
117 words
IN A PUMP HAVING A CASING, A FLEXIBLE DIAPHRAGM MOUNTED WITHIN SAID CASING, A PISTON WITHIN SAID CASING ENGAGING SAID DIAPHRAGM, A RING SURROUNDING SAID PISTON AND FILLING THE SPACE BETWEEN SAID PISTON AND SAID CASING AND ENGAGING SAID DIAPHRAGM, THE COMBINATION OF: MEANS FORMING A RACK ON SAID PISTON, A SPIDER ABUTTING SAID RING AND POSITIONED BETWEEN SAID CASING AND PISTON, MEANS FORMING A SECOND RACK ON SAID SPIDER, PINIONS MESHING WITH SAID RACKS AND MOUNTED FOR ROTATION UPON SAID CASING, SAID CASING HAVING AN INLET AND AN OUTLET ON THE OPPOSITE SIDE OF SAID DIAPHRAGM FROM SAID PISTON, AND A SHAFT JOURNALLED IN SAID CASING AND PROJECTING THROUGH SAID PISTON AND SPIDER SUPPORTING SAID PINIONS.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |