Patent US3257952A successfully refreshed from Google Patents.
US3257952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bellows pump
Assignee: Individual
•
Filing: 1964-06-29
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Granted: 1966-06-28
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Alan G Mccormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:00
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B43/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN BELLOWS PUMP INCLUDING, IN COMBINATION, HOUSING STRUCTURE DEFINING A BELLOWS CHAMBER HAVING A CHAMBER WALL PROVIDED WITH INLET AND OUTLET PORTS, A CYLINDER, AND A RESERVOIR DISPOSED BETWEEN AND INTERCONNECTING SAID BELLOWS CHAMBER AND SAID CYLINDER; A PUMP BELLOWS DISPOSED WITHIN SAID BELLOWS CHAMBER AND SPACED FROM SAID CHAMBER WALL THEREOF, SAID PUMP BELLOWS OPENING TOWARD SAID RESERVOIR; MEANS FOR SEALING SAID RESERVOIR FROM THAT PORTION OF SAID BELLOWS CHAMBER BETWEEN SAID BELLOWS CHAMBER WALL AND THE EXTERIOR OF SAID PUMP BELLOWS; A PISTON RECIPROCABLY AND OPERATIVELY MOVABLE WITHIN SAID CYLINDER; MEANS FOR RECIPROCATIVELY DRIVING SAID PISTON; AND OPERATING FLUID OPERATIVELY DISPOSED IN SAID HOUSING STRUCTURE WITHIN SAID BELLOWS AND BETWEEN SAID BELLOWS AND SAID PISTON; AND IMPROVEMENT COMPRISING MEANS FIXEDLY DISPOSED WITH RESPECT TO SAID HOUSING STRUCTURE AND COMMUNICATING WITH SAID RESERVOIR FOR RECEIVING A GIVEN QUANTITY OF SAID OPERATING FLUID WITHIN SAID RESERVOIR DUR-
Claim 2
Dependent Claim
147 words
IN BELLOWS PUMP INCLUDING, IN COMBINATION, HOUSING STRUCTURE DEFINING A BELLOWS CHAMBER HAVING A CHAMBER WALL PROVIDED WITH INLET AND OUTLET PORTS, A CYLINDER, AND A RESERVOIR DISPOSED BETWEEN AND INTERCONNECTING SAID BELLOWS CHAMBER AND SAID CYLINDER; A PUMP BELLOWS DISPOSED WITHIN SAID BELLOWS CHAMBER AND SPACED FROM SAID CHAMBER WALL THEREOF, SAID PUMP BELLOWS OPENING TOWARD SAID RESERVOIR; MEANS FOR SEALING SAID RESERVOIR FROM THAT PORTION OF SAID BELLOWS CHAMBER BETWEEN SAID BELLOWS CHAMBER WALL AND THE EXTERIOR OF SAID PUMP BELLOWS; A PISTON RECIPROCABLY AND OPERATIVELY MOVABLE WITHIN SAID CYLINDER; MEANS FOR RECIPROCATIVELY DRIVING SAID PISTON; AND OPERATING FLUID OPERATIVELY DISPOSED IN SAID HOUSING STRUCTURE WITHIN SAID BELLOWS AND BETWEEN SAID BELLOWS AND SAID PISTON; AND IMPROVEMENT COMPRISING MEANS FIXEDLY DISPOSED WITH RESPECT TO SAID HOUSING STRUCTURE AND COMMUNICATING WITH SAID RESERVOIR FOR RECEIVING A GIVEN QUANTITY OF SAID OPERATING FLUID WITHIN SAID RESERVOIR DUR-
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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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |