US3228570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispensing pump valve structure
Assignee: Valve Corp of America Inc
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Filing: 1964-05-27
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Granted: 1966-01-11
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Expires: 1984-05-27
Abstract
No abstract record available.
Inventors
- 👤 Wolf Steiman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:33
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/0005; B05B11/0062; B05B11/007; B05B11/01; B05B11/10; B05B11/1001; B05B11/1023; B05B11/1026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A DISPENSING PUMP, A VALVE CONSTRUCTION COMPRISING, IN COMBINATION: (A) A CYLINDER, (B) A PISTON ROD AND PISTON MOVABLE IN THE CYLINDER TO AND FROM A DEPRESSED POSITION AND HAVING A CENTRAL DISCHARGE PASSAGE, (C) A COMPRESSION RETURN SPRING BIASING THE PISTON AWAY FROM ITS DEPRESSED POSITION, AND (D) VALVE MEANS INCLUDING A MOVABLE PART THE MOVEMENT OF WHICH OPENS AND CLOSES THE VALVE MEANS AND IS ENGAGED BY SAID COMPRESSION SPRING FOR CONTROLLING SAID DISCHARGE PASSAGE, SAID PART BEING OPERATED IN SMALL MEASURE BY INCREASED COMPRESSION OF THE SPRING
Claim 2
Dependent Claim
91 words
IN A DISPENSING PUMP, A VALVE CONSTRUCTION COMPRISING, IN COMBINATION: (A) A CYLINDER, (B) A PISTON ROD AND PISTON MOVABLE IN THE CYLINDER TO AND FROM A DEPRESSED POSITION AND HAVING A CENTRAL DISCHARGE PASSAGE, (C) A COMPRESSION RETURN SPRING BIASING THE PISTON AWAY FROM ITS DEPRESSED POSITION, AND (D) VALVE MEANS INCLUDING A MOVABLE PART THE MOVEMENT OF WHICH OPENS AND CLOSES THE VALVE MEANS AND IS ENGAGED BY SAID COMPRESSION SPRING FOR CONTROLLING SAID DISCHARGE PASSAGE, SAID PART BEING OPERATED IN SMALL MEASURE BY INCREASED COMPRESSION OF THE SPRING
References Cited (Backward Citations)
US2489976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |