US3190233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumps
Assignee: Individual
•
Filing: 1963-03-05
•
Granted: 1965-06-22
•
Expires: 1983-03-05
Abstract
No abstract record available.
Inventors
- 👤 Welch Harold George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:59
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/102; F04B53/103; F04B3/00; F04B53/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PUMP HAVING A CYLINDER WITH CLOSED ENDS IN A COMMON CASING WITH A VALVE CHEST, A PAIR OF PISTONS RECIPROCABLE WITHIN SAID CYLINDER, A CRANK SHAFT IN SAID CYLINDER BETWEEN SAID PISTONS, CONNECTING RODS CONNECTING EACH OF SAID PISTONS TO SAID CRANK SHAFT AT A PHASE DIFFENCE OF APPROXIMATELY 60*, THE SPACE WITHIN SAID CYLINDER BETWEEN THE PISTONS BEING SEALED AND COMPRISING AN OPERATIVE PART OF THE PUMP IN ADDITION TO THE END SPACES BEYOND EACH OF THE PISTONS AND THE CLOSED ENDS OF SAID CYLINDER, ACCESS PORTS IN SAID COMMON CYLINDER ESTABLISHING COMMUNICATION BETWEEN SAID VALVE CHEST AND SAID COMMON CYLINDER, PRESSURE OPERATED VALVES CONTROLLING SAID ACCESS PORTS, AND WHEREIN SAID COMMON CASING IS COMPLETELY SEALED EXCEPT FOR SAID VALVED ACCESS PORTS.
Claim 2
Dependent Claim
124 words
A PUMP HAVING A CYLINDER WITH CLOSED ENDS IN A COMMON CASING WITH A VALVE CHEST, A PAIR OF PISTONS RECIPROCABLE WITHIN SAID CYLINDER, A CRANK SHAFT IN SAID CYLINDER BETWEEN SAID PISTONS, CONNECTING RODS CONNECTING EACH OF SAID PISTONS TO SAID CRANK SHAFT AT A PHASE DIFFENCE OF APPROXIMATELY 60*, THE SPACE WITHIN SAID CYLINDER BETWEEN THE PISTONS BEING SEALED AND COMPRISING AN OPERATIVE PART OF THE PUMP IN ADDITION TO THE END SPACES BEYOND EACH OF THE PISTONS AND THE CLOSED ENDS OF SAID CYLINDER, ACCESS PORTS IN SAID COMMON CYLINDER ESTABLISHING COMMUNICATION BETWEEN SAID VALVE CHEST AND SAID COMMON CYLINDER, PRESSURE OPERATED VALVES CONTROLLING SAID ACCESS PORTS, AND WHEREIN SAID COMMON CASING IS COMPLETELY SEALED EXCEPT FOR SAID VALVED ACCESS PORTS.
References Cited (Backward Citations)
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Cited
US1566620A
Cited
US793341A
Cited
US1060160A
Cited
US1183973A
Cited
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Cited
FR555900A
Cited
US2083073A
Cited
US2198722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |