Patent US1946572A successfully refreshed from Google Patents.
US3276384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check and priming valve means for self-priming pumping system
Assignee: Studebaker Worthington Inc
•
Filing: 1964-08-31
•
Granted: 1966-10-04
•
Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Franklin E Boone
- 👤 Berman Merril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:25
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/004; F04D9/005; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/10; F04D9/007; F04D9/008; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
234 words
IN A SELF-PRIMING LIQUID PUMPING SYSTEM: (A) A SUCTION WELL CONNECTED TO A SOURCE OF FLUID TO BE PUMPED (B) MULTI-STAGE PUMP MEANS FOR PUMPING FLUID FROM SAID SUCTION WELL OPERATIVELY SUPPORTED IN SAID SUCTION WELL AND DISPOSED TO FORM THEREWITH AN ANNULAR CHAMBER ABOUT THE PUMP ADAPTED TO RECEIVE THE FLUID TO BE PUMPED (C) A HOUSING FORMING A CHAMBER (D) AT LEAST ONE STAGE AT THE LOWER END OF THE PUMP MEANS HAVING ITS SUCTION DISPOSED TO COMMUNICATE WITH FLUID TO BE PUMPED FROM THE ANNULAR CHAMBER AND AT LEAST ONE STAGE OF SAID PUMP MEANS CONNECTED TO THE HOUSING TO DISCHARGE PUMPED FLUID TO THE CHAMBER IN SAID HOUSING (E) THE CHAMBER IN SAID HOUSING HAVING A DISCHARGE PORT FOR FLUID DELIVERED THERETO IN THE UPPER PORTION AND A RETURN PORT IN THE LOWER PORTION THEREOF (F) A NORMAL CLOSED VALVE FOR THE DISCHARGE PORT TO BE ACTUATED TO AN OPEN POSITION BY THE DISCHARGE PRESSURE OF THE FLUID BEING PUMPED (G) A NORMALLY OPEN VALVE FOR THE RETURN PORT, (H) MEANS OPERATIVELY CONNECTING THE DISCHARGE PORT VALVE AND THE RETURN PORT VALVE WHEREBY WHEN THE DISCHARGE PORT VALVE IS ACTUATED TO AN OPEN POSITION BY THE DISCHARGE PRESSURE OF THE FLUID BEING PUMPED THE RETURN PORT VALVE WILL BE AUTOMATICALLY CLOSED (I) A RETURN CONDUIT CONNECTED BETWEEN THE HOUSING AND THE SUCTION WELL TO PERMIT FLUID TO FLOW FROM SAID
Claim 2
Dependent Claim
234 words
IN A SELF-PRIMING LIQUID PUMPING SYSTEM: (A) A SUCTION WELL CONNECTED TO A SOURCE OF FLUID TO BE PUMPED (B) MULTI-STAGE PUMP MEANS FOR PUMPING FLUID FROM SAID SUCTION WELL OPERATIVELY SUPPORTED IN SAID SUCTION WELL AND DISPOSED TO FORM THEREWITH AN ANNULAR CHAMBER ABOUT THE PUMP ADAPTED TO RECEIVE THE FLUID TO BE PUMPED (C) A HOUSING FORMING A CHAMBER (D) AT LEAST ONE STAGE AT THE LOWER END OF THE PUMP MEANS HAVING ITS SUCTION DISPOSED TO COMMUNICATE WITH FLUID TO BE PUMPED FROM THE ANNULAR CHAMBER AND AT LEAST ONE STAGE OF SAID PUMP MEANS CONNECTED TO THE HOUSING TO DISCHARGE PUMPED FLUID TO THE CHAMBER IN SAID HOUSING (E) THE CHAMBER IN SAID HOUSING HAVING A DISCHARGE PORT FOR FLUID DELIVERED THERETO IN THE UPPER PORTION AND A RETURN PORT IN THE LOWER PORTION THEREOF (F) A NORMAL CLOSED VALVE FOR THE DISCHARGE PORT TO BE ACTUATED TO AN OPEN POSITION BY THE DISCHARGE PRESSURE OF THE FLUID BEING PUMPED (G) A NORMALLY OPEN VALVE FOR THE RETURN PORT, (H) MEANS OPERATIVELY CONNECTING THE DISCHARGE PORT VALVE AND THE RETURN PORT VALVE WHEREBY WHEN THE DISCHARGE PORT VALVE IS ACTUATED TO AN OPEN POSITION BY THE DISCHARGE PRESSURE OF THE FLUID BEING PUMPED THE RETURN PORT VALVE WILL BE AUTOMATICALLY CLOSED (I) A RETURN CONDUIT CONNECTED BETWEEN THE HOUSING AND THE SUCTION WELL TO PERMIT FLUID TO FLOW FROM SAID
References Cited (Backward Citations)
FR995383A
Cited
US2902940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |