US3246606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive pump
Assignee: Individual
•
Filing: 1963-01-21
•
Granted: 1966-04-19
•
Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Axel L Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:05
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A SELF-PRIMING LIQUID PUMP UNIT, COMPRISING A PUMP HOUSING, AN IMPELLER MOUNTED TO ROTATE THEREIN, SAID HOUSING HAVING A DISCHARGE OPENING, AN INTAKE EYE OPENING TO THE INTERIOR OF THE HOUSING COAXIALLY OF THE ROTATIVE AXIS OF THE IMPELLER, A PORT OPENING TO THE HOUSING INTERIOR, SAID PORT BEING LOCATED IN A CIRCUMFERENTIAL ZONE OF SUBSTANTIALLY NEUTRAL PRESSURE RADIALLY OUTWARDLY OF THE IMPELLER AXIS AT WHICH THE PRESSURE CONDITION WITHIN THE HOUSING DURING PUMPING CHANGES FROM NEGATIVE TO POSITIVE, AND PASSAGE MEANS COMMUNICATING WITH SAID PORT THROUGH WHICH AIR IS UNIDIRECTIONALLY DISCHARGED FROM THE INTERIOR OF SAID HOUSING IN PRIMING AT THE COMMENCEMENT OF PUMPING.
Claim 2
Dependent Claim
105 words
A SELF-PRIMING LIQUID PUMP UNIT, COMPRISING A PUMP HOUSING, AN IMPELLER MOUNTED TO ROTATE THEREIN, SAID HOUSING HAVING A DISCHARGE OPENING, AN INTAKE EYE OPENING TO THE INTERIOR OF THE HOUSING COAXIALLY OF THE ROTATIVE AXIS OF THE IMPELLER, A PORT OPENING TO THE HOUSING INTERIOR, SAID PORT BEING LOCATED IN A CIRCUMFERENTIAL ZONE OF SUBSTANTIALLY NEUTRAL PRESSURE RADIALLY OUTWARDLY OF THE IMPELLER AXIS AT WHICH THE PRESSURE CONDITION WITHIN THE HOUSING DURING PUMPING CHANGES FROM NEGATIVE TO POSITIVE, AND PASSAGE MEANS COMMUNICATING WITH SAID PORT THROUGH WHICH AIR IS UNIDIRECTIONALLY DISCHARGED FROM THE INTERIOR OF SAID HOUSING IN PRIMING AT THE COMMENCEMENT OF PUMPING.
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |