US3093083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch and pump control unit for sump, riser and the like
Assignee: Individual
•
Filing: 1959-11-09
•
Granted: 1963-06-11
•
Expires: 1979-11-09
Abstract
No abstract record available.
Inventors
- 👤 Axel L Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:15
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN COMBINATION WITH AN UPRIGHT LIQUID ACCUMULATING CASING HAVING A LATERAL LIQUID INTAKE CONDUIT COMMUNICATING WITH THE UPRIGHT CASING AT A PREDETERMINED POINT AND HAVING A LEVEL OF LIQUID THEREIN, A SWITCH CONTROLLED PUMP UNIT, COMPRISING A PUMP INCLUDING A ROTARY IMPELLER AND A HOUSING IN WHICH SAID IMPELLER IS MOUNTED FOR ROTATION, SAID HOUSING BEING PROVIDED WITH MEANS TO DISCHARGE LIQUID AND HAVING LIQUID INTAKE MEANS EXTENDING INTO SAID CASING AND COMMUNICATING UPWARDLY WITH SAID HOUSING, SAID INTAKE MEANS HAVING AN INTAKE OPENING A SUBSTANTIAL DISTANCE BENEATH THE HOUSING, A MOTOR OPERATIVELY CONNECTED TO SAID IMPELLER TO DRIVE THE LATTER, A SWITCH DEVICE HAVING A PRESSURE RESPONSIVE MEMBER, CONTROLLING THE SAME, AND MEANS PROVIDING AN APERTURE FOR THE UPWARD APPLICATION OF LIQUID PRESSURE ON SAID PRESSURE RESPONSIVE MEMBER, SAID LAST NAMED MEANS AND
Claim 2
Dependent Claim
134 words
IN COMBINATION WITH AN UPRIGHT LIQUID ACCUMULATING CASING HAVING A LATERAL LIQUID INTAKE CONDUIT COMMUNICATING WITH THE UPRIGHT CASING AT A PREDETERMINED POINT AND HAVING A LEVEL OF LIQUID THEREIN, A SWITCH CONTROLLED PUMP UNIT, COMPRISING A PUMP INCLUDING A ROTARY IMPELLER AND A HOUSING IN WHICH SAID IMPELLER IS MOUNTED FOR ROTATION, SAID HOUSING BEING PROVIDED WITH MEANS TO DISCHARGE LIQUID AND HAVING LIQUID INTAKE MEANS EXTENDING INTO SAID CASING AND COMMUNICATING UPWARDLY WITH SAID HOUSING, SAID INTAKE MEANS HAVING AN INTAKE OPENING A SUBSTANTIAL DISTANCE BENEATH THE HOUSING, A MOTOR OPERATIVELY CONNECTED TO SAID IMPELLER TO DRIVE THE LATTER, A SWITCH DEVICE HAVING A PRESSURE RESPONSIVE MEMBER, CONTROLLING THE SAME, AND MEANS PROVIDING AN APERTURE FOR THE UPWARD APPLICATION OF LIQUID PRESSURE ON SAID PRESSURE RESPONSIVE MEMBER, SAID LAST NAMED MEANS AND
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |