US3200754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water pump
Assignee: Individual
•
Filing: 1964-02-10
•
Granted: 1965-08-17
•
Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Kermit H Burgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A PUMP STRUCTURE HAVING TWO STAGES, COMPRISING A VERTICALLY EXTENDING DRIVE SHAFT; A FIRST HOLLOW FRUSTO-CONICAL MEMBER DRIVINGLY FIXED TO SAID SHAFT; A SECOND FRUSTO-CONICAL MEMBER OF APPROXIMATELY EQUAL HEIGHT TO AND BEING WITHIN SAID FIRST MEMBER, DRIVINGLY FIXED TO SAID SHAFT AND RADIALLY SPACED FROM THE FIRST MEMBER DEFINING AN ANNULAR SPACE THEREBETWEEN; AT LEAST ONE CONTINUOUS SPIRAL MEMBER EXTENDING FROM THE LOWER TO TOP ENDS OF SAID TWO MEMBERS AND ENGAGING BY ITS SIDE EDGES TO BOTH OF SAID MEMBERS FORMING A CONFINED SPIRAL CHAMBER THEREBETWEEN OPEN AT BOTTOM AND TOP OF THOSE MEMBERS; AN IMPELLER UNIT ABOVE SAID MEMBERS AND DRIVING FIXED TO SAID SHAFT; SAID IMPELLER UNIT HAVING A CENTRAL ZONE OPEN FROM ITS UNDERSIDE AND COMPRISED A NUMBER OF VANES OF COMMON LENGTH RADIATING HORIZONTALLY FROM THE ZONE A HOUSING SURROUNDING THE OUTER ENDS OF SAID VANES WITH AT LEAST ONE SIDE OPENING; A DISCHARGE CONDUIT; AND A SCROLL SPIRALLING FROM OVER SAID OPENING AND DISCHARGING INTO SAID CONDUIT.
Claim 2
Dependent Claim
164 words
A PUMP STRUCTURE HAVING TWO STAGES, COMPRISING A VERTICALLY EXTENDING DRIVE SHAFT; A FIRST HOLLOW FRUSTO-CONICAL MEMBER DRIVINGLY FIXED TO SAID SHAFT; A SECOND FRUSTO-CONICAL MEMBER OF APPROXIMATELY EQUAL HEIGHT TO AND BEING WITHIN SAID FIRST MEMBER, DRIVINGLY FIXED TO SAID SHAFT AND RADIALLY SPACED FROM THE FIRST MEMBER DEFINING AN ANNULAR SPACE THEREBETWEEN; AT LEAST ONE CONTINUOUS SPIRAL MEMBER EXTENDING FROM THE LOWER TO TOP ENDS OF SAID TWO MEMBERS AND ENGAGING BY ITS SIDE EDGES TO BOTH OF SAID MEMBERS FORMING A CONFINED SPIRAL CHAMBER THEREBETWEEN OPEN AT BOTTOM AND TOP OF THOSE MEMBERS; AN IMPELLER UNIT ABOVE SAID MEMBERS AND DRIVING FIXED TO SAID SHAFT; SAID IMPELLER UNIT HAVING A CENTRAL ZONE OPEN FROM ITS UNDERSIDE AND COMPRISED A NUMBER OF VANES OF COMMON LENGTH RADIATING HORIZONTALLY FROM THE ZONE A HOUSING SURROUNDING THE OUTER ENDS OF SAID VANES WITH AT LEAST ONE SIDE OPENING; A DISCHARGE CONDUIT; AND A SCROLL SPIRALLING FROM OVER SAID OPENING AND DISCHARGING INTO SAID CONDUIT.
References Cited (Backward Citations)
GB191104793A
Cited
US1717694A
Cited
US2159278A
Cited
US2659311A
Cited
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Cited
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Cited
US2984189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |