Patent US3661474A successfully refreshed from Google Patents.
US3661474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid booster device
Assignee: Roy E Roth Co
•
Filing: 1970-02-10
•
Granted: 1972-05-09
•
Expires: 1990-02-10
Abstract
Abstract A liquid booster device integrally formed with a turbine pump for delivering a liquid at or near boiling point upwardly from a liquid reservoir to the pump inlet. The tubular casing of the liquid booster device is integrally formed with the case head of the pump and houses at least one booster impeller mounted on a shaft extension of the main pump''s shaft. A circular flange is formed at the main pump''s inlet for mounting the combined turbine pump - liquid booster device at the top of the liquid reservoir such that the booster impeller is submerged in the liquid.
Inventors
- 👤 Leonard J Sieghartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:24
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/12; F04D5/00; F04D5/002; F04D5/003; F04D5/006; F04D7/00; F04D7/02; F04D7/06; F04D9/00; F04D9/04; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
143 words
A liquid booster device for delivering a liquid upwardly from a liquid reservoir to the inlet of a turbine pump, comprising a shaft extension coupled to the shaft of a turbine pump, an impeller having low pressure creating characteristics fixedly mounted on said shaft extension in a widely separated relation with said turbine pump inlet, a tubular casing disposed about said shaft extension and said impeller and having its upper open end secured to the inlet of the turbine pump to form an integral housing therewith, and means for mounting said integral housing in an upright orientation such that said tubular casing extends downwardly into the liquid reservoir, where said tubular casing includes at least one bearing support member for rotatably supporting said shaft extension disposed between said impeller and the coupling between said shaft extension and the shaft for the turbine pump.
Claim 2
Dependent Claim
143 words
A liquid booster device for delivering a liquid upwardly from a liquid reservoir to the inlet of a turbine pump, comprising a shaft extension coupled to the shaft of a turbine pump, an impeller having low pressure creating characteristics fixedly mounted on said shaft extension in a widely separated relation with said turbine pump inlet, a tubular casing disposed about said shaft extension and said impeller and having its upper open end secured to the inlet of the turbine pump to form an integral housing therewith, and means for mounting said integral housing in an upright orientation such that said tubular casing extends downwardly into the liquid reservoir, where said tubular casing includes at least one bearing support member for rotatably supporting said shaft extension disposed between said impeller and the coupling between said shaft extension and the shaft for the turbine pump.
Claim 3
Dependent Claim
36 words
A liquid booster device as defined in claim 1, wherein said tubular easing further includes a bowl section surrounding the periphery of said impeller and having a bushing for rotatably supporting the hub of said impeller.
References Cited (Backward Citations)
US2875698A
Cited
US682939A
Cited
US1004015A
Cited
FR630998A
Cited
US3247797A
Cited
US3250440A
Cited
US3385225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |