Patent US3304007A successfully refreshed from Google Patents.
US3304007A
Expired / Lapsed
US
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Flow regulating turbulence arrestor for centrifugal pumps
Assignee: Rain Jet Corp
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Filing: 1965-03-11
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Granted: 1967-02-14
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Expires: 1985-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John O Hruby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:46
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/466
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A CENTRIFUGAL PUMP HAVING AN IMPELLER CHAMBER, AN INLET TO THE CHAMBER, AND AN OUTLET OF SELECTED CROSSSECTIONAL AREA FROM THE CHAMBER, APPARATUS FOR REGULATING THE PUMP DISCHARGE FLOWRATE AND FOR ARRESTING TURBULENCE IN THE PUMP DISCHARGE COMPRISING A SUBSTANTIALLY SMOOTHWALLED DUCT HAVING A CROSS-SECTIONAL AREA AT ANY POINT THEREALONG SUBSTANTIALLY EQUAL AT LEAST TO THE AREA OF THE IMPELLER CHAMBER OUTLET, THE DUCT EXTENDING FROM THE IMPELLER CHAMBER OUTLET A SELECTED DISTANCE AROUND THE IMPELLER CHAMBER TO A PUMP DISCHARGE OUTLET, AND AN INFINITELY ADJUSTABLE VALVE LOCALLY IN THE DUCT SUBSTANTIALLY CLOSER TO THE IMPELLER CHAMBER OUTLET THAN TO THE PUMP DISCHARGE OUTLET.
Claim 2
Dependent Claim
105 words
IN A CENTRIFUGAL PUMP HAVING AN IMPELLER CHAMBER, AN INLET TO THE CHAMBER, AND AN OUTLET OF SELECTED CROSSSECTIONAL AREA FROM THE CHAMBER, APPARATUS FOR REGULATING THE PUMP DISCHARGE FLOWRATE AND FOR ARRESTING TURBULENCE IN THE PUMP DISCHARGE COMPRISING A SUBSTANTIALLY SMOOTHWALLED DUCT HAVING A CROSS-SECTIONAL AREA AT ANY POINT THEREALONG SUBSTANTIALLY EQUAL AT LEAST TO THE AREA OF THE IMPELLER CHAMBER OUTLET, THE DUCT EXTENDING FROM THE IMPELLER CHAMBER OUTLET A SELECTED DISTANCE AROUND THE IMPELLER CHAMBER TO A PUMP DISCHARGE OUTLET, AND AN INFINITELY ADJUSTABLE VALVE LOCALLY IN THE DUCT SUBSTANTIALLY CLOSER TO THE IMPELLER CHAMBER OUTLET THAN TO THE PUMP DISCHARGE OUTLET.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |