US3102490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbo pumping apparatus
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1961-07-18
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Granted: 1963-09-03
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Expires: 1981-07-18
Abstract
No abstract record available.
Inventors
- 👤 Donald P Shiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/06; F04D29/061; F04D9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PUMP COMPRISING AN IMPELLER CASING HAVING CONICAL SIDE WALLS DISPOSED AT AN ANGLE WITH RESPECT TO THE IMPELLER AXIS OF ROTATION AND CONVERGING TOWARD A CENTER INLET AT ONE END OF SAID IMPELLER CASING, A PUMP SHAFT IN SAID CASING HAVING A HUB CARRYING ROTATABLE SCREW VANES IN SAID IMPELLER CASING, THE ANGLE BETWEEN SAID SCREW VANES AND THE CENTER LINE OF THE PUMP SHAFT BEING SUCH THAT AT FLOWS ON OR ABOUT RATED FLOW THE SEPARATION FORCES TENDING TO SEPARATE FLUID AND VAPOR APPROACH ZERO, WHEREBY BUBBLES OF VAPOR WILL TEND TO MAINTAIN A CONSTANT SPACING FROM THE IMPELLER CASING, A VOLUTE CASING AT THE DISCHARGE END OF SAID IMPELLER CASING,
Claim 2
Dependent Claim
113 words
A PUMP COMPRISING AN IMPELLER CASING HAVING CONICAL SIDE WALLS DISPOSED AT AN ANGLE WITH RESPECT TO THE IMPELLER AXIS OF ROTATION AND CONVERGING TOWARD A CENTER INLET AT ONE END OF SAID IMPELLER CASING, A PUMP SHAFT IN SAID CASING HAVING A HUB CARRYING ROTATABLE SCREW VANES IN SAID IMPELLER CASING, THE ANGLE BETWEEN SAID SCREW VANES AND THE CENTER LINE OF THE PUMP SHAFT BEING SUCH THAT AT FLOWS ON OR ABOUT RATED FLOW THE SEPARATION FORCES TENDING TO SEPARATE FLUID AND VAPOR APPROACH ZERO, WHEREBY BUBBLES OF VAPOR WILL TEND TO MAINTAIN A CONSTANT SPACING FROM THE IMPELLER CASING, A VOLUTE CASING AT THE DISCHARGE END OF SAID IMPELLER CASING,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |