Patent US3095820A successfully refreshed from Google Patents.
US3095820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reentry rotary fluid pump
Assignee: Mcculloch Corp
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Filing: 1960-02-29
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Granted: 1963-07-02
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Sanborn
- 👤 Joe L Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/002; F04D23/00; F04D23/008; F04D29/00; F04D29/08; F04D29/16; F04D29/161
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A REENTRY ROTARY FLUID PUMP; A CASING; AN IMPELLER MOUNTED FOR ROTATIONG IN SAID CASING; A PLURALITY OF SPACED VANES DISPOSED ON SAID IMPELLER AT A COMMON RADIUS FROM THE CENTER OF THE ROTATIONAL AXIS OF SAID IMPELLER, SAID VANES EXTENDING OUTWARDLY FROM SAID IMPELLER; A FLOW PASSAGE IN SAID CASING LATERALLY OUTWARDLY OF SAID VANES AND IN COMMUNICATION THEREWITH; AN INLET INTO SAID CASING AND INTO SAID FLOW PASSAGE; A DISCHARGE PASSAGE FROM SAID FLOW PASSAGE OUTWARDLY THROUGH SAID CASING; A SEALING BLOCK IN SAID CASING OUTWARDLY OF SAID VANES PROVIDING A SEAL BETWEEN SAID INLET INTO SAID FLOW PASSAGE AND SAID DISCHARGE FROM SAID FLOW PASSAGE; AND A FLUID BLEED PORT ADJACENT THE SEALING BLOCK OPEN THROUGH THE CASING TO THE VANES ADJACENT THE OUTER PORTION OF SAID FLOW PASSAGE FOR PREVENTING RECIRCULATION OF TRAPPED FLUID IN THE FLOW PASSAGE.
Claim 2
Dependent Claim
143 words
IN A REENTRY ROTARY FLUID PUMP; A CASING; AN IMPELLER MOUNTED FOR ROTATIONG IN SAID CASING; A PLURALITY OF SPACED VANES DISPOSED ON SAID IMPELLER AT A COMMON RADIUS FROM THE CENTER OF THE ROTATIONAL AXIS OF SAID IMPELLER, SAID VANES EXTENDING OUTWARDLY FROM SAID IMPELLER; A FLOW PASSAGE IN SAID CASING LATERALLY OUTWARDLY OF SAID VANES AND IN COMMUNICATION THEREWITH; AN INLET INTO SAID CASING AND INTO SAID FLOW PASSAGE; A DISCHARGE PASSAGE FROM SAID FLOW PASSAGE OUTWARDLY THROUGH SAID CASING; A SEALING BLOCK IN SAID CASING OUTWARDLY OF SAID VANES PROVIDING A SEAL BETWEEN SAID INLET INTO SAID FLOW PASSAGE AND SAID DISCHARGE FROM SAID FLOW PASSAGE; AND A FLUID BLEED PORT ADJACENT THE SEALING BLOCK OPEN THROUGH THE CASING TO THE VANES ADJACENT THE OUTER PORTION OF SAID FLOW PASSAGE FOR PREVENTING RECIRCULATION OF TRAPPED FLUID IN THE FLOW PASSAGE.
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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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |