Patent US3079866A successfully refreshed from Google Patents.
US3079866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified centrifugal pump
Assignee: Texaco Inc
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Filing: 1959-07-16
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Granted: 1963-03-05
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Expires: 1979-07-16
Abstract
No abstract record available.
Inventors
- 👤 George D Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:12
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2216; F04D29/08; F04D29/16; F04D29/165; F04D29/167; F04D7/00; F04D7/02; F04D7/04; F04D7/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN COMBINATION IN A CENTRIFUGAL PUMP, A BEARING SECTION AND AN INLET CASING SECTION TOGETHER DEFINING A PUMP CHAMBER, AN IMPELLER HOUSED IN SAID CHAMBER AND COMPRISING A HUB, SPIRAL VANES OF DIMINISHING RADIAL CROSS SECTION SUPPORTED ON THAT PORTION OF SAID HUB FACING SAID INLET CASING SECTION, AND A SHROUD FASTENED TO THE EDGES OF SAID VANES FACING SAID INLET CASING SECTION STARTING AT THE DISCHARGE EDGES THEREOF AND EXTENDING INWARDLY RADIALLY PARTLY ALONG SAID VANES FACING SAID INLET CASING SECTION THEREBY DEFINING A SINGLE SHROUD IMPELLER WHEREBY SAID VANES ON THE SIDE FACING SAID BEARING SECTION HAVE FREE EDGE PORTIONS, AND A REPLACEABLE WEAR PLATE SUPPORTED BY SAID BEARING SECTION IN SLIDING CONTACT WITH SAID FREE EDGE PORTIONS OF SAID VANES ON THE SIDE OF SAID IMPELLER FACING SAID BEARING SECTION, SAID WEAR PLATE HAVING A CYLINDRICAL ANNULAR FORM, SAID IMPELLER INCLUDING AN ANNULAR WEAR RING SUPPORTED BY THE HUB THEREOF ADJACENT SAID FREE EDGE PORTIONS OF SAID VANES AND OF SUCH DIMENSION AS TO CONTACT THE ANNULAR WEAR PLATE ON THE INNER CYLINDRICAL SURFACE THEREOF.
Claim 2
Dependent Claim
178 words
IN COMBINATION IN A CENTRIFUGAL PUMP, A BEARING SECTION AND AN INLET CASING SECTION TOGETHER DEFINING A PUMP CHAMBER, AN IMPELLER HOUSED IN SAID CHAMBER AND COMPRISING A HUB, SPIRAL VANES OF DIMINISHING RADIAL CROSS SECTION SUPPORTED ON THAT PORTION OF SAID HUB FACING SAID INLET CASING SECTION, AND A SHROUD FASTENED TO THE EDGES OF SAID VANES FACING SAID INLET CASING SECTION STARTING AT THE DISCHARGE EDGES THEREOF AND EXTENDING INWARDLY RADIALLY PARTLY ALONG SAID VANES FACING SAID INLET CASING SECTION THEREBY DEFINING A SINGLE SHROUD IMPELLER WHEREBY SAID VANES ON THE SIDE FACING SAID BEARING SECTION HAVE FREE EDGE PORTIONS, AND A REPLACEABLE WEAR PLATE SUPPORTED BY SAID BEARING SECTION IN SLIDING CONTACT WITH SAID FREE EDGE PORTIONS OF SAID VANES ON THE SIDE OF SAID IMPELLER FACING SAID BEARING SECTION, SAID WEAR PLATE HAVING A CYLINDRICAL ANNULAR FORM, SAID IMPELLER INCLUDING AN ANNULAR WEAR RING SUPPORTED BY THE HUB THEREOF ADJACENT SAID FREE EDGE PORTIONS OF SAID VANES AND OF SUCH DIMENSION AS TO CONTACT THE ANNULAR WEAR PLATE ON THE INNER CYLINDRICAL SURFACE THEREOF.
References Cited (Backward Citations)
US538050A
Cited
GB189901616A
Cited
US721207A
Cited
US772532A
Cited
US790795A
Cited
GB190715895A
Cited
US914283A
Cited
US1099921A
Cited
GB191227740A
Cited
GB267300A
Cited
US1743916A
Cited
US2852009A
Cited
GB730459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |