Patent US3276385A successfully refreshed from Google Patents.
US3276385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-priming centrifugal pump
Assignee: Individual
•
Filing: 1965-01-05
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Granted: 1966-10-04
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Expires: 1985-01-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred S Marlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:05
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/004; F04D9/005; F04D9/02; Y; Y10; Y10S; Y10S415/00; Y10S415/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A CENTRIFUGAL PUMP COMPRISING A BACK PLATE, A HOLLOW CASING SECTION, MEANS FOR SECURING SAID CASING SECTION TO SAID BACK PLATE TO FORM A PUMP CASING, A WEAR PLATE ADJACENT TO SAID BACK PLATE, A FRONT PLATE SPACED FROM SAID WEAR PLATE, A PAIR OF CURVED SCROLL BLADES BETWEEN SAID WEAR PLATE AND FRONT PLATE, A PLURALITY OF ALIGNING PINS EXTENDING TRANSVERSELY THROUGH SAID BLADES AND SAID WEAR PLATE SUBSTANTIALLY PERPENDICULAR THERETO, RECESSES IN SAID BACK PLATE AND SAID FRONT PLATE FOR RECEIVING THE ENDS OF SAID PINS AND SECURING SAID BLADES BETWEEN SAID WEAR AND FRONT PLATES IN THE FORM OF A SPIRAL HAVING AN INLET ADJACENT THE BOTTOM THEREOF AND AN OUTLET ADJACENT THE TOP THEREOF, MEANS ON SAID FRONT PLATE AND SAID CASING SECTION FOR HOLDING SAID WEAR PLATE AND SAID FRONT PLATE IN ENGAGEMENT WITH THE EDGE OF SAID SCROLL
Claim 2
Dependent Claim
144 words
A CENTRIFUGAL PUMP COMPRISING A BACK PLATE, A HOLLOW CASING SECTION, MEANS FOR SECURING SAID CASING SECTION TO SAID BACK PLATE TO FORM A PUMP CASING, A WEAR PLATE ADJACENT TO SAID BACK PLATE, A FRONT PLATE SPACED FROM SAID WEAR PLATE, A PAIR OF CURVED SCROLL BLADES BETWEEN SAID WEAR PLATE AND FRONT PLATE, A PLURALITY OF ALIGNING PINS EXTENDING TRANSVERSELY THROUGH SAID BLADES AND SAID WEAR PLATE SUBSTANTIALLY PERPENDICULAR THERETO, RECESSES IN SAID BACK PLATE AND SAID FRONT PLATE FOR RECEIVING THE ENDS OF SAID PINS AND SECURING SAID BLADES BETWEEN SAID WEAR AND FRONT PLATES IN THE FORM OF A SPIRAL HAVING AN INLET ADJACENT THE BOTTOM THEREOF AND AN OUTLET ADJACENT THE TOP THEREOF, MEANS ON SAID FRONT PLATE AND SAID CASING SECTION FOR HOLDING SAID WEAR PLATE AND SAID FRONT PLATE IN ENGAGEMENT WITH THE EDGE OF SAID SCROLL
References Cited (Backward Citations)
CA660725A
Cited
FR459801A
Cited
US1879561A
Cited
US2653546A
Cited
US2951449A
Cited
GB848810A
Cited
US3045603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |