US3224376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump for contaminated liquids
Assignee: Individual
•
Filing: 1963-09-17
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Granted: 1965-12-21
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Expires: 1983-09-17
Abstract
No abstract record available.
Inventors
- 👤 Schade Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/04; F04D7/045; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2288
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A CENTRIFUGAL PUMP FOR CONVEYING LIQUIDS CONTAMINATED WITH SOLIDS HAVING A HOUSING, AN IMPELLER ROTATABLY MOUNTED IN SAID HOUSING, MEANS FOR DRIVING SAID IMPELLER, SAID HOUSING HAVING AT LEAST ONE INLET OPENING LEADING TO SAID IMPELLER, DISINTEGRATING MEANS COMPRISING A CUTTER RING REMOVABLY SECURED AND TO AND ROTATABLE WITH SAID IMPELLER AND DISPOSED IN FRONT OF SAID INLET OPENING, SAID CUTTER RING HAVING APERTURES FOR THE PASSAGE OF LIQUIDS THERETHROUGH TO SAID INLET OPENING, THE OUTER EDGES OF SAID APERTURES FORMING CUTTING EDGES, AT LEAST ONE CUTTER BLADE OPERATIVELY ASSOCIATED WITH SAID CUTTER RING, SPRING MEANS ACTING UPON SAID CUTTER BLADE TO PRESS THE SAME TOWARD SAID CUTTER RING, MEANS MOUNTING SAID CUTTE RBLADE SO AS TO BE MOVABLE RELATIVE TO SAID CUTTER RING AND TO PERMIT SAID CUTTER BLADE TO YIELD AGAINST THE ACTION OF SAID SPRING
Claim 2
Dependent Claim
138 words
A CENTRIFUGAL PUMP FOR CONVEYING LIQUIDS CONTAMINATED WITH SOLIDS HAVING A HOUSING, AN IMPELLER ROTATABLY MOUNTED IN SAID HOUSING, MEANS FOR DRIVING SAID IMPELLER, SAID HOUSING HAVING AT LEAST ONE INLET OPENING LEADING TO SAID IMPELLER, DISINTEGRATING MEANS COMPRISING A CUTTER RING REMOVABLY SECURED AND TO AND ROTATABLE WITH SAID IMPELLER AND DISPOSED IN FRONT OF SAID INLET OPENING, SAID CUTTER RING HAVING APERTURES FOR THE PASSAGE OF LIQUIDS THERETHROUGH TO SAID INLET OPENING, THE OUTER EDGES OF SAID APERTURES FORMING CUTTING EDGES, AT LEAST ONE CUTTER BLADE OPERATIVELY ASSOCIATED WITH SAID CUTTER RING, SPRING MEANS ACTING UPON SAID CUTTER BLADE TO PRESS THE SAME TOWARD SAID CUTTER RING, MEANS MOUNTING SAID CUTTE RBLADE SO AS TO BE MOVABLE RELATIVE TO SAID CUTTER RING AND TO PERMIT SAID CUTTER BLADE TO YIELD AGAINST THE ACTION OF SAID SPRING
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |