US3107625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal liquid pump
Assignee: Individual
•
Filing: 1961-09-01
•
Granted: 1963-10-22
•
Expires: 1981-09-01
Abstract
No abstract record available.
Inventors
- 👤 Walter E Amberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:15
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2238; F04D29/2255; F04D29/2205; F04D29/2222; F04D29/2233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN A CENTRIFUGAL LIQUID PUMP HAVING A PUMPING CHAMBER, AN INLET AND AN OUTLET, A ROTATING CENTRIFUGAL IMPELLER ROTATABLY MOUNTED IN THE PUMPING CHAMBER AND INCLUDING A CIRCULAR SIDE WALL, AND A SUBSTANTIALLY RADIALLY CORRUGATED ANNULAR STRIP OF SUBSTANTIALLY UNIFORM THICKNESS SECURED TO THE CIRCULAR SIDE WALL AND FORMING A CENTRAL CYLINDIRCAL CAVITY COMMUNICATING WITH THE INLET, AN OUTER CYLINDRICAL PERIPHERAL SURFACE COMMUNICATING WITH THE OUTLET AND OF LESSER AXIAL DEPTH THAN THE AXIAL DEPTH OF THE CENTRAL CAVITY, AND A PLURALITY OF EQUALLY DIMENSIONED SUBSTANTIALLY RADIAL POCKETS ON OPPOSITE SIDES OF EACH CORRUGATION OF THE CORRUGATED ANNULAR STRIP AND EX-
Claim 2
Dependent Claim
101 words
IN A CENTRIFUGAL LIQUID PUMP HAVING A PUMPING CHAMBER, AN INLET AND AN OUTLET, A ROTATING CENTRIFUGAL IMPELLER ROTATABLY MOUNTED IN THE PUMPING CHAMBER AND INCLUDING A CIRCULAR SIDE WALL, AND A SUBSTANTIALLY RADIALLY CORRUGATED ANNULAR STRIP OF SUBSTANTIALLY UNIFORM THICKNESS SECURED TO THE CIRCULAR SIDE WALL AND FORMING A CENTRAL CYLINDIRCAL CAVITY COMMUNICATING WITH THE INLET, AN OUTER CYLINDRICAL PERIPHERAL SURFACE COMMUNICATING WITH THE OUTLET AND OF LESSER AXIAL DEPTH THAN THE AXIAL DEPTH OF THE CENTRAL CAVITY, AND A PLURALITY OF EQUALLY DIMENSIONED SUBSTANTIALLY RADIAL POCKETS ON OPPOSITE SIDES OF EACH CORRUGATION OF THE CORRUGATED ANNULAR STRIP AND EX-
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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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |