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Patent US2973000A successfully refreshed from Google Patents.
US3136258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump
Assignee: MOWID ANSTALT
•
Filing: 1961-06-01
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Granted: 1964-06-09
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Expires: 1981-06-01
Abstract
No abstract record available.
Inventors
- 👤 Bood Louris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:13
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PUMP COMPRISING A WATER-TIGHT CASING DEFINING A MOTOR COMPARTMENT THEREIN, MOTOR MEANS INCLUDING A SHAFT ROTATABLE THEREBY DISPOSED IN SAID MOTOR COMPARTMENT, AN OIL-FILLED SEALING CHAMBER DISPOSED AT ONE END OF SAID WATER-TIGHT CASING THROUGH WHICH SAID SHAFT PASSES, A PUMP COMPARTMENT HAVING AN INLET OPENING, SAID PUMP COMPARTMENT BEING DISPOSED ADJACENT SAID OIL-FILLED SEALING CHAMBER, A DISCHARGE OPENING DISPOSED FROM SAID PUMP COMPARTMENT, AND A PUMP FAN MOUNTED ON SAID SHAFT WITHIN SAID PUMP COMPARTMENT TO DRAW A FLUID THEREIN THROUGH SAID INLET OPENING AND DISCHARGE SAID FLUID THROUGH SAID DISCHARGE OPENING, SAID WATER TIGHT CASING HAVING A LENGTHENED PART INCLUDING END PORTIONS SURROUNDING SAID OIL FILLED SEALING CHAMBER AND BEING SUBSTANTIALLY EQUIDISTANTLY
Claim 2
Dependent Claim
115 words
A PUMP COMPRISING A WATER-TIGHT CASING DEFINING A MOTOR COMPARTMENT THEREIN, MOTOR MEANS INCLUDING A SHAFT ROTATABLE THEREBY DISPOSED IN SAID MOTOR COMPARTMENT, AN OIL-FILLED SEALING CHAMBER DISPOSED AT ONE END OF SAID WATER-TIGHT CASING THROUGH WHICH SAID SHAFT PASSES, A PUMP COMPARTMENT HAVING AN INLET OPENING, SAID PUMP COMPARTMENT BEING DISPOSED ADJACENT SAID OIL-FILLED SEALING CHAMBER, A DISCHARGE OPENING DISPOSED FROM SAID PUMP COMPARTMENT, AND A PUMP FAN MOUNTED ON SAID SHAFT WITHIN SAID PUMP COMPARTMENT TO DRAW A FLUID THEREIN THROUGH SAID INLET OPENING AND DISCHARGE SAID FLUID THROUGH SAID DISCHARGE OPENING, SAID WATER TIGHT CASING HAVING A LENGTHENED PART INCLUDING END PORTIONS SURROUNDING SAID OIL FILLED SEALING CHAMBER AND BEING SUBSTANTIALLY EQUIDISTANTLY
References Cited (Backward Citations)
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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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |