Patent US3272136A successfully refreshed from Google Patents.
US3272136A
Expired / Lapsed
US
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Rotary pump unit
Assignee: Flygts Pumpar AB
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Filing: 1964-04-07
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Granted: 1966-09-13
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Expires: 1984-04-07
Abstract
No abstract record available.
Inventors
- 👤 Franzen Ingmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:50
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0077; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A ROTARY PUMP UNIT HAVING A ROTARY PUMP AND AN ELECTRIC MOTOR DRIVING SAID PUMP, THE COMBINATION OF AN INNER HOUSING STRUCTURE HAVING AN INNER AND OUTER PERIPHERAL FACES AND DEFINING ON ITS INTERIOR A MOTOR CHAMBER HOUSING SAID ELECTRIC MOTOR, AN OUTER CASING STRUCTURE SURROUNDING SAID HOUSING AND HAVING AN INNER PERIPHERAL FACE DEFINING WITH SAID HOUSING AN ANNULAR CONDUIT FOR TRANSMITTING THE PUMPED FLUID, AND SEALING MEANS FOR SAID STRUCTURES FOR PROTECTION AGAINST EXPLOSION COMPRISING TOP AND BOTTOM CLOSURES HAVING OUTER PERIPHERAL FACES AND
Claim 2
Dependent Claim
87 words
IN A ROTARY PUMP UNIT HAVING A ROTARY PUMP AND AN ELECTRIC MOTOR DRIVING SAID PUMP, THE COMBINATION OF AN INNER HOUSING STRUCTURE HAVING AN INNER AND OUTER PERIPHERAL FACES AND DEFINING ON ITS INTERIOR A MOTOR CHAMBER HOUSING SAID ELECTRIC MOTOR, AN OUTER CASING STRUCTURE SURROUNDING SAID HOUSING AND HAVING AN INNER PERIPHERAL FACE DEFINING WITH SAID HOUSING AN ANNULAR CONDUIT FOR TRANSMITTING THE PUMPED FLUID, AND SEALING MEANS FOR SAID STRUCTURES FOR PROTECTION AGAINST EXPLOSION COMPRISING TOP AND BOTTOM CLOSURES HAVING OUTER PERIPHERAL FACES AND
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |