Patent US3558247A successfully refreshed from Google Patents.
US3558247A
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US
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Method and device for adjusting the lateral clearance in a rotary displacement pump
Assignee: Bronzavia SA
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Filing: 1968-11-22
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Granted: 1971-01-26
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Expires: 1988-11-22
Abstract
Abstract ROTARY DISPLACEMENT PUMP HAVING AT LEAST ONE ROTARY ELEMENT. TOW SIDE-WALL MEMBERS ARE DISPOSED IN THE PUMP HOUSING ON EACH SIDE OF THE ROTARY ELEMENT. AT LEAST ONE OF THE SIDE-WALL MEMBERS IS AXIALLY MOVABLE RELATIVE TO THE HOUSING AND TO THE ROTARY ELEMENT. ONE FACE OF THE MOVABLE SIDE-WALL MEMBER IS SUBJECTED ON AT LEAST A PART OF ITS FACE, TO A PRESSURE IN THE NEIGHBOURHOOD OF THE DELIVERY PRESSURE OF THE PUMP AND MEANS APPLY ON AT LEAST A PART OF THE OTHE FACE OF THE MOVABLE SIDE-WALL MEMBER A REGULATED BACK-PRESSURE WHOSE MAGNITUDE DETERMINES THE MAGNITUDE OF THE LATERAL CLEARANCE BETWEEN THE ROTARY ELEMENT AND THE SIDE-WALL MEMBERS.
Inventors
- 👤 Berthold Gaertner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0023; F04C15/0026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |