US4178143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relative orbiting motion by synchronoously rotating scroll impellers
Assignee: United States Department of the Navy
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Filing: 1978-03-30
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Granted: 1979-12-11
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Expires: 1998-03-30
Abstract
Abstract A positive displacement pumping action is obtained from two meshed scroll ne impellers by mounting the two impellers on parallel but offset drive shafts and rotating them synchronously in the same direction.
Inventors
- 👤 William G. Thelen
- 👤 Thomas W. Bein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:57
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/02; F04C2/025; F04C15/00; F04C15/0003; F04C15/0034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A positive displacement fluid pump comprising: a casing; a pair of facing scroll vane impellers in operative meshed relationship rotatably mounted within the casing on parallel offset axes; one port through the casing terminating between the impellers near their axes of rotation and another port through the casing located radially of the impellers; means for rotating one of the impellers; ring means outwardly surrounding the scroll vanes and slidably engaging facing portions of each impeller for transmitting rotary motion from said one impeller to the other impeller while permitting relative orbital motion therebetween whereby fluid is caused to flow between the scroll vanes and through the ports; and means for adjusting the distance between the impeller axes for controlling pump output.
Claim 2
Dependent Claim
121 words
A positive displacement fluid pump comprising: a casing; a pair of facing scroll vane impellers in operative meshed relationship rotatably mounted within the casing on parallel offset axes; one port through the casing terminating between the impellers near their axes of rotation and another port through the casing located radially of the impellers; means for rotating one of the impellers; ring means outwardly surrounding the scroll vanes and slidably engaging facing portions of each impeller for transmitting rotary motion from said one impeller to the other impeller while permitting relative orbital motion therebetween whereby fluid is caused to flow between the scroll vanes and through the ports; and means for adjusting the distance between the impeller axes for controlling pump output.
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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |