US3917431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage regenerative fluid pump
Assignee: Dresser Industries Inc
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Filing: 1973-09-18
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Granted: 1975-11-04
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Expires: 1993-09-18
Abstract
Abstract A regenerative fluid pump is described hereinafter that is capable of being operated as a vacuum pump or as a compressor. The pump is a multi-stage device and contains no seals in the conventional sense between stages. Further, the pump consists of a housing having a cylindrical bore with a cylindrical rotor rotatably located therein. The rotor operates with relatively close tolerance within the bore. End plates mounted on the housing to serve journal the rotor and to close the ends of the bore. The rotor is provided on its periphery with a plurality of rows of pockets and the interior of the housing is provided with a plurality of grooves that are in registration with the rows of pockets in the rotor. Relatively short transfer grooves extend between the rows of grooves to provide for flow of the fluid from one row to the other.
Inventors
- 👤 Willis Earl Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:09
CPC Classifications
F; F04; F04D; F04D23/00; F04D23/008; F04D17/00; F04D17/08; F04D17/16; F04D17/168; F04D5/00; F04D5/002; F04D5/003; F04D5/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
214 words
A regenerative fluid pump comprising: a generally cylindrical rotor having a plurality of pockets encircling the outer periphery thereof, said pockets being disposed in a plurality of spaced rows arranged generally parallel to the ends of said rotor, each said pocket defines a leading wall surface on said rotor that is disposed at an acute angle relative to the center-line of said rotor; a housing having first and second ends, a generally cylindrical bore extending therethrough intersecting said first and second ends and sized to closely receive said rotor, a first port extending through said housing into said bore, a pair of second ports extending through said housing into said bore and located closer to said first and second ends than said first port, a plurality of spaced grooves in said housing and partially encircling said bore and arranged generally parallel to said first and second ends, each said row being in radial alignment with a respective row of pockets in said rotor, and means for connecting said grooves to provide communication between said first port and each said second port; and, end closure means for closing each end of said bore and rotatably supporting said rotor, whereby rotation of said rotor causes fluid to flow through said pump via said ports and grooves.
Claim 2
Dependent Claim
214 words
A regenerative fluid pump comprising: a generally cylindrical rotor having a plurality of pockets encircling the outer periphery thereof, said pockets being disposed in a plurality of spaced rows arranged generally parallel to the ends of said rotor, each said pocket defines a leading wall surface on said rotor that is disposed at an acute angle relative to the center-line of said rotor; a housing having first and second ends, a generally cylindrical bore extending therethrough intersecting said first and second ends and sized to closely receive said rotor, a first port extending through said housing into said bore, a pair of second ports extending through said housing into said bore and located closer to said first and second ends than said first port, a plurality of spaced grooves in said housing and partially encircling said bore and arranged generally parallel to said first and second ends, each said row being in radial alignment with a respective row of pockets in said rotor, and means for connecting said grooves to provide communication between said first port and each said second port; and, end closure means for closing each end of said bore and rotatably supporting said rotor, whereby rotation of said rotor causes fluid to flow through said pump via said ports and grooves.
Claim 3
Dependent Claim
39 words
The regenerative fluid pump of claim 1 wherein each said pocket defines a leading wall surface on said rotor that is disposed at an acute angle relative to a radially extending plane projected through the center-line of said rotor.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |