Patent US3589843A successfully refreshed from Google Patents.
US3589843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump with intermeshing helical ribs
Assignee: Warren Pumps LLC
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Filing: 1969-02-14
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Granted: 1971-06-29
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Expires: 1989-02-14
Abstract
Abstract A rotary pump for liquids comprising a double cylinder housing of symmetrical form containing a driving and a driven rotor carrying two pairs of intermeshing helical ribs, and a pair of intermeshing gears, a covered plate on one end of the housing for supporting a thrust bearing for the driving rotor and a journal bearing for the driven rotor, a plate on the other end of the housing for supporting a journal bearing for each rotor, and a gear housing on the latter plate to form a lubricant chamber for the intermeshing gears.
Inventors
- 👤 Albert A Zalis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:58
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
A rotary pump comprising a double bored housing with a central high-pressure discharge port containing a driving and a driven rotor, each rotor having two sets of intermeshing helical ribs which are of opposite hand separated in the middle of the rotor adjacent the said discharge port, and each rotor also having intermeshing gears to keep the two rotors in synchronism with each other, each rotor being located eccentrically of its bore with the eccentricity in the direction away from the highpressure discharge port, a cover plate on one end of the housing for supporting bearings for the driving rotor and the driven rotor, a platE on the other end of the housing for supporting a bearing for each rotor, and intermeshing gears on the two rotors to keep them in synchronism with each other, each rotor being integrally formed with a large diameter portion located between the helical ribs, and a plurality of accurately machined doweland-socket arrangements extending between said housing and said plates.
Claim 2
Dependent Claim
165 words
A rotary pump comprising a double bored housing with a central high-pressure discharge port containing a driving and a driven rotor, each rotor having two sets of intermeshing helical ribs which are of opposite hand separated in the middle of the rotor adjacent the said discharge port, and each rotor also having intermeshing gears to keep the two rotors in synchronism with each other, each rotor being located eccentrically of its bore with the eccentricity in the direction away from the highpressure discharge port, a cover plate on one end of the housing for supporting bearings for the driving rotor and the driven rotor, a platE on the other end of the housing for supporting a bearing for each rotor, and intermeshing gears on the two rotors to keep them in synchronism with each other, each rotor being integrally formed with a large diameter portion located between the helical ribs, and a plurality of accurately machined doweland-socket arrangements extending between said housing and said plates.
Claim 3
Dependent Claim
185 words
A rotary pump comprising a double bored housing with a central high-pressure discharge port containing a driving and a driven rotor, each having two sets of intermeshing helical ribs which are of opposite hand separated in the middle of the rotor adjacent the said discharge port, and means comprising intermeshing gears to keep the two rotors in synchronism with each other, a cover and plate on one end of the housing supporting bearings for the driving rotor and the driven rotor, a second plate on the other end of the housing supporting a bearing for each rotor, a cover member on the second plate to keep the intermeshing gears supplied with lubricant, each rotor being integrally formed with a large diameter portion located between the helical ribs for resistance against deflection of the rotor at its central portion, the plates being accurately located on the housing for the location of the axis of the rotors spaced from and parallel to the axes of the bores, and seals located between the rotor portions in the housing containing the fluid to be pumped and the bearing plates.
Claim 4
Dependent Claim
185 words
A rotary pump comprising a double bored housing with a central high-pressure discharge port containing a driving and a driven rotor, each having two sets of intermeshing helical ribs which are of opposite hand separated in the middle of the rotor adjacent the said discharge port, and means comprising intermeshing gears to keep the two rotors in synchronism with each other, a cover and plate on one end of the housing supporting bearings for the driving rotor and the driven rotor, a second plate on the other end of the housing supporting a bearing for each rotor, a cover member on the second plate to keep the intermeshing gears supplied with lubricant, each rotor being integrally formed with a large diameter portion located between the helical ribs for resistance against deflection of the rotor at its central portion, the plates being accurately located on the housing for the location of the axis of the rotors spaced from and parallel to the axes of the bores, and seals located between the rotor portions in the housing containing the fluid to be pumped and the bearing plates.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |