US4804313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side channel self priming fuel pump having reservoir
Assignee: Goodrich Pump and Engine Control Systems Inc
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Filing: 1987-03-24
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Granted: 1989-02-14
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Expires: 2007-03-24
Abstract
Abstract A side channel pump (10) has a pumping cavity (26) which includes an inlet port (78), a discharge port (80) and side channels (72,74). An impeller (54) is mounted for rotation in the pumping cavity. A reservoir (20) holds an ample supply of liquid for pump priming and pump cooling during periods of gas pumping. A bypass suction duct (24) carries liquid from the reservoir to the pumping cavity during priming, gas pumping and normal operating and a bypass return duct (22) returns some discharged liquid to the reservoir during gas pumping and normal operation. The reservoir acts as a heat sink to enable the liquid ring formed during gas pumping operation to absorb more heat and provide pump cooling.
Inventors
- 👤 Pius J. Nasvytis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:25
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/002; F04C; F04C19/00; F04D9/00; F04D9/004; F04D9/005; F04C2210/00; F04C2210/10; F04C2210/1044
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
An improved side channel pump of the type comprising: a pump housing having an inlet and an outlet and a pumping cavity therein; the pumping cavity having a wall with an inlet port in the suction area of the wall and a discharge port in the discharge area of the wall and a circumferential side channel, the inlet being fluidly connected to the inlet port for supplying fluid thereto and the discharge port being fluidly connected to the outlet for supplying fluid thereto; and an impeller mounted in the housing for rotation in the pumping cavity, wherein the improvement comprises: a reservoir for containing a supply of liquid; a bypass suction duct for carrying liquid from the reservoir to the pumping cavity; a suction duct inlet port in the reservoir for conducting liquid in the reservoir to the bypass suction duct; a secondary inlet port in the pumping cavity wall in the suction area thereof for conducting liquid in the bypass suction duct to the pumping cavity; and means to conduct liquid in the discharge area of the pumping cavity wall to the reservoir.
Claim 2
Dependent Claim
184 words
An improved side channel pump of the type comprising: a pump housing having an inlet and an outlet and a pumping cavity therein; the pumping cavity having a wall with an inlet port in the suction area of the wall and a discharge port in the discharge area of the wall and a circumferential side channel, the inlet being fluidly connected to the inlet port for supplying fluid thereto and the discharge port being fluidly connected to the outlet for supplying fluid thereto; and an impeller mounted in the housing for rotation in the pumping cavity, wherein the improvement comprises: a reservoir for containing a supply of liquid; a bypass suction duct for carrying liquid from the reservoir to the pumping cavity; a suction duct inlet port in the reservoir for conducting liquid in the reservoir to the bypass suction duct; a secondary inlet port in the pumping cavity wall in the suction area thereof for conducting liquid in the bypass suction duct to the pumping cavity; and means to conduct liquid in the discharge area of the pumping cavity wall to the reservoir.
Claim 3
Dependent Claim
42 words
The improved side channel pump of claim 1, wherein the liquid conducting means comprises: a bypass return duct; and a secondary outlet port in fluid communication with the discharge port for conducting flow from the discharge port to the bypass return duct.
Claim 4
Dependent Claim
22 words
The improved pump of claim 1, wherein the improvement further comprises: the reservoir being formed in an extension of the pump housing.
Claim 5
Independent Claim
96 words
A method of operating a side channel pump having a suction area and a discharge area comprising: priming the pump after it attains sufficient speed by directing liquid from a reservoir to the suction area; continuing to direct liquid from the reservoir to the suction area after the pump is primed and returning at least some discharge flow to the reservoir; directing liquid from a liquid ring, which has developed during prolonged gas pumping operation, to a reservoir; and directing liquid from the reservoir to the suction area of the pump during said gas pumping operation.
Claim 6
Independent Claim
96 words
A method of operating a side channel pump having a suction area and a discharge area comprising: priming the pump after it attains sufficient speed by directing liquid from a reservoir to the suction area; continuing to direct liquid from the reservoir to the suction area after the pump is primed and returning at least some discharge flow to the reservoir; directing liquid from a liquid ring, which has developed during prolonged gas pumping operation, to a reservoir; and directing liquid from the reservoir to the suction area of the pump during said gas pumping operation.
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) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |