US3663117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration pump
Assignee: Ropintassco Holdings LP
•
Filing: 1970-01-21
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Granted: 1972-05-16
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Expires: 1990-01-21
Abstract
Abstract A centrifugal pump for use in aerating liquids. A disc-shaped impeller is confined within a pump housing which includes an inlet port adjacent the center of the impeller and an outlet port formed in a volute chamber which surrounds the outer periphery of the impeller. The impeller is conventionally mounted on a drive shaft supported by bearings in the housing and includes radially extending, partially closed curved vanes on an outer side thereof. The impeller also includes short, radially extending auxiliary vanes on an inner side. The periphery of the impeller is notched between the vanes to substantially the depth of the closed portions of the vanes. At least one air inlet is provided in the pump housing near the outer ends of the impeller vanes to permit the injection of air under pressure for aerating the liquid being pumped.
Inventors
- 👤 Clinton C Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; C02F3/205; B; B01; B01F; B01F25/00; B01F25/60; B01F25/64; F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2266; F04D29/2288; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A method of conditioning a liquid by dissolving gas in said liquid comprising the steps of: continuously introducing quantities of said liquid through an inlet port into an annular chamber; continuously forcing quantities of said liquid to a confined outer portion of the annular chamber to raise the liquid pressure in said confined outer portion to a predetermined level; continuously injecting quantities of pressurized gas into the chamber proximate the confined outer portion of said annular chamber, said gas being injected at a pressure level in excess of said predetermined level; mixing said liquid and gas under pressure by moving open sided vanes through said chamber adjacent the point at which said gas is injected thus agitating said quantities of gas and liquid to facilitate solution of gas in said liquid; and continuously expelling quantities of conditioned liquid from the confined portion of the chamber through an outlet port in the chamber at the predetermined pressure level.
Claim 2
Independent Claim
157 words
A method of conditioning a liquid by dissolving gas in said liquid comprising the steps of: continuously introducing quantities of said liquid through an inlet port into an annular chamber; continuously forcing quantities of said liquid to a confined outer portion of the annular chamber to raise the liquid pressure in said confined outer portion to a predetermined level; continuously injecting quantities of pressurized gas into the chamber proximate the confined outer portion of said annular chamber, said gas being injected at a pressure level in excess of said predetermined level; mixing said liquid and gas under pressure by moving open sided vanes through said chamber adjacent the point at which said gas is injected thus agitating said quantities of gas and liquid to facilitate solution of gas in said liquid; and continuously expelling quantities of conditioned liquid from the confined portion of the chamber through an outlet port in the chamber at the predetermined pressure level.
Claim 3
Dependent Claim
177 words
A centrifugal pump for dissolution of gas into a liquid comprising: a circular housing having first and second spaced apart walls joined at their outer edges by a volute chamber; inlet port means formed in the center of said first wall for admitting liquid to said housing; outlet port means formed in said volute chamber for exhausting liquid from said housing; an impeller rotatably supported within said housing comprising a circular plate having an inner eye portion defined thereon, upstanding curved vanes secured to said plate extending between said eye portion and the outer periphery of said plate to define liquid channels between said vanes, and means secured to the upstanding edges of said vanes to cover said channels only within an inner portion of said impeller surrounding said eye portion, said plate having contoured notches formed in the outer periphery thereof between adjacent vanes; and second inlet port means formed in said housing opposite the notches in said plate for admitting gas to said housing simultaneously with the liquid admitted through said first inlet port means.
Claim 4
Dependent Claim
177 words
A centrifugal pump for dissolution of gas into a liquid comprising: a circular housing having first and second spaced apart walls joined at their outer edges by a volute chamber; inlet port means formed in the center of said first wall for admitting liquid to said housing; outlet port means formed in said volute chamber for exhausting liquid from said housing; an impeller rotatably supported within said housing comprising a circular plate having an inner eye portion defined thereon, upstanding curved vanes secured to said plate extending between said eye portion and the outer periphery of said plate to define liquid channels between said vanes, and means secured to the upstanding edges of said vanes to cover said channels only within an inner portion of said impeller surrounding said eye portion, said plate having contoured notches formed in the outer periphery thereof between adjacent vanes; and second inlet port means formed in said housing opposite the notches in said plate for admitting gas to said housing simultaneously with the liquid admitted through said first inlet port means.
Claim 5
Dependent Claim
41 words
A centrifugal pump as described in claim 2, wherein said notches extend inwardly substantially the full length of the uncovered portions of said vanes for thoroughly mixing gas injected through said second inlet port means, with liquid flowing through said channels.
Claim 6
Dependent Claim
79 words
A centrifugal pump including a rotatable impeller having an eye portion and vanes extending radially from said eye portion, said impeller having notches formed therein between adjacent vanes; and a housing confining said impeller, said housing having a fluid inlet at the eye portion thereof, and an air injection means therein positioned radially outwardly from said eye portion proximate the path of said notches for injecting air into the path of the portions of said impeller defining said notches.
Claim 7
Dependent Claim
79 words
A centrifugal pump including a rotatable impeller having an eye portion and vanes extending radially from said eye portion, said impeller having notches formed therein between adjacent vanes; and a housing confining said impeller, said housing having a fluid inlet at the eye portion thereof, and an air injection means therein positioned radially outwardly from said eye portion proximate the path of said notches for injecting air into the path of the portions of said impeller defining said notches.
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |