US4086306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump
Assignee: Individual
•
Filing: 1977-02-16
•
Granted: 1978-04-25
•
Expires: 1997-02-16
Abstract
Abstract An oxygenating centrifugal pump is primarily for circulating the aerated water in a culture pond for improving water quality. The centrifugal pump generally comprises a flat-bottomed cuplike vessel having a pair of floaters for floating said pump on a water and a plurality of pipy legs for locking the vessel in a bottom of the pond. An inner hollow cylinder closed at its top end is longitudinally and rigidly mounted through a bottom wall of said vessel, an umbrella-shaped diffuser is secured to a lower periphery of said cylinder and a motor driven shaft having an impeller at its lower end portion is longitudinally mounted in said cylinder to define a diffusing passageway between said diffuser and impeller. A plurality of uniformly spaced water intake slots are provided around a peripheral wall of the upper cylindrical portion, a cover plate having several air-intake ports therethrough is rigidly secured around an upper periphery of the upper cylindrical portion, and an air suction pipe is deeply inserted therein through one of the air-intake ports. In addition, a peripheral water spouting device and a suction pump are provided on the cover plate of the hollow cylinder for blowing out a large quantity of bubbles to eliminate a possible current leakage.
Inventors
- 👤 Kaneyasu Yoshinaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:15
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; C02F3/205; A; A01; A01K; A01K63/00; A01K63/04; A01K63/047; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/233; B01F23/2334; B01F23/23342; B01F23/2336; B01F23/23363; B01F23/40; B01F23/43; B01F23/431; B01F23/45; B01F23/454; B01F35/00; B01F35/71; B01F35/712; B01F35/717; B01F35/7176; B01F35/71805; B01F35/75; B01F35/754; B01F35/75455; F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/066; B01F23/2331; B01F23/23313; B01F27/00; B01F27/05; B01F27/11; B01F27/111; B01F27/80; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
380 words
A centrifugal pump adapted to be used in a culture pond comprising; a. a flat-bottomed cup-like vessel including a large opening formed through a central portion of the bottom wall thereof and a plurality of smaller holes through a peripheral portion of said bottom wall; b. a pair of floaters diametrically positioned around an upper periphery of said vessel; c. a leg means downwardly extending from each small hole in the bottom wall, said leg means having a water intake port at the lower end portion thereof, said leg means forming an intake pipe for carrying water from said pond to said vessel and said leg means securing said vessel to said pond; d. an inner hollow cylinder closed at its top end and centrally and rigidly mounted through the large central opening of the bottom wall of said vessel and including an upper cylindrical portion having a suction chamber and a lower cylindrical portion separated by a radially extending depression formed around the peripheral wall of said inner hollow cylinder wherein said suction chamber is positioned within said vessel, said lower cylindrical portion extends downwardly below said bottom wall and said depression is seated in said large central opening; and e. said inner hollow cylinder further including a plurality of uniformly spaced water intake slots formed around a peripheral wall of the suction chamber, a cover plate rigidly secured around the upper periphery of the upper cylindrical portion, said cover plate having a plurality of air-intake ports therethrough, an air suction pipe inserted into said suction chamber through one of the air-intake ports, the lower portion of said suction pipe being below the water level, a first hub axially provided within said cover plate and a second hub axially mounted on a plurality of radial spokes at the lower end portion of the lower cylindrical portion, an umbrella-shaped diffuser mounted around a lower periphery of the lower cylindrical portion, a drive shaft coupled to a motor shaft of an electric drive motor by a coupling passing through said first and second hubs, said drive shaft protruding beyond the lower cylindrical portion, and a centrifugal impeller rigidly secured to the lower end portion of said drive shaft such that a radial passageway is defined between the diffuser and the impeller.
Claim 2
Dependent Claim
380 words
A centrifugal pump adapted to be used in a culture pond comprising; a. a flat-bottomed cup-like vessel including a large opening formed through a central portion of the bottom wall thereof and a plurality of smaller holes through a peripheral portion of said bottom wall; b. a pair of floaters diametrically positioned around an upper periphery of said vessel; c. a leg means downwardly extending from each small hole in the bottom wall, said leg means having a water intake port at the lower end portion thereof, said leg means forming an intake pipe for carrying water from said pond to said vessel and said leg means securing said vessel to said pond; d. an inner hollow cylinder closed at its top end and centrally and rigidly mounted through the large central opening of the bottom wall of said vessel and including an upper cylindrical portion having a suction chamber and a lower cylindrical portion separated by a radially extending depression formed around the peripheral wall of said inner hollow cylinder wherein said suction chamber is positioned within said vessel, said lower cylindrical portion extends downwardly below said bottom wall and said depression is seated in said large central opening; and e. said inner hollow cylinder further including a plurality of uniformly spaced water intake slots formed around a peripheral wall of the suction chamber, a cover plate rigidly secured around the upper periphery of the upper cylindrical portion, said cover plate having a plurality of air-intake ports therethrough, an air suction pipe inserted into said suction chamber through one of the air-intake ports, the lower portion of said suction pipe being below the water level, a first hub axially provided within said cover plate and a second hub axially mounted on a plurality of radial spokes at the lower end portion of the lower cylindrical portion, an umbrella-shaped diffuser mounted around a lower periphery of the lower cylindrical portion, a drive shaft coupled to a motor shaft of an electric drive motor by a coupling passing through said first and second hubs, said drive shaft protruding beyond the lower cylindrical portion, and a centrifugal impeller rigidly secured to the lower end portion of said drive shaft such that a radial passageway is defined between the diffuser and the impeller.
Claim 3
Dependent Claim
153 words
A centrifugal pump of claim 1 wherein an axial flange is longitudinally elongated from the cover plate to provide a circumferential water spouting means, and said water spouting means includes an umbrella-shaped plate, a cylindrical wall projecting downwardly from the lower middle portion of said plate, a radial wall projecting from the lower end periphery of said cylindrical wall toward a lower surface adjacent a periphery of said umbrella-shaped plate in close proximity thereto to define an annular space under said plate and a circumferential slit between each periphery, and a plurality of uniformly spaced bolts adjustably penetrating the peripheral portion of said umbrella-shaped plate to adjust the width of said slit, a suction pump mounted on said umbrella-shaped plate, a drain pipe connected to said suction pump and projecting downwardly into the annular space and a suction pipe connected to said suction pump and submerged into the water within the cup-like vessel.
Claim 4
Dependent Claim
55 words
A centrifugal pump of claim 1 wherein the lower end portion of the leg means is at a greater radial distance from the axis of said vessel than the upper end thereof thus forming a wider base for securing the vessel to the pond to stabilize said centrifugal pump at the bottom of the pond.
Claim 5
Dependent Claim
39 words
A centrifugal pump of claim 1 wherein the lower end portion of the leg means is pointed such that it easily penetrates into the bottom of the pond to secure said centrifugal pump to the bottom of the pond.
Claim 6
Dependent Claim
21 words
A centrifugal pump of claim 1 wherein each said water intake port of the leg means is provided with a strainer.
Claim 7
Dependent Claim
21 words
A centrifugal pump of claim 1 wherein each said water intake slot in the suction chamber is provided with a strainer.
References Cited (Backward Citations)
US2077445A
Cited
US1976956A
Cited
US1992451A
Cited
US2116023A
Cited
US2825541A
Cited
US3202281A
Cited
US3620512A
Cited
US3756578A
Cited
US3846516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |