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US3720489A Expired / Lapsed US ⏱️ 0.0 years remaining

Self contained fluid pump device

Assignee: Individual
•
Filing: 1971-04-02
•
Granted: 1973-03-13
•
Expires: 1991-04-02
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Abstract

Abstract A small self contained positive displacement pump which contains no mechanical type valves, and which can be utilized to transfer a finite quantity of liquid. A flexible looped tube is placed within a groove and a pumping head is superimposed thereover. The pumping head is attached to a rotatable shaft and causes fluid to flow through the tube when a peripheral edge portion of the head collapses a marginal length of the looped tube while traveling circumferentially about the groove. The pumping head is biased into proper operative position by a combination fastener means and pressure regulator device. The pumping head is loosely captured by a portion of the main body of the pump by means of a lost motion coupling in a manner to prevent the tube from creeping longitudinally of the groove.

Inventors

  • 👤 D Raper

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 17:02
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1207

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 252 words
A pumping apparatus comprising: a housing, means forming an upwardly opening circumferentially extending annular groove in said housing, a shaft having opposed marginal end portions bent towards one another, journal means, a pumping head, and a keeper means; said journal means being concentrically arranged with respect to said annular groove and rotatably mounting one said marginal end portion of said shaFt to said housing, with the remaining marginal end portion of said shaft depending away from said housing; means for rotating said shaft; said pumping head having a downwardly depending circumferentially extending skirt member, said skirt member having a lower peripheral edge portion thereof received within said groove; means by which said pumping head is journaled to said remaining end portion of said shaft; fastener means for enabling said keeper means to be removably affixed to said remaining marginal end portion of said shaft, and in abutting relationship with respect to said pumping head, to thereby retain at least a portion of said skirt member in said groove; and a deformable tube having a looped section disposed within said groove said keeper includes an axially drilled passageway; a bushing reciprocatingly received within said passageway and adapted to be moved from one to another position; said bushing having a portion thereof adapted to engage said pumping head, biasing means urging said bushing into one position; whereby: when the keeper is affixed to the shaft, the bushing urges a portion of the skirt of the pumping head into the groove to engage the tube.
Claim 2
Dependent Claim 252 words
A pumping apparatus comprising: a housing, means forming an upwardly opening circumferentially extending annular groove in said housing, a shaft having opposed marginal end portions bent towards one another, journal means, a pumping head, and a keeper means; said journal means being concentrically arranged with respect to said annular groove and rotatably mounting one said marginal end portion of said shaFt to said housing, with the remaining marginal end portion of said shaft depending away from said housing; means for rotating said shaft; said pumping head having a downwardly depending circumferentially extending skirt member, said skirt member having a lower peripheral edge portion thereof received within said groove; means by which said pumping head is journaled to said remaining end portion of said shaft; fastener means for enabling said keeper means to be removably affixed to said remaining marginal end portion of said shaft, and in abutting relationship with respect to said pumping head, to thereby retain at least a portion of said skirt member in said groove; and a deformable tube having a looped section disposed within said groove said keeper includes an axially drilled passageway; a bushing reciprocatingly received within said passageway and adapted to be moved from one to another position; said bushing having a portion thereof adapted to engage said pumping head, biasing means urging said bushing into one position; whereby: when the keeper is affixed to the shaft, the bushing urges a portion of the skirt of the pumping head into the groove to engage the tube.
Claim 3
Dependent Claim 252 words
A pumping apparatus comprising: a housing, means forming an upwardly opening circumferentially extending annular groove in said housing, a shaft having opposed marginal end portions bent towards one another, journal means, a pumping head, and a keeper means; said journal means being concentrically arranged with respect to said annular groove and rotatably mounting one said marginal end portion of said shaFt to said housing, with the remaining marginal end portion of said shaft depending away from said housing; means for rotating said shaft; said pumping head having a downwardly depending circumferentially extending skirt member, said skirt member having a lower peripheral edge portion thereof received within said groove; means by which said pumping head is journaled to said remaining end portion of said shaft; fastener means for enabling said keeper means to be removably affixed to said remaining marginal end portion of said shaft, and in abutting relationship with respect to said pumping head, to thereby retain at least a portion of said skirt member in said groove; and a deformable tube having a looped section disposed within said groove said keeper includes an axially drilled passageway; a bushing reciprocatingly received within said passageway and adapted to be moved from one to another position; said bushing having a portion thereof adapted to engage said pumping head, biasing means urging said bushing into one position; whereby: when the keeper is affixed to the shaft, the bushing urges a portion of the skirt of the pumping head into the groove to engage the tube.
Claim 4
Dependent Claim 252 words
A pumping apparatus comprising: a housing, means forming an upwardly opening circumferentially extending annular groove in said housing, a shaft having opposed marginal end portions bent towards one another, journal means, a pumping head, and a keeper means; said journal means being concentrically arranged with respect to said annular groove and rotatably mounting one said marginal end portion of said shaFt to said housing, with the remaining marginal end portion of said shaft depending away from said housing; means for rotating said shaft; said pumping head having a downwardly depending circumferentially extending skirt member, said skirt member having a lower peripheral edge portion thereof received within said groove; means by which said pumping head is journaled to said remaining end portion of said shaft; fastener means for enabling said keeper means to be removably affixed to said remaining marginal end portion of said shaft, and in abutting relationship with respect to said pumping head, to thereby retain at least a portion of said skirt member in said groove; and a deformable tube having a looped section disposed within said groove said keeper includes an axially drilled passageway; a bushing reciprocatingly received within said passageway and adapted to be moved from one to another position; said bushing having a portion thereof adapted to engage said pumping head, biasing means urging said bushing into one position; whereby: when the keeper is affixed to the shaft, the bushing urges a portion of the skirt of the pumping head into the groove to engage the tube.
Claim 5
Dependent Claim 47 words
The pumping apparatus of claim 1 wherein said groove is defined in circumference by spaced apart shoulders; said skirt includes a pin affixed thereto and depending outwardly therefrom, said pin adapted to engage a shoulder to thereby prevent rotation of the skirt with respect to the groove.
Claim 6
Dependent Claim 28 words
The pumping apparatus of claim 2, and further including a removable wedge having opposed shoulders, said wedge adapted to be received between the opposed shoulders of said groove.
Claim 7
Dependent Claim 65 words
The pumping apparatus of claim 1 wherein said means for rotating the shaft includes an electric motor, a cylindrical battery, a cylindrical battery case adapted to slidably receive the battery therein, circuit means connecting said battery to said motor; a closure means on said case, means forming an axial aperture in said closure means, to thereby prevent said battery from being installed with reversed polarity.
Claim 8
Dependent Claim 258 words
A pumping apparatus comprising: a housing, means forming an upwardly opening circumferentially extending annular groove in said housing, a shaft having opposed marginal end portions bent towards one another, journal means, a pumping head, and a keeper means; said journal means being concentrically arranged with respect to said annular groove and rotatably mounting one said marginal end portion of said shaft to said housing, with the remaining marginal end portion of said shaft depending away from said housing; means for rotating said shaft; said pumping head having a downwardly depending circumferentially extending skirt member, said skirt member having a lower peripheral edge portion thereof received within said groove; means by which said pumping head is journaled to said remaining end portion of said shaft; fastener means for enabling said keeper means to be removably affixed to said remaining marginal end portion of said shaft, and in abutting relationship with respect to said pumping head, to thereby retain at least a portion of said skirt member in said groove; a deformable tube having a looped section disposed within said groove; said means for rotating the shaft includes an electric motor, an elongated battery having a centrally located terminal thereon; a battery case adapted to slidably receive the battery therein, circuit means electrically connecting said battery to said electric motor; a closure means on said case, means forming an axial aperture in said closure means so that when said battery is installed with reversed polarity, said terminal will be received within said axial aperture, thereby preventing reversed polarity current flow.
Claim 9
Dependent Claim 258 words
A pumping apparatus comprising: a housing, means forming an upwardly opening circumferentially extending annular groove in said housing, a shaft having opposed marginal end portions bent towards one another, journal means, a pumping head, and a keeper means; said journal means being concentrically arranged with respect to said annular groove and rotatably mounting one said marginal end portion of said shaft to said housing, with the remaining marginal end portion of said shaft depending away from said housing; means for rotating said shaft; said pumping head having a downwardly depending circumferentially extending skirt member, said skirt member having a lower peripheral edge portion thereof received within said groove; means by which said pumping head is journaled to said remaining end portion of said shaft; fastener means for enabling said keeper means to be removably affixed to said remaining marginal end portion of said shaft, and in abutting relationship with respect to said pumping head, to thereby retain at least a portion of said skirt member in said groove; a deformable tube having a looped section disposed within said groove; said means for rotating the shaft includes an electric motor, an elongated battery having a centrally located terminal thereon; a battery case adapted to slidably receive the battery therein, circuit means electrically connecting said battery to said electric motor; a closure means on said case, means forming an axial aperture in said closure means so that when said battery is installed with reversed polarity, said terminal will be received within said axial aperture, thereby preventing reversed polarity current flow.
Claim 10
Dependent Claim 47 words
The pumping apparatus of claim 8 wherein said groove is defined in circumference by spaced apart shoulders; said skirt includes a pin affixed thereto and depending outwardly therefrom, saId pin adapted to engage a shoulder to thereby prevent rotation of the skirt with respect to the groove.
Claim 11
Dependent Claim 30 words
The pumping apparatus of claim 9 wherein there is further included a removable wedge having opposed shoulders, said wedge adapted to be received between the opposed shoulders of said groove.
Claim 12
Dependent Claim 74 words
The apparatus of claim 5, wherein said keeper includes an axially drilled passageway; a bushing reciprocatingly received within said passageway and adapted to be moved from one to another position; said bushing having a portion thereof adapted to engage said pumping head, biasing means urging said bushing into one position; whereby: when the keeper is affixed to the shaft, the bushing urges a portion of the skirt of the pumping head into the groove.

References Cited (Backward Citations)

US2249806A Cited
US2752852A Cited
GB795118A Cited
US2897767A Cited
US3584983A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-12 1976-09-11 1977-03-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-12 1980-09-11 1981-03-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-12 1984-09-11 1985-03-13 $7700.00 Window Closed / Lapsed

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