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US3791771A Expired / Lapsed US ⏱️ 0.0 years remaining

Pump having magnetically driven reciprocating pistons

Assignee: Individual
•
Filing: 1971-12-23
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Granted: 1974-02-12
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Expires: 1991-12-23
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Abstract

Abstract A pump wherein the pumping takes place in an elongated chamber having first and second magnetic material piston members therein, at least one member being moveable and at least said one moveable member having check valve means therein so that liquid is flowed through the check valve means as the members are separating and the relative movement towards each other of the sections closes the check valve means. A unidirectional flow outlet between the members allows the liquid to be pumped out by the relative movement of the piston members. Facing each other on the outside of the chamber are first and second horseshoe electromagnets with first and second coils around each horseshoe. Connected to the first set of coils is an AC to DC converter to supply DC power to the coil, whereas the second coil has a line for connection to an AC source. The first coil, the converter and the second coil are in series so that the first horseshoe magnet presents alternating North and South poles, while the second horseshoe magnet has fixed North and South poles. When plugged into a line, the fixed poles are alternately presented with a similar and a different opposed pole. This causes the moveable piston members to be attracted to the poles on one cycle and be attracted to each other on the next cycle by virtue of the tendency of the pistons to move in the direction of maximum magnetic flux linkage, thus pumping the fluid.

Inventors

  • 👤 J Roesel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 19:09
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/046

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 180 words
A pump comprising in combination: a. a chamber of non-magnetic material defining a cylinder for at least one reciprocating paramagnetic piston therein; b. a pair of paramagnetic piston members, at least one member being reciprocably moveable therein; c. at least one check valve means integral with said one moveable member; d. first and second horseshoe electromagnets each with first and second armature ends comprising poles, an electrical coil wound about each armature end, said magnets being adapted and disposed to that the first and second armature ends of said first and second electromagnets and said poles are juxtaposed from each other across said chamber; and, e. a DC power supply connected to one of said electromagnets; an AC power supply connected to said other of said electromagnets whereby AC current flows through one electromagnet and DC current through the second electromagnet causing said pair of paramagnetic piston members to tend to either be aligned with and repelled by said poles on alternate half-cycle of said AC power, so as to pump liquid flowing through at least said one check valve.
Claim 2
Dependent Claim 180 words
A pump comprising in combination: a. a chamber of non-magnetic material defining a cylinder for at least one reciprocating paramagnetic piston therein; b. a pair of paramagnetic piston members, at least one member being reciprocably moveable therein; c. at least one check valve means integral with said one moveable member; d. first and second horseshoe electromagnets each with first and second armature ends comprising poles, an electrical coil wound about each armature end, said magnets being adapted and disposed to that the first and second armature ends of said first and second electromagnets and said poles are juxtaposed from each other across said chamber; and, e. a DC power supply connected to one of said electromagnets; an AC power supply connected to said other of said electromagnets whereby AC current flows through one electromagnet and DC current through the second electromagnet causing said pair of paramagnetic piston members to tend to either be aligned with and repelled by said poles on alternate half-cycle of said AC power, so as to pump liquid flowing through at least said one check valve.
Claim 3
Dependent Claim 14 words
A pump as claimed in Claim 1, wherein said chamber is an elongated chamber.
Claim 4
Dependent Claim 18 words
A pump claimed in claim 1, wherein each of said pair of paramagnetic piston members are reciprocably moveable.
Claim 5
Dependent Claim 29 words
A pump as claimed in claim 1, said chamber being an elongated cylindrical chamber, said electromagnets having curved pole faces which hug the outer wall of the cylindrical chamber.
Claim 6
Dependent Claim 35 words
A pump as claimed in claim 3, wherein each paramagnetic piston is provided with a paramagnetic -free check valve allowing fluid flow towards each piston, and a discharge outlet in said chamber between said members.
Claim 7
Dependent Claim 36 words
A pump as claimed in claim 3, wherein each paramagnetic piston is provided with a paramagnetic -free check valve allowing fluid flow toward one end of said chamber, and a discharge outlet at said one end.
Claim 8
Dependent Claim 109 words
A pump as claimed in claim 4, said at least one check valve means comprsing a first drum section with openings therein, said first drum section having an inner side; a disk shim on said inner side disposed for short inward movement away from said first drum; a second drum section of paramagnetic material axially aligned with said first drum section also with openings therein, said second drum section having a plurality of laminated pieces parallel to the drum axis serving to increase permeability of this section and a stop between said second drum sections openings and said shim preventing said shim from closing said second drum section openings.

References Cited (Backward Citations)

US1314448A Cited
US1556059A Cited
US1978866A Cited
US2605042A Cited
US3196797A Cited
US3659968A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-11 1977-08-13 1978-02-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-11 1981-08-13 1982-02-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-11 1985-08-13 1986-02-12 $7700.00 Window Closed / Lapsed

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