Positive displacement pump having levitating magnetic piston spr

Details Positive displacement pump having levitating magnetic piston spr Positive displacement pump having levitating magnetic piston spr

1997-08-18

1998-07-28

Nguyen, Hoang

Expansible chamber devices

Rotating cylinder

Plural cylinders

92 71, 92130B, 417269, F01B 1304, F04B 112

Patent

active

057849480

ABSTRACT:
A positive displacement pump including a plurality of pistons reciprocally driven in respective cylinders by a swashplate assembly to expel fluid during the pressure stroke of the piston from a chamber in communication with each piston. Oppositely disposed magnets are located respectively in an upper pressure face of each piston and in a check valve housing adjacent each cylinder to produce a magnetic force circuit accelerating movement of each piston toward and in continual contact with a cluster bearing associated with the swashplate assembly during the suction stroke of each piston. Like poles of each magnet face each other to produce a permanent levitating force on each piston.

REFERENCES:
patent: 4355959 (1982-10-01), Kono et al.
patent: 4480961 (1984-11-01), Kono et al.
patent: 4783609 (1988-11-01), Sugiyama et al.
patent: 5100301 (1992-03-01), Hidaka et al.
patent: 5391058 (1995-02-01), Goto et al.
patent: 5407328 (1995-04-01), Kimura et al.

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