Pulseless, reversible precision piston-array pump

Details Pulseless, reversible precision piston-array pump Pulseless, reversible precision piston-array pump

1999-04-16

2000-06-27

Thorpe, Timothy S.

Expansible chamber devices

Relatively movable working members

Interconnected with common rotatable shaft

417269, 91499, F01B 304

Patent

active

060793139

ABSTRACT:
A pulseless, reversible, precision piston-array pump. The pump head has a cylindrical body which rotates inside a cylindrical casing. A cam cap closes one end of the pump body, and a port cap the other end. The cam cap has on its interior surface a groove which controls the timing and depth of the piston strokes. The port cap has on its interior surface an inlet valve groove and an outlet valve groove to provide the valving action which controls the direction of fluid flow. At all times during the operation of the pump, at least one piston is in a compression mode; At least one piston is in a suction mode; and at least one piston is in a null mode, performing neither compression nor suction while moving across the port cap. This design decouples the rotary movement of the cylindrical body from the linear movement of the pistons, to provide pulseless flow for the pump.

REFERENCES:
patent: 2310459 (1943-02-01), Potter
patent: 2518619 (1950-08-01), Huba
patent: 2745350 (1956-05-01), Capsek
patent: 3981360 (1976-09-01), Leduc et al.
patent: 4095921 (1978-06-01), Hinaga et al.
patent: 4360321 (1982-11-01), Copp, Jr. et al.
patent: 4880361 (1989-11-01), Ikeda et al.
patent: 5009574 (1991-04-01), Ikeda et al.
patent: 5167181 (1992-12-01), Ken Lee
patent: 5253981 (1993-10-01), Yang et al.
patent: 5733105 (1998-03-01), Beckett et al.

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