Positive-displacement pump

Details Positive-displacement pump Positive-displacement pump

1995-06-06

1997-08-12

Freay, Charles G.

Pumps

Three or more cylinders arranged in parallel, radial, or...

417201, 417205, 417900, F04B 2308, F04B 112

Patent

active

056558910

ABSTRACT:
The pump includes two pistons 10 each sliding in a cylinder 11. These are fed by a screw 21 through ports 12. Upon delivery, a rotary valve 6 turning in a bearing 1A2 in succession closes off and uncovers the passages 1A1 from the cylinders. This rotary valve 6 includes an axial bore 61 and a slot 62 through which the material collected from the cylinders passes in the direction of the outlet orifice of the pump.

REFERENCES:
patent: 3143076 (1964-08-01), Pyritz
patent: 3295451 (1967-01-01), Smith
patent: 3327640 (1967-06-01), Townsend
patent: 3411294 (1968-11-01), Hedermann
patent: 4756239 (1988-07-01), Hattori et al.
patent: 4838765 (1989-06-01), Wostof et al.
patent: 5261795 (1993-11-01), Laurent et al.
patent: 5336052 (1994-08-01), Zollner et al.

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