Driving device, in particular for a proportioning pump of the pi

Details Driving device, in particular for a proportioning pump of the pi Driving device, in particular for a proportioning pump of the pi

1986-08-22

1988-11-22

Garrett, Robert E.

Motors: expansible chamber type

Cyclically operable

Distributor actuator extends into working chamber

91344, 91350, 13762414, 251 75, 92 7, F01L 2300

Patent

active

047857137

ABSTRACT:
In a driving device of the piston-flowmeter type, in particular for a proportioning pump, a distributor is mounted at one end of a piston cylinder for controlling the admission and discharge of fluid within two chambers formed respectively on each side of the piston. The distributor body is provided with circular flow passages and two pairs of valve-seats in cooperating relation with two seals of a two-position tubular valve. The valve has a central bore traversed by the piston rod and coupled to a resilient bistable mechanism for reversing the state of the valve and maintaining it in either of its two positions.

REFERENCES:
patent: 546096 (1885-10-01), Frizell
patent: 1507821 (1924-09-01), Folberth
patent: 2222141 (1940-11-01), Denison
patent: 3053435 (1962-09-01), Sanders
patent: 3882900 (1975-05-01), Williams
patent: 4558719 (1985-12-01), Rinkewich

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