Dispensing – Automatic control – Constant weight – volume or pressure control by output
Patent
1991-02-19
1992-07-07
Shaver, Kevin P.
Dispensing
Automatic control
Constant weight, volume or pressure control by output
222 63, 222137, 222145, 222334, 222380, B67D 508, B67D 552
Patent
active
051275473
ABSTRACT:
A metering and dispensing machine that operates in accordance with the position of a cross-bar. The cross-bar is powered by a pneumatic cylinder and reciprocates two piston pumps that draw liquid from storage vessels during a back stroke. The liquid is expelled during a forward stroke through a valve and an outlet opening. The amount of liquid dispensed is determined by the pump chamber volume and pump piston draw distance. Each pump is removably secured directly to a valve block. To vary the ratio of liquids expelled from the pumps, at least one of the pumps is replaced with a larger or smaller pump. Each valve head includes a plug valve which is rotated from a fill position to a dispense position by an independent valve drive mechanism. The mechanism is actuated by sensor switches which are activated by predetermined positions of the cross-bar.
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patent: 4662540 (1987-05-01), Schroter
patent: 4830219 (1989-05-01), Siemann
Hovet Kenneth J.
Shaver Kevin P.
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