Easy cleaning metering device

Dispensing – With discharge assistant – With material supply container and discharge assistant with...

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Details

222148, 222496, B67D 537

Patent

active

053399994

ABSTRACT:
A metering device includes a valve body defining a chamber extending longitudinally between an inlet and an outlet and an intake valve having an opening extending into the chamber adjacent the inlet and a metering valve having an opening extending into the chamber between the intake valve and the outlet. A tube is connected to the chamber outlet, and a reciprocable piston closure is positioned for sealing the chamber from the tube. An intake piston is positioned within the intake valve and reciprocates in operation to draw product into the chamber in a retracted position and to seal the chamber inlet in an extended position. A metering piston is positioned within the metering valve and reciprocates in operation to draw product into the chamber in a retracted position and to expel product from the chamber by forcing product to open the flap in an extended position.

REFERENCES:
patent: 3349973 (1967-10-01), Smith
patent: 3865281 (1975-02-01), Byrd et al.
patent: 4410108 (1983-10-01), Minard
patent: 4676279 (1987-06-01), von Lersner
patent: 4708269 (1987-11-01), Willerding
patent: 4842026 (1989-06-01), Nordmeyer et al.
patent: 4974754 (1990-12-01), Wirz
patent: 5108014 (1992-04-01), Nordmeyer et al.

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