Dispensing – With discharge assistant – With material supply container and discharge assistant with...
Patent
1991-06-18
1994-08-23
Shaver, Kevin F.
Dispensing
With discharge assistant
With material supply container and discharge assistant with...
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:
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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.
Nestec S.A.
Shaver Kevin F.
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