Fill pump with rolling diaphragms attached by vacuum to the pist

Details Fill pump with rolling diaphragms attached by vacuum to the pist Fill pump with rolling diaphragms attached by vacuum to the pist

1997-03-28

1999-06-22

Thorpe, Timothy S.

Pumps

Motor driven

Electric or magnetic motor

417416, 417568, 92 98D, F04B 1300, F04B 4314

Patent

active

059136650

ABSTRACT:
A pump mechanism for a fill system of a packaging machine is set forth. The pump mechanism is utilized to pump a product that is dispensed by the fill system and includes a pump chamber for conducting the product therethrough. A further chamber is disposed proximate the pump chamber and a piston is disposed in the further chamber. The piston has at least one first opening in fluid communication with the further chamber and at least one second opening disposed at a head portion of the piston. The piston further includes at least one channel for providing fluid communication between the first and second openings. A first diaphragm is secured on the head portion of the piston and against the at least one second opening. As such, the first diaphragm is secured to the head portion using suction forces resulting from an underpressure communicated through the first opening to the at least one second opening via the at least one channel. The piston and first diaphragm are reciprocally movable within the further chamber and pump chamber between a first position in which the pump chamber has a first volume and a second position in which the pump chamber has a second volume that is greater than the first volume.

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