Elastomeric valve and piston structure for product dispenser

Details Elastomeric valve and piston structure for product dispenser Elastomeric valve and piston structure for product dispenser

1987-11-23

1990-06-26

Rolla, Joseph J.

Dispensing

Resilient wall

Fluid pressure generating pump or pulsator and/or removable...

222213, 222385, 222387, 222494, 2224005, 222556, 137846, B65D 3700

Patent

active

049364936

ABSTRACT:
An elastomeric piston member of a product dispenser for semi-viscous liquids includes integrally molded priming valve structure as well as check valve structure. The priming valve comprises a number of generally flat, triangular segments arranged around the periphery of an outlet conduit leading from a pumping chamber, and during a pumping stroke of the piston member, outermost tips of each segment deflect laterally to allow discharge of products from the chamber. The triangular segments are molded in an open or spaced apart orientation to facilitate manufacture, and are biased by ribs of a discharge spout toward a closed, inclined orientation in contact with adjacent segments once the dispenser is assembled.

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