Viscous product dispenser

Details Viscous product dispenser Viscous product dispenser

1987-07-27

1989-08-08

Huppert, Michael S.

Dispensing

With discharge assistant

Plural

222385, G01F 1100, B67D 540

Patent

active

048544841

ABSTRACT:
A product dispenser for viscous products is described comprising a tubular container, a liquid pump dispenser, and a take-up piston which advances towards the pump dispenser as product is dispensed therethrough from the container. The take-up piston has a central depression to accommodate the lower portions of the housing of the pump dispenser when the piston reaches its uppermost location when the container is nearly fully evacuated of product. Transverse slots cut downwardly in the upper surface of the piston extend radially outwardly from the central depression to the sides of the piston to provide a means to bleed or vent off unwanted air entrapped in product which lies in the central depression.

REFERENCES:
patent: 3288334 (1966-11-01), Corsette
patent: 3420413 (1969-01-01), Corsette
patent: 4045938 (1977-09-01), Hansen
patent: 4134523 (1979-01-01), Hansen et al.
patent: 4402431 (1983-09-01), Wiegner et al.
patent: 4434916 (1984-03-01), Ruscitti et al.
patent: 4485943 (1984-12-01), Czech
patent: 4657161 (1987-04-01), Endo et al.
patent: 4694977 (1987-09-01), Graf et al.

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