Device for dispensing liquid having an improved seal assembly

Details Device for dispensing liquid having an improved seal assembly Device for dispensing liquid having an improved seal assembly

2007-02-27

2007-02-27

Kaufman, Joseph A. (Department: 3754)

Dispensing

With discharge assistant

Container with follower

C222S504000, C222S518000

Reexamination Certificate

active

10905250

ABSTRACT:
A device for dispensing a liquid includes a dispenser body having a liquid passage and an air passage. A valve stem is mounted in the dispenser body and reciprocates between an open position allowing liquid flow and a closed position preventing liquid flow. A pre-assembled unitary seal assembly is threadably engaged with the dispenser body and includes a housing having a bore therethrough. The housing includes a first and second seal members positioned within the bore that each form a dynamic seal with the valve stem to prevent air and liquid from leaking out of the air and liquid passages. The housing further includes a static seal between the outside of the housing and the dispenser body. The valve stem may be moved to an open position by pressurized air acting on a piston and moved to the closed position by a spring-return mechanism to selectively dispense the liquid.

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Nordson Corporation,UM22 Series Universal™ Modules, Brochure, 2004, 2 pgs.
Nordson Corporation,UM25 Series Universal™ Modules, Brochure, 2004, 2 pgs.

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