Dripless valve

Details Dripless valve Dripless valve

1982-12-06

1985-05-14

Rolla, Joseph J.

Dispensing

With resilient biasing means for outlet element

For movable tubes, sleeves, or apertured caps

222571, 141116, 239119, B05B 128

Patent

active

045167028

ABSTRACT:
A valve for applying a flowable material in which it is desired to provide a sharp cutoff in application of the material includes a valve body with a chamber therein in communication with a source of the material to be applied. A movable piston is positioned within the valve body and there is a passage in the piston opening to the chamber with the passage terminating in an application opening. A movable valve stem is positioned to open and close upon the passage chamber opening to control the flow of material to the passage and application opening. A negative pressure is created at the application opening at or immediately after closure of the valve stem upon the passage chamber opening to thereby provide a sharp cutoff in the application of the material from the opening.

REFERENCES:
patent: 2619116 (1952-11-01), Ralston
patent: 3547148 (1970-12-01), Drori
patent: 3806084 (1974-04-01), Seese
patent: 4062480 (1977-12-01), Bjorklund
patent: 4142707 (1979-03-01), Bjorklund
patent: 4149315 (1979-04-01), Page et al.

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