Shut-off valve for sprayer

Details Shut-off valve for sprayer Shut-off valve for sprayer

1988-07-18

1990-06-12

Rivell, John

Valves and valve actuation

Balanced valves

Reciprocating

251325, F16K 3904

Patent

active

049335693

ABSTRACT:
The present invention relates to a valve with a reciprocating piston between two oppositely-acting fluid balance chambers. The static and dynamic pressures of the fluid being dispensed creates a force in each balance chamber. However, these force vectors are of equal magnitude but opposite direction thereby resulting in no net force on the piston. This allows for the elimination of a spring compensating for fluid pressures on the piston. An internal flow passage is used within the piston so as to simplify the design and increase reliability.

REFERENCES:
patent: 1259298 (1918-03-01), Scheid
patent: 2307949 (1943-01-01), Phillips
patent: 2485192 (1949-10-01), Eickstaedt
patent: 2939675 (1960-06-01), Karden
patent: 3140830 (1964-07-01), Ingold
patent: 3294362 (1966-12-01), Schultz et al.
patent: 3419197 (1968-12-01), Battaglia
patent: 4027851 (1977-06-01), Schlotman
patent: 4106750 (1978-08-01), Karden et al.
patent: 4764047 (1988-08-01), Johnston et al.

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