Vented screw-in proportioning valve

Details Vented screw-in proportioning valve Vented screw-in proportioning valve

1991-08-28

1992-09-08

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

303 972, F16K 1704

Patent

active

051449765

ABSTRACT:
The vented screw-in proportioning valve (30) of the present invention comprises a proportioning valve body (32) having threads (36) on the proportioning valve body (32) connected with threads (23) of a master cylinder boss (22). A stepped bore (38) of the proportioning valve body (32) includes a differential area piston which is generally U-shaped, a pair of seal members (52, 54) located axially spaced-apart and disposed about the piston (40) in order to define a vented chamber (60), a vent (62) extending through the proportioning valve body (32) and communicating with the vented chamber (60), a snap ring (70) located adjacent an inlet (34) of the proportioning valve body (32), a retainer (80) spring-biased into engagement with the snap ring (70), a spring (90) disposed between the retainer (80) and an interior cavity (42) of the piston (40) in order to bias the piston (40) toward the outlet (33), and a fluid seal (50) disposed adjacent a head (46) of the piston (40).

REFERENCES:
patent: 4000684 (1977-01-01), Ruffley
patent: 4893878 (1990-01-01), Cole et al.
patent: 4957140 (1990-09-01), Ishiwata

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