Slow start valve

Details Slow start valve Slow start valve

1996-04-05

1997-09-23

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91 29, 137110, F15B 13043, F15B 2110

Patent

active

056694229

ABSTRACT:
A slow start valve has a first valve member for opening and blocking a flow passage between an inlet port and an outlet port and a second valve member for opening and blocking a flow passage between the outlet port and an exhaust port, both being integrally formed in a spool without adopting a poppet construction, wherein the actuation of the spool by force of compressed air causes slow supply, quick supply and exhaust. Compressed air supplied via a solenoid three-way valve causes a piston to move downward along with the spool in contact therewith and then compressed air supplied via a passage causes the spool to move further downward, a second valve opening being immediately shut off with the second valve member.

REFERENCES:
patent: Re30403 (1980-09-01), Bitonti
patent: 5067519 (1991-11-01), Russell et al.
patent: 5337788 (1994-08-01), Nelson

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