Time delay fluid valve

Details Time delay fluid valve Time delay fluid valve

1978-07-31

1980-09-02

Cline, William R.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

137544, 138 43, 251 47, F16K 31122, F16K 5100

Patent

active

042201730

ABSTRACT:
A fluid operated valve device which effects a time delay in the shifting of a main valve spool. Pressurized pilot fluid is metered at a controlled rate through an air filter and a spiral groove which is restricted in size to delay the pressure build up of the fluid. When the pressure builds up sufficiently, a timer piston is shifted to break its seal with the main valve spool so that fluid can pass through the piston into a pressure chamber. The fluid pressure in the chamber shifts the main valve spool to control application of fluid to the load. When the pilot pressure is relieved, fluid flows at a high speed along a return path that passes the base of the air filter to create a suction effect which extracts dirt from the filter and purges it from the system. The pressure reduction allows springs to return the main valve spool and the timer piston into sealing position. A sleeve cooperates with the pilot circuit and the timer piston to compensate for increased pilot pressure such that the time delay changes predictably with pressure changes.

REFERENCES:
patent: 1754138 (1930-04-01), Agee
patent: 2580433 (1952-01-01), Kain
patent: 2661766 (1953-12-01), Adams
patent: 2830784 (1958-04-01), Placette
patent: 3385166 (1968-05-01), Kroffke
patent: 3430652 (1969-03-01), Struck

Affiliated with

Also associated with

Rating

Time delay fluid valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Time delay fluid valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time delay fluid valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1704876