Selectable detent relief valve

Details Selectable detent relief valve Selectable detent relief valve

2005-12-20

2005-12-20

Rivell, John (Department: 3753)

Fluid handling

Systems

Line condition change responsive release of valve

C137S625210

Reexamination Certificate

active

06976504

ABSTRACT:
A selectable detent relief valve of this invention is used to operate a hydraulic detent mechanism on a manually operated spool valve. This design has three modes of operation, no-detent, continuous detent and kick-out detent. The no-detent position allows flow to pass through the relief valve, from a first port to a second port and bypass the relief function. The pressure created, disengages the detent mechanism in the spool valve. The spool always returns to neutral position as long as pressure is present. The continuous detent position blocks the flow from a first port to a second port. The kick-out detent position allows flow to pass from the first port to the second port to override (kick-out) the detent mechanism in the spool when the pressure is greater than 2600 psi.

REFERENCES:
patent: 2862518 (1958-12-01), McAlvay
patent: 2874720 (1959-02-01), Vahs
patent: 3392957 (1968-07-01), Schorer
patent: 3511276 (1970-05-01), Jessen et al.
patent: 3738379 (1973-06-01), Wilke
patent: 3818926 (1974-06-01), Wohlwend
patent: 3866880 (1975-02-01), Schexnayder
patent: 3972264 (1976-08-01), Field, Jr. et al.
patent: 4257456 (1981-03-01), Elliston
patent: 4334553 (1982-06-01), Hajek, II et al.
patent: 4339987 (1982-07-01), Stephenson et al.
patent: 4501451 (1985-02-01), Reynolds et al.
patent: 4651972 (1987-03-01), Yankoff

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