Spool type change-over valve

Details Spool type change-over valve Spool type change-over valve

1994-02-16

1995-09-05

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13759618, 13762569, 137884, F15B 1308, F15B 13042

Patent

active

054471761

ABSTRACT:
In a pilot-driven spool type change-over valve, a lateral width of a valve body and sizes of each port and valve hole are efficiently determined in such a manner that flow rate or fluid per unit time reaches the highest value without substantially impairing responsiveness in order to increase ability to change over the fluid. An inner diameter of the valve hole a lateral length of an opening of the port are set to substantially the highest value as determined by lateral width of the valve body, and longitudinal diameter a of an opening of each port, i.e. length in axial direction in the valve hole, is set to such a size that a characteristic value given by a/W.sup.2 is 1.5 to 2.2.times.10.sup.-2.

REFERENCES:
patent: 3324885 (1967-06-01), Beech
patent: 3902526 (1975-09-01), Brake et al.
patent: 4856560 (1989-08-01), Neff et al.
patent: 5333647 (1994-08-01), Fukano et al.

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