Spool valve for fluid control

Details Spool valve for fluid control Spool valve for fluid control

2011-08-23

2011-08-23

Lee, Kevin L (Department: 3753)

Fluid handling

Systems

Programmer or timer

C137S625370, C137S625380, C137S625480, C137S625670, C137S625680, C251S251000, C251S325000, C091S480000

Reissue Patent

active

RE042633

ABSTRACT:
A spool valve is provided with a stem portion that defines a fluid passageway formed by either (a) a single central support having a non-cylindrical curved surface shaped hydrodynamically, or (b) only a pair of sidewalls with, preferably, interior surfaces that are also shaped hydrodynamically. These stem passageways, which are designed to facilitate the flow of high-speed/high-pressure fluids controlled by the valve, are maintained in a predetermined orientation relative to the ports of the valve cylinders by a mechanism preferably including (a) a cam-following roller supported in a tang fixed to each spool and (b) a two-element cam that captures the roller within two of the parallel sides of a cam-track groove formed on the respective interior surfaces of each cam element.

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Abstract of Japanese Publication No. 04-191577 published Jul. 9, 1992.
Abstract of Japanese Publication No. 09-303579 published Nov. 25, 1997.
Abstract of Japanese Publication No. 07-119860 published May 12, 1995.

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