Spool valve apparatus and method

Details Spool valve apparatus and method Spool valve apparatus and method

2011-07-19

2011-07-19

Hepperle, Stephen M (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S625680, C091S342000, C091S350000

Reexamination Certificate

active

07980270

ABSTRACT:
Some embodiments of the present invention provide a spool valve having a spool axially movable within a sleeve of two or more stacked rings having projections extending therebetween. One or more seals on the spool can slide across surfaces of the stacked rings in movement of the spool to different positions corresponding to different states of the valve. In some embodiments, one or more of the stacked rings can have projections extending toward and contacting an adjacent ring of the sleeve, thereby maintaining desired axial positions of the rings relative to one another while providing apertures through which fluid can flow and supporting surfaces for each seal as it slides from one ring to another.

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