Hydraulic valve section with reduced bore distortion

Details Hydraulic valve section with reduced bore distortion Hydraulic valve section with reduced bore distortion

2006-04-04

2006-04-04

Fox, John (Department: 3753)

Fluid handling

Systems

Supply and exhaust

C137S884000

Reexamination Certificate

active

07021332

ABSTRACT:
A spool valve section for a multiple valve assembly has a body with two opposing side surfaces. A plurality of mating surfaces are raised from each side surface. The mating surfaces surround the openings of fluid passages through the section and apertures for fasteners that secure the assembly together. The mating surfaces are spaced from a region of each side surface that is adjacent a bore in the body that receives a control spool. The fluid passages also are spaced from and do not intersect the spool bore. These characteristics of the spool valve section reduce distortion of the spool bore which could otherwise result from the pressure and fastening forces in the valve assembly.

REFERENCES:
patent: 4453565 (1984-06-01), Neff
patent: 4693272 (1987-09-01), Wilke
patent: 4782859 (1988-11-01), Constantinian
patent: 5529088 (1996-06-01), Asou
patent: 5715865 (1998-02-01), Wilke
patent: 6036107 (2000-03-01), Aspen et al.
patent: 6745793 (2004-06-01), Rudle
“Model 5000 Sectional Valve”, HUSCO International Catalog, 2000, 34 Pages, Waukesha, USA.

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