Fluid handling – Systems – Multi-way valve unit
Patent
1989-12-28
1990-07-17
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
13759613, 1376253, 251282, 251324, F15B 1304
Patent
active
049415085
ABSTRACT:
A hydraulic spool valve assembly includes a pair of lands spaced apart by a groove, one land comprising a piston face, an adjacent land comprising a hydraulic flow notch, wherein the piston face includes a pair of concentric radially concave concentric. The boundary between the two concave annuli defines a convex split point annulus. The notch is oriented so as to establish a hydraulic fluid flow adapted to impact the split point annulus so as to create inversely directed radial flows across the respective concave annuli. A reverse flow component is thereby established across the groove and back toward the notch to lessen the impact of the force of the hydraulic stream against the split point annulus.
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Hennessy David R.
Wenker Dennis H.
Dana Corporation
McDonald F. B.
Michalsky Gerald A.
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