Hydraulic valve

Details Hydraulic valve Hydraulic valve

1992-05-08

1993-06-29

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762566, 251368, F15B 13042, F16K 324

Patent

active

052225216

ABSTRACT:
A high speed high-performance valve member has a spool that is movable within a cylindrical cavity of a valve body or sleeve. The spool and sleeve are both formed of hardened stainless steel, but the bearing surfaces and lands of the spool are provided with a deposition layer of titanium nitride to give the bearing surface a hard smooth finish. The differential hardness between the spool and sleeve prevents galling. Damage due to cavitation is avoided, and the valve has a failure rate reduced by a factor of about twenty.

REFERENCES:
patent: 2985566 (1961-05-01), Tsien et al.
patent: 3685965 (1972-08-01), McClure
patent: 4337797 (1982-07-01), Caruso
patent: 4593719 (1986-06-01), Leonard
Mertz, M27/623 Servo Hydraulic Vibrator (advt), 1991.
Heaviquip, Hemi 50 Vibrator, 1990.

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