Fluid handling – Systems – Multi-way valve unit
Patent
1985-05-06
1986-09-16
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
13762569, 2511291, 25112915, 251337, F15B 13044, F16K 3106
Patent
active
046116320
ABSTRACT:
A hydraulic solenoid valve having a self-contained spool positioning spring and washer solenoid tube assembly. The valve body is provided with a novel arrangement of ports providing for minimized pressure differential between the opposite ends of the valve chamber so as to facilitate positioning of the spool and permit utilization of a light biasing spring and high force solenoids. The port configuration permits minimizing the overall height of the valve body while yet providing for a relatively large cross section tank port, providing the desirable low pressure differential between the opposite ends of the valve chamber. The biasing assemblies further provide for reduced effect of the pressure differential on the spool valve end shafts, thereby further facilitating repositioning of the spool in the neutral position by the biasing springs. Any one of a plurality of different strength springs may be utilized in the biasing assembly, wherein the springs are removably retained by a removable lock ring cooperating with the washer which serves as a spring retainer at one end of the spring.
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patent: 4313468 (1982-02-01), Patel
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patent: 4422475 (1983-12-01), Aspinwall
patent: 4526201 (1985-07-01), Geyler et al.
Kazi Shaukat
Kolchinsky Abel E.
Baumann Russell E.
Imperial Clevite Inc.
Michalsky Gerald A.
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