Servo control valve for a hydraulically-actuated device

Details Servo control valve for a hydraulically-actuated device Servo control valve for a hydraulically-actuated device

1998-01-09

1999-11-02

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

1376256, 13762568, F15B 13043

Patent

active

059751398

ABSTRACT:
A servo control valve includes a valve body that defines a high pressure passage, a low pressure passage and a flow passage. A valve member has a first pressure surface in opposition to a control pressure surface. The valve member is positioned in the valve body and moveable between a first position in which the high pressure passage is open to the flow passage, and a second position in which the low pressure passage is open to the flow passage. A pilot member is positioned in the valve body and is moveable between an up position in which the control pressure surface is exposed to pressure in the high pressure passage, and a down position in which the control pressure surface is exposed to pressure in the low pressure passage. A spring is operably positioned to bias a valve member toward one of its first position and its second position.

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patent: 5720318 (1998-02-01), Nagarajan et al.

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