Hydraulic control valve with manual override

US4627468A · kind A · utility

Assignee

• HUSCO International, Inc. · US

Inventors

• Raud A. Wilke · Dousman, US
• Michael J. Paik · Delafield, US

Key dates

• Filing date: Aug 30, 1985
• Grant date: Dec 9, 1986
• Expiry date: Aug 30, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/8663
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A manual override handle assembly for the operation of a hydraulic control valve of the type having a movable spool includes a housing forming a hollow chamber in which a spool extension is slidably mounted. A handle assembly extends outwardly from the housing and is mounted for pivotal movement within the chamber. The handle is movable to an inoperable position wherein the handle is disassociated from the spool extension so that movement of the spool extension will not result in movement of the handle. The handle is further movable to an operable position wherein the handle engages the spool extension so that movement of the handle results in movement of the spool extension.