Steplessly adjustable hydraulic insert valve

US9027598B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Konrad Schneider · Fellen, DE
• Liebhart Zaiser · Karlstadt, DE
• Andre Selke · Lohr am Main, DE

Key dates

• Filing date: Nov 18, 2013
• Grant date: May 12, 2015
• Expiry date: Nov 18, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86799
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A steplessly adjustable hydraulic insert valve has a housing defining a radial direction and an end side in an installation direction. An inflow connector on the end side is connectable to a pressure medium source. First and second working connectors and a return connector are arranged in the radial direction. The return connector is connectable to a pressure medium tank. The housing has an axial bore and an actuator guided movably therein. The actuator can be held in an axial center position by at least one spring and is adjustable steplessly axially out of the center position by controllable actuation. At least one of the working connectors is fluidically connectable to the return connector by axial adjustment of the actuator. The actuator has a radial widened portion with first and second control edges for steplessly opening and/or closing first and second radial openings, respectively, of the return connector.