Hydraulic actuation device

US6237334A · kind A · utility

Assignee

• Mannesmann Sachs AG · DE

Inventors

• Boleslaw Tulaczko · Niederwerrn, DE
• Volker Stampf · Schweinfurt, DE

Key dates

• Filing date: May 3, 1999
• Grant date: May 29, 2001
• Expiry date: May 3, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B21/044
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic actuation device for the adjustment of units in motor vehicles includes a piston-cylinder unit with a housing and a piston displaceably arranged in the cylinder portion of the housing and/or in a guide sleeve in the housing. The piston-cylinder unit may be a slave cylinder or a master cylinder. The cylinder has a connection channel along one of its surface lines with an outer channel wall which is located in a portion of the connection channel located farthest from a center axis of the cylinder. The outer channel wall approximately follows a straight line and has an angle of inclination relative to the center axis which is greater than zero and preferably equal to or greater than a maximum installation angle of the installed position of the housing. The described arrangement of the deaeration bore hole at the highest possible location in the pressure space of the cylinder is advantageous for a deaeration of the hydraulic system for repairs and servicing.