Hydraulic setting device

US5421294A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Manfred Ruoff · Heubach, DE
• Helmut Rembold · Stuttgart, DE
• Berthold Pfuhl · Markgröningen, DE
• Volkmar Leutner · Friolzheim, DE
• Martin Mueller · Heubach, DE

Key dates

• Filing date: Feb 28, 1994
• Grant date: Jun 6, 1995
• Expiry date: Feb 28, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/528
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The hydraulic setting device has a differential cylinder (11) whose annular space (14) is continually subjected to pressure by a pump (16). The pressure space (18) at the large piston surface is connected to the pump via a connection conduit (41). A conduit branch, which leads to a control valve (21), emerges from this connection conduit (41). At the other end, this control valve is in connection with a return conduit (26). The pressure in the conduit branch (19), and therefore in the pressure spaces (14, 18) of the differential cylinder, can be varied by appropriate activation of the control valve.