Adjusting switching device

US5699714A · kind A · utility

Assignee

• Flutec Fluidtechnische Gerate GmbH · DE

Inventors

• Rudiger Jung · Kelkheim, DE
• Harald Bar · Hemhofen, DE

Key dates

• Filing date: Mar 13, 1996
• Grant date: Dec 23, 1997
• Expiry date: Mar 13, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B13/01
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A switching device controlling at least one hydraulically operating apparatus has two check valves working in opposition to one another in a feed conduit and a discharge conduit, respectively. The conduits are connected to the operating apparatus, as well as to a pilot valve. Two openable nonreturn valves are connected parallel to the two check valves. The control line of one openable nonreturn valve is connected to the blocking connection of the other openable nonreturn valve. The switching device is especially for controlling a hydraulic cylinder to provide a float setting at low cost, with reliable operation, and with few components.