Electro-fluidic control device

US4561344A · kind A · utility

Assignee

• H. Kuhnke GmbH KG · DE

Inventors

• Harald Klocke · Malente, DE
• Uwe Thomsen · Malente, DE

Key dates

• Filing date: Feb 22, 1984
• Grant date: Dec 31, 1985
• Expiry date: Feb 22, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86614
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A device of this nature incorporates at least one control piston displaceable within a casing, the casing having at least one venting nozzle authorizing the insertion of the piston into one of its possible operating positions, which nozzle may be shut off by means of an electromagnetically operated closing device for preparation of the outward displacement of the piston out of this operating position. To accomplish that such devices may manage with a substantially reduced electrical battery power for their electromagnetic closing device, a permanent magnet is provided which co-operates with a ferromagnetic member of the closing device, in such manner that the closing device continues to be held in its closing position while the control piston is being reversed, although the supply of electrical power to the closing device had already been turned off.