Bosch Rexroth Ag

Hydac Electronic Gmbh

Bruno Schneider

Heinz Jacobus

Michael Reinert

Matthias Stitz

Helmut Behl

Frank Hofmann

Dragoljub Djenadija

Karl J H Cords

Michael Muller

Helmut Etzel

A switchgear, especially for actuating valves, includes a housing () and a coil body () disposed in the housing. A switch element is guided in the coil body. The coil body is provided with a winding () of a conductor () that is connected to a plug connector () via contact elements (). At least some sections of the housing () and of the plug connector () are enclosed by a plastic compound (). Sealing devices () seal off the interior () of the switchgear from the surroundings (). At least one of the sealing devices () is configured as a sealing web () of a meltable material. The sealing web () is disposed on the bottom face () of a plug plate () of the plug connector () which faces the housing (). The sealing web (), in the molten connection state, seals off at least the engaging parts of the plug connector () that are connected to the housing () from the surroundings () in a fluid-tight manner by the plastic compound (), thereby eliminating the need for conventional rubber packing rings (O rings) in the area of the plug connector that are prone to failures.

Sealed-off switchgear

An unlockable non-return valve reduces the tendency of the poppet piston to jam by providing a first insert that has a guide diameter for the poppet piston over just a short section of its end side facing the piston collar, and wherein a supporting ring is arranged axially between the high-pressure seal and the first insert in a receiving element, the diameter of which is substantially smaller than the outside diameters of the inserts, the supporting ring likewise being produced from a metallic material having good sliding properties and being produced with a narrow clearance from the end section of the poppet piston and with a large radial clearance from the receiving element.

Unlockable non-return valve for very high system pressures

Growing community of inventors

Fellen, Germany

Bruno Schneider