Robert Boschgmbh

Bosch Rexroth Ag

Hermann Sanzenbacher

Roland Schempp

Volkmar Leutner

Joachim Heiser

Heinz Flaschar

Joachim Zumbraegel

Heinz Gand

Heinz Kleinschmidt

Peter Kroll

Klaus Sopha

Rainer Hoheisel

Uwe Baerenwaldt

Jerg Braun

Konrad Braunlinger

The invention discloses methods for the production of pressure pipes of a tractive solenoid for a hydraulic valve and pressure pipes that are manufactured using these methods, wherein the pressure pipes are thermally joined.

Methods for the production of a pressure pipe of an electric hoisting magnet and pressure pipe of a hoisting magnet

An electromagnet () for actuating a hydraulic on-off valve (), has a wet-type configuration and its armature () is displaced in a pressure pipe () when a volume of oil is switched through a throttling site () in such a way that switching speed can be influenced. The electromagnet () has a manual emergency actuation device () in the pressure pipe (). If necessary, the actuating bolts () of said device can be engaged with a throttle screw () by an interlocking connection () in order to displace said throttle screw that is arranged in the armature (). The switching speed of the distributing valve () can be easily regulated from the outside when the electromagnets () are mounted, without impairing functioning of the manual emergency actuation device.

Electromagnet for actuating a hydraulic valve

Electromagnetically operated directional valve

A hydraulic control system has a three-position valve which in its central position disconnects the high-pressure and low-pressure sides of a pressure source from outlet lines but connects these sides of the source together through a low-pressure valve. Moved to either of its end positions the valve is disconnected from between the sides of the pressure source and the output lines are connected to the high-pressure and low-pressure source sides. A pressure-limiting valve is connected between the sides of the source. In addition, the high-pressure side is connected via pressure-reducing valve and a restriction to a pair of pilot valves which are in turn connected to the low-pressure side. These pilot valves are also connected to opposite chambers of a pilot cylinder that controls the valve body. The pressure-reducing valve between the pilot valves and the high-pressure side maintains a medium-pressure level in the system when the valves move from its central position.

Hydraulic control system

Growing community of inventors

Schwieberdingen, Germany

Hermann Sanzenbacher