Demag Cranes & Components Gmbh

Terex Mhps Gmbh

Burkhard Hasenack

Giuliano Persico

Holger Freitag

Anton Münzebrock

Erik Appel

Udo Gersemsky

Wolfgang Krebs

Oliver Moll

Rüdiger Ostholt

Ralf Eising

Stefan Elspass

Michael Röhr

Jürgen Heun

Oliver Ullrich

Michael Rohr

Rudiger Ostholt

Jurgen Heun

Guilliano Persico

The invention relates to a suspended control device () which is suspended by means of a control line () connected to a unit to be controlled (). Said suspended control device is especially a control switch or a suspended push-button switch for controlling hoisting equipment, the control line () comprising electrical lines () for transmitting control signals, and a traction relief element () which is supported at the top, on the unit (), and used to absorb weight and tractive forces. The aim of the invention is to provide a suspended control device () whereby the length of the control line () can be easily changed. To this end, a storage element for receiving and releasing a defined length of the electrical lines () is provided behind the region wherein the traction relief element () is supported, seen in the direction of the unit () from the suspended control device ().

Suspended control device

A method for monitoring a chain pulley block and a chain pulley block apparatus with an electric actuator motor () that is connected at the drive side to a transmission () across a sliding clutch (). In order to achieve a safe operation of the chain pulley block, the speed of the transmission () is determined via a sensor (), the determined speed of the transmission () is compared in a control device () to the operating speed of the actuator motor () as determined from rated duty of the actuator motor () and if a deviation is found between the speed of the transmission () and the operating speed, allowing for tolerances and any transmission ratio of the transmission (), the actuator motor () is switched off.

Method of monitoring a chain pulley block and chain pulley block apparatus

An interface circuit for actuating an electrical consumer, especially a pole-changing rotary-current induction motor, with a first contact element assigned to a signal line carrying an alternating voltage signal to generate at least two different control signals. A circuit arrangement is provided for actuating an electric motor, especially a pole-changing rotary-current induction motor, with a control switch element having an aforementioned interface circuit, which is connected via a signal line to a motor control of the electric motor. In order to achieve a reduction in the number of signal lines required as compared to a parallel transmission, while at the same time preserving the easy fault diagnosis, an encoding diode () is hooked up in series before or after the first contact element () in the signal line () and a further second contact element () is arranged in parallel with the encoding diode (), so that depending on the positions of the first contact element () and the second contact element () three different control signals () can be generated.

Interface circuit for actuating an electrical device and circuit arrangement for actuating an electric motor therewith

The invention concerns a drive arrangement of a lifting gear and/or a traveling gear, with a pole-reversible rotary-current motor with windings for at least two different actuating speeds, with a pole switching element connecting the rotary-current motor to a voltage supply for changing between the actuating speeds of the rotary-current motor. In order to create a drive arrangement of a lifting gear and/or a traveling gear with a rotary-current motor, whose switching behavior is optimized in relation to the actuation of the rotary-current motor, it is proposed that a power switching element () be hooked up in front of the pole switching element (), and it can be separated from the voltage supply via the power switching element () for the pole switching process of the rotary-current motor ().

Drive arrangement, especially for a lifting mechanism and/or a traveling drive

An operating device for the manual actuation of hoisting equipment, with at least one spring-loaded switch element () for each direction of movement of the lifting device arranged in a switch housing (), wherein each switch element () includes a pressure activation mechanism (), a first electrical micro-key button (), and at least one additional control or switch element, especially another electrical micro-key button (), and the pressure activation mechanism () is arranged in front of the micro-key button () and the additional control or switch element and these can be activated in succession by means of such structure.

Operating device for manual actuation of hoisting equipment

Growing community of inventors

Hagen, Germany

Burkhard Hasenack