Dorma Gmbh + Co. Kg

Dorma Deutschland Gmbh

Dormakaba Deutschland Gmbh

Wolfgang Semelka

Thomas Salutzki

Thomas Schmitz

Felix Böse

Stefan Ulrich

Michael Scheu Gen Mecker

Frank HÜTTENMEISTER

Dennis Meiering

Martin Boekhoff

Mike Schüller

A power-assisted door closer includes an output shaft, a driving mechanism operatively connected to the output shaft, a mechanical energy accumulator for storing closing energy for the door leaf and acting upon the driving mechanism, a motor/generator unit operatively connected to the output shaft and an electrical energy accumulator for storing an assisting energy for the door leaf and being electrically connected to the motor/generator unit.

Servo door-closer

A sensor arrangement for monitoring a spatial area of least one motor-driven wing of a door includes a plurality of primary transmitters emitting beams of radiation toward a spatial area, and a plurality of primary receivers arranged to receive radiation from the primary transmitters which is reflected in the spatial area, the receivers generating a signal to actuate the motor driving the wing. A plurality of auxiliary transmitters are arranged next to respective primary receivers and emit auxiliary beams of radiation toward the spatial area, and a plurality of auxiliary receivers are arranged next to the primary transmitters to receive radiation from the auxiliary transmitters. A transmitter emits radiation and a receiver reacts to a reflection of the beam differing in intensity and produces a signal which controls the actuation of the door. Each transmitter is associated with an auxiliary receiver and each receiver is associated with an auxiliary transmitter in order to develop a sensor arrangement with increased security and reliability.

Sensor arrangement for monitoring a spatial area

Growing community of inventors

Witten, Germany

Wolfgang Semelka