The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2020
Filed:
Feb. 06, 2018
Geze Gmbh, Leonberg, DE;
Matthias Hucker, Marxzell, DE;
André Sebastiaan Maria Jansen, Roermond, NL;
GEZE GMBH, Leonberg, DE;
Abstract
A braking device for a movable door wing comprises an electric motor operated as a generator with a motor shaft which is rotatable by a movement of the door wing and which expends motion-dependent motor voltage at a contact pair, as well as a braking circuit upon which the motor voltage is applied or applicable and via which, the contact pair is short-circuitable in order to dampen a movement of the door wing. It is provided that the braking circuit comprises two anti-serially arranged field-effect transistors wherein their drain terminals are connected each to another contact of the contact pair and wherein their source terminals are connected to each other and preferably also connected to earth or a zero line, so that the contact pair is short-circuited depending on the switching state of the field effect transistors. Alternatively or in addition to such a design of the braking circuit, provision is made that the electric motor is designed as a brushless electric motor with a plurality of stator coils, in each of which an AC voltage is induced as a function of the movement of the door wing, and that one of the AC voltages induced in the stator coils is outputted at the contact pair. The braking circuit comprises a partial braking circuit to which the alternating voltage output on the contact pair is applied or can be applied and via which, the contact pair can be short-circuited.