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:
Nov. 04, 2014
Filed:
Nov. 30, 2010
Thomas Salutzki, Witten, DE;
Volker Bienek, Dortmund, DE;
Thomas Wildförster, Schwelm, DE;
Thomas Pabst, Schwelm, DE;
Sabine Wiemann, Ennepetal, DE;
Thomas Salutzki, Witten, DE;
Volker Bienek, Dortmund, DE;
Thomas Wildförster, Schwelm, DE;
Thomas Pabst, Schwelm, DE;
Sabine Wiemann, Ennepetal, DE;
Dorma GmbH + Co. KG, Ennepetal, DE;
Abstract
A door closer, in particular a hinge door closer, including a locking function or free-swing function, having a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a hydraulic lock compartment adapted to lock the closer spring, and in particular a free-swing assembly which is adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked.