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:
Jun. 23, 1998
Filed:
Dec. 29, 1995
Applicant:
Inventor:
Ulrich Theile, Hagen, DE;
Assignee:
DORMA GmbH & Co. KG, Ennepetal, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02D / ;
U.S. Cl.
CPC ...
318469 ; 318466 ; 361 87 ; 49 28 ;
Abstract
A process for the closed-loop control and thus for the limitation of the maximum allowable force on the primary and secondary closing edges of an automatic door. This object is achieved by conducting a verification of the drive system before each movement of the door panel. During this verification, the actual value of the motor current during the startup phase is verified by means of a stored motor torque characteristic.