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:
Feb. 14, 1989
Filed:
Jul. 10, 1987
Horst Stockermann, Sauerlach, DE;
Herman Bohm, Augsburg, DE;
Josef Grober, Munich, DE;
Wolfgang David, Donauworth, DE;
Messerschmitt-Bolkow-Blohm GmbH, Munich, DE;
Abstract
To provide, for a sliding door with a pneumatically operated door panel servomotor, a safety device which operates independently of the usual reversing device and which limits the maximally active door closing force to an exactly settable value in a simple and reliable manner, there is associated with the servomotor, a limit value control circuit with a closing force sensor which senses the reaction force of the servomotor acting on the door jamb side during the closing process and a sensor-controlled three-position control valve which freely vents the closing pressure side of the servomotor above a given response value of the closing force sensor.