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:
May. 02, 1989
Filed:
Feb. 15, 1983
WABCO Fahrzeugbremsen GmbH, Hanover, DE;
Abstract
An electropneumatic door control, particularly for the control of doors in public transportation, which includes for the purpose of detecting the respective position of the door linear motion sensors (1, 2) which are mounted on the pneumatic door cylinders (4, 5) or on the axes of rotation of the door wings, and whose output signals are evaluated by electronics (3). The electronics (3) include a computer which automatically detects the end positions as well as the motion behavior of the door or obstructions, respectively, and triggers a monitoring function, if necessary. The proposed door control increases reliability and eliminates previously used limit switches and electropneumatic differential pressure switches.