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. 25, 1990
Filed:
Jul. 26, 1989
Applicant:
Inventors:
Robert D Milnes, Pittsburgh, PA (US);
Gioacchino A Mutone, Pittsburgh, PA (US);
Assignee:
AEG Westinghouse Transportation Systems, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
318265 ; 318286 ;
Abstract
A microprocessor controlled automatic door opener including means for detecting the velocity and direction of travel of the door. The microcontroller evaluates detected changes in either the velocity or direction of travel to determine the cause, and either reverses door travel direction or ignores the detection.