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:
Apr. 18, 2000
Filed:
Jun. 23, 1997
Applicant:
Inventor:
Gary G Full, Tucson, AZ (US);
Assignee:
Otis Elevator Company, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66B / ; E05F / ;
U.S. Cl.
CPC ...
250221 ; 250216 ; 49 25 ; 49 26 ; 187317 ; 187392 ;
Abstract
A safety system for detecting an obstruction approaching closing doors includes a transmitter stack and a detector stack. Each transmitter stack includes a plurality of transmitter three-dimensional lenses. Each detector stack includes a plurality of detector three-dimensional lenses. The three-dimensional lenses are offset from the corresponding optical devices to angle an outgoing or incoming signal. The present invention results in more compact packaging for the safety system and in reduced cost of the assembly therefor.