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:
Jul. 28, 1987
Filed:
Mar. 25, 1986
Applicant:
Inventors:
Katsuya Teranishi, Katsuta, JP;
Kazuhira Ozima, Kasama, JP;
Cyuichi Saito, Katsuta, JP;
Hiroyasu Ogawa, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
198333 ; 198324 ;
Abstract
In an escalator, at least one of a plurality of staircase steps connected in an endless manner and supported by a body frame is made for a wheel chair loading staircase step. The staircase step comprises an upwardly movable main tread board, a sub-tread board supported by the main tread board, a lifting mechanism for lifting the main tread board, an electric drive unit for driving the lifting mechanism and a widening mechanism for automatically widening the sub-tread board by means of the electric drive unit.