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. 27, 2005
Filed:
Sep. 06, 2000
Yoshio Tsukahara, Chiba, JP;
Kazuhiko Motomura, Chiba, JP;
Takashi Tanaka, Chiba, JP;
Koichi Maeda, Tokyo, JP;
Yoshio Tsukahara, Chiba, JP;
Kazuhiko Motomura, Chiba, JP;
Takashi Tanaka, Chiba, JP;
Koichi Maeda, Tokyo, JP;
Otis Elevator Company, Farmington, CT (US);
Abstract
An escalator step riser is improved by adding grooves to the cleat surfaces, and, at the same time, a skid-inhibiting function is realized at the rear edge of the step. For escalator step (), cleats () are formed with a pitch twice that of tread () on riser (). On each cleat () of the riser (), one or more grooves () are formed in the longitudinal direction. In addition, skid-inhibiting surface (), made of synthetic resin and having a prescribed width, is attached in a quick connecting/disconnecting manner on the rear edge of step (). A serrated irregular portion () is formed on the upper surface of cleats (), () of the non-slip surface ().