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. 19, 2009
Filed:
Jun. 24, 2005
Jiro Mitsui, Yamanashi-ken, JP;
Yousuke Matsuda, Yamanashi-ken, JP;
Hiroshi Satoh, Yamanashi-ken, JP;
Jiro Mitsui, Yamanashi-ken, JP;
Yousuke Matsuda, Yamanashi-ken, JP;
Hiroshi Satoh, Yamanashi-ken, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
A roller arm unit of the present invention has three or more pulleys by odd pieces. A door-opening cable and a door-closing cable extending from a power unit have tip ends fixed to a first and second end portions of a guide rail by way of the pulleys. The door-opening cable and the door-closing cable are intersected with each other between two neighboring pulleys. A path length of a take-up side cable becomes short and a path length of a pay-out side cable becomes long when the roller arm unit is caused to be swung due to influence of the curved portion.