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. 14, 2004
Filed:
May. 23, 2003
Shigeki Muramatsu, Shizuoka, JP;
Tooru Uchida, Shizuoka, JP;
Kouichi Furutou, Tokyo, JP;
Kaname Nagatani, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a wire-driving system that drives and moves a movable unit along a guide path, a drive drum member is rotatably provided on the movable unit to be rotated around an axis which is perpendicular to a movement direction of the movable unit. An electric drive motor is provided in the movable unit and operationally connected to the drum member to be rotationally driven in either a first rotational direction or a second rotational direction. A wire cable has a first end and a second end, and is partially wound around the drum member such that a first cable section and a second cable section are extended from the drum member. The respective first and second ends of the wire cable are securely attached to two fixed points beside terminal ends of the guide path such that the first and second cable sections of the wire cable are tensionally extended along the guide path. The respective first and second cable sections of the wire cable are wound around and unwound from the drum member during the rotation of the drum member in the first rotational direction by the drive source, and the respective first and second cable sections of the wire cable are unwound from and wound around the drum member during the rotation of the drum member in the second rotational direction by the drive source, resulting in the movement of the movable unit along the guide path.