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:
Feb. 12, 2002
Filed:
Sep. 19, 2000
SMC Corporation, Tokyo, JP;
Abstract
A spring or springs are provided between driving-side members that operate together with an output shaft of a stepping motor, and driven-side members that operate together with a jaw member. Thereby, when the jaw members performs opening motion, the driving-side members and the driven-side member directly engage with each other, thereby allowing a driving force to be transmitted directly from the output shaft to the jaw members. When the jaw members performs workpiece-holding operation, the driving-side members and the driven-side member engage each other via the spring or springs, thereby allowing the driving force to be elastically transmitted from the output shaft to the jaw members via the spring or the springs. In this configuration, when the workpiece-holding operation is performed by the jaw members, the stepping motor is controlled so as to over-rotate in a buffered manner.