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:
Nov. 06, 2012
Filed:
Nov. 28, 2008
Keitaro Yonezawa, Kobe, JP;
Toshinao Nishimoto, Kobe, JP;
Hironori Yamada, Kobe, JP;
Kosmek Ltd., Hyogo, JP;
Abstract
A clamp rod () inserted into a guide hole () of a housing () has: a clamping member (); an inner piston (); and a tapered pressure receiving surface (), which are provided in this order in an axial direction from a left end to a right end. An output portion () for locking and releasing is provided on an inner periphery of a right end portion of one outer piston () inserted between the inner piston () and the guide hole (). A collet () inserted between the pressure receiving surface () and the guide hole () is formed of four divided members () arranged circumferentially at substantially regular intervals. An input portion () driven by the output portion () and a pressing surface () which makes a wedge-engagement with the pressure receiving surface () from a right side are respectively provided in an outer periphery portion and on an inner periphery portion of each divided member (). A lock chamber () and a release chamber (), where pressurized fluid is supplied and discharged, are provided on respective outer sides of both ends of the outer piston ().