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:
Sep. 20, 2016
Filed:
Jun. 29, 2011
Hirokazu Suruga, Nara, JP;
Hidemori Kawashita, Nara, JP;
Hirokazu Suruga, Nara, JP;
Hidemori Kawashita, Nara, JP;
Daishowa Seiki Kabushiki Kaisha, Higashiosaka-shi, Osaka, JP;
Abstract
Provided is a tap holder configured so that compression-side elastic characteristics and tension-side elastic characteristics are different from each other with utilization of an elastic member for absorbing synchronization error in rotation and feeding of a spindle of a machine tool. The tap holder includes a chuckfor holding a tap P, and a holder bodyfor holding the chuckso that the chuckis movable along a rotational axis X and rotatable in synchronism with the chuck. The tap holder further includes elastically deforming membersprovided in a tension direction and a compression direction, respectively and deformable between the chuckand the holder bodywhen a tension force or a compression force is applied to the tap P along the direction of the rotational axis X, and a deformation reducing mechanismfor the elastically deforming memberssuch that a deformation amount along the rotational axis X generated in at least one elastically deforming memberof the elastically deforming membersdisposed respectively in the tension direction and the compression direction is smaller than an amount of displacement of the chuckalong the rotational axis X.