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. 09, 2008
Filed:
Feb. 04, 2005
Yoshihiro Takikawa, Shinshiro, JP;
Yoshihiro Takikawa, Shinshiro, JP;
OSG Corporation, Aichi, JP;
Abstract
A drill which includes a cylindrical main body and a shank contiguous to each other, and which is to be rotated about an axis of the cylindrical main body in a predetermined rotating direction, for enlarging a hole previously formed in a workpiece through a die-casting process. The cylindrical main body has flutes which are formed in the cylindrical mainbody and extend from an axially distal end portion of the cylindrical main body toward the shank, so as to provide cutting edges in the axially distal end portion of the cylindrical main body. The cutting edges cooperate with each other to define a point angle which is larger than 170° and is smaller than 180°. Each of the cutting edges is substantially straight or is curved to be convexed as seen in the direction perpendicular to the axis.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile