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. 04, 2012
Filed:
Jul. 14, 2008
Junya Onose, Tochigi-ken, JP;
Hiroyuki Fukushima, Tokyo, JP;
Masahiro Hakozaki, Kodaira, JP;
Shigemitsu Nomura, Saitama, JP;
Takayuki Konno, Utsunomiya, JP;
Junya Onose, Tochigi-ken, JP;
Hiroyuki Fukushima, Tokyo, JP;
Masahiro Hakozaki, Kodaira, JP;
Shigemitsu Nomura, Saitama, JP;
Takayuki Konno, Utsunomiya, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A drill includes a blade portion provided with spiral cutting blades along a cutting direction from a tip end to a rear end, and a shank portion formed consecutively on a rear side of the blade portion. The blade portion includes distal-side cutting blades provided from the distal end of the blade portion along the cutting direction and angled at a constant first torsion angle, intermediate grooves formed at a variable torsion angle that varies gradually from the first torsion angle to a second torsion angle, and rear-side grooves formed at the constant second torsion angle. The rear-side grooves are longer than the distal-side cutting blades in the cutting direction, and the second torsion angle is greater than the first torsion angle.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile