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:
May. 30, 1989
Filed:
Apr. 16, 1987
Applicant:
Inventor:
Ikuo Kyotani, Kitamoto, JP;
Assignee:
G-C Dental Industrial Corp., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61C / ;
U.S. Cl.
CPC ...
433166 ; 5120 / ;
Abstract
A cutting tool include a shank having a head, a groove which is formed on the outer face portion of the head only in the dextrally spiral form, and hard abrasive grains-attached section formed on the outer face portion of the head except for the groove. The total sum of the width of the groove in the section normal to the axis of the head of the shank is in a range of (1/50 to 2/5).times..pi.D, except for the endmost terminating portion of the head, wherein D is the diameter of the section normal to the axis of the head.