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:
Jul. 30, 1991
Filed:
Jun. 19, 1990
Applicant:
Inventors:
Assignee:
Nitto Kohki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408132 ; 408135 ; 408 76 ; 408 56 ; 74625 ; 74640 ; 192 96 ; 192 71 ;
Abstract
A boring apparatus wherein the size in the axial direction of the shaft of the manual handle horizontally supported can be made small-sized. A clutch is composed of spherical bodies, a cylindrical body having formed therein hole portions for receiving the spherical bodies, spherical body pressing means for pressing the spherical bodies to the outside or inside of the cylindrical body, and an engagement member having recessed portions engaging with the spherical bodies which are projected to the outside or inside of the cylindrical body, and the boring apparatus is constructed by using the clutch.