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:
Jun. 23, 1992
Filed:
Oct. 01, 1991
Haruki Mizoguchi, Ikoma, JP;
Mizoguchi Iron Works & Co., Ikoma, JP;
Abstract
A method of determining the minimum number of segments of a metal collet for a cutting tool holder having a truncated conical portion having a small-diameter end and a cylindrical portion connected to the small-diameter end. The collet is formed with slits extending axially inwards from the opening thereof for inserting a cutting tool and arranged at equal angular intervals. The slits extend to the cylindrical portion. The minimum number of segments is determined to be within the range where the geometrical moment of inertia of the section with respect to a line which passes through the centroid of the section and is perpendicular to a radical direction of the collet, as plotted against the number of segments, becomes substantially constant. With this arrangement, each segment has a suitable deflectability so that the collet can grip a cutting tool with sufficient force and accuracy and over a wide chucking range.