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. 21, 1994
Filed:
Aug. 26, 1993
Applicant:
Inventors:
James O Holtey, Rockford, IL (US);
Paul A Charles, Larne, GB;
Kugalur S Chandrasekaran, Rockford, IL (US);
Assignee:
The Ingersoll Milling Machine Company, Rockford, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23Q / ; B23B / ; B23C / ;
U.S. Cl.
CPC ...
483 12 ; 4082 / ; 409230 ; 409231 ;
Abstract
High speed cutting with machine tools is achieved with readily available bearings of a small diameter by mounting and presetting the cutting tool directly in a spindle of a spindle unit without employing a tool holder. Preferably, the spindle unit is small like a tool holder and can be easily changed with conventional kinds of tool changing apparatus. The elimination of the tool holder allows the conventional bearings to be kept small so that they may be operated at high speeds, e.g., 20,000 to 40,000 rpm, without excessive heat that would damage the bearings.