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:
Feb. 10, 1976
Filed:
Jul. 05, 1974
Thomas J Lindem, Rockford, IL (US);
Jan Van Roojen, Rockford, IL (US);
The Ingersoll Milling Machine Company, Rockford, IL (US);
Abstract
A mounting for supporting a cutter tooth in a boring bar for fine adjustment outwardly to compensate for tooth wear, the mounting including a cartridge insertable into a hole through the boring bar to support the tip of the cutter tooth in a cutting position with respect to the bar. The cartridge comprises a slidable holder connected by means of a differential screw to a nut so that, as the screw is turned, the length of the cartridge is increased to provide fine adjustment in the position of the cutter tooth. Coarse adjustment in the position of the cutter tooth is provided as an incident to assembling the parts of the cartridge by threading the screw into the nut until the lower end of the screw is flush with the lower end of the nut and by then mounting the holder on the upper end of the screw. Once assembled as a unit, the cartridge is inserted into the hole until an annular shoulder on the nut seats against a complimentary shoulder within the hole thereby accurately locating the cutter tooth so only fine adjustment is needed thereafter. In order for the mounting to be used in smaller diameter boring bars, one form of the invention utilizes a differential screw having interfitting male and female portions and, in the other form of the invention, a driver recess in the lower end portion of the screw permits the latter to be positioned essentially flush with the underside of the boring bar.