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:
Aug. 29, 1989
Filed:
Oct. 16, 1987
Wilhelm Hegenscheidt Gesellschaft mbH, Erkelenz, DE;
Abstract
A broaching tool is provided with at least nine cutting tool edges arranged at its circumference. The cutting tool edges cover only a certain sector along the circumference of a tool disk while leaving another sector between a first and last cutting tool edge free of cutting tool edges. This feature enables moving a tool axially relative to a work piece without first moving the tool radially relative to the work piece. Further, the tool can be moved radially without damage. These movements are performed when the sector without cutting tool edges faces the work piece. This sector without cutting tool edges has an opening angle of less than 180.degree. and it provides a spacing and free space relative to a work piece. Thus, work piece surfaces that have been machined by the cutting edges, are free of these cutting edges if and when the other sector faces the work piece.