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. 23, 1991
Filed:
Jun. 14, 1990
Robert P Phillips, Loves Park, IL (US);
Pfauter-MAAG Cutting Tools Limited Partnership, Loves Park, IL (US);
Abstract
A hob for cutting gear teeth includes a plurality of generally axially extending and generally circumferentially spaced rows of teeth. The hob is adapted to be thrown away instead of being re-sharpened when the cutting edges of the teeth become worn. Consistent with this, the teeth--rather than being formed with a conventional re-sharpenable profile--are ground so that the tip, the side flanks and the root of each tooth are of a circumferentially concave shape. The grinding is effected by a unique positional mode in which the hob blank is held stationary and in which the grinding wheel is located relative to the blank in such a manner as to enable the use of a wheel of the largest possible diameter for the design criteria of the particular hob being formed.