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. 05, 1994
Filed:
Sep. 30, 1992
Vijay Nagpal, Westland, MI (US);
William J Fuhrman, Bloomfield Hills, MI (US);
David H Dodds, South Lyon, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A extrusion die assembly for cold extruding internally and/or externally toothed gears and the like, particularly internally toothed ring gears, with the mandrel for forming the internal teeth in the workpiece including axially successive sets of die teeth, with each set including a full complement of annularly arranged and equally spaced die teeth, and the die teeth from the leading set to the trailing set increasing progressively in diameter. In one embodiment, the die teeth from one set to the next on the mandrel extrude the gear teeth in equal radial depth, and in a second embodiment, the die teeth of each succeeding mandrel set extrude the gear teeth by displacing an equal volume of material from one set to the next. The die teeth in each set on the mandrel including a relief portion of progressively decreasing radial dimension, the workpiece being arrested on the die assembly such that all extrusion of the workpiece axially along the mandrel is in the direction of the relief portion, thereby maintaining at a minimum frictional contact between the mandrel and the workpiece.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile