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:
Dec. 22, 1992
Filed:
Jan. 21, 1992
Scott D Maynard, Newport Beach, CA (US);
Other;
Abstract
An in-die tapping tool having particular application to a progressive die method for threading holes in a sheet metal workpiece. The tapping includes a transmission system comprising a threaded shaft assembly and a planetary roller nut. The roller nut is adapted to move axially along the shaft assembly in response to an impact force applied to the tapping tool during the downstroke of the press. The movement of the roller nut causes the shaft assembly to rotate, which rotation is imparted to a threaded lead screw to cause the lead screw to simultaneously rotate and ride axially along a threaded wall of a hollow cylindrical body. The rotational and axial movements of the lead screw through the cylindrical body are transferred to the tap to correspondingly induce a rotation and advancement of the tap towards the workpiece having the holes to be threaded. However, the axial location of the rotatable shaft assembly relative to the workpiece remains unchanged.