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:
Nov. 22, 1983
Filed:
Jan. 11, 1982
Russell A Nippert, Delaware, OH (US);
The Nippert Company, Delaware, OH (US);
Abstract
A method and apparatus for forming an electrical connector having a first hollow cylindrical portion of a first outside diameter and a second hollow cylindrical portion of a second outside diameter which is less than the first outside diameter, are provided in which two successive extrusion operations are performed. In the first extrusion operation, a billet of ductile metal is placed in a first die and an intermediate billet is formed by back extruding the first portion of the connector over a punch while forward extruding a part of the billet in the die to form a portion of reduced diameter approximately equal to the second outside diameter of the electrical connector. In the second extrusion operation, the intermediate billet is placed in a movable die section and the intermediate billet and the movable die section are moved downward from an initial position by means of a finish punch. The finish punch contacts the intermediate billet and is received within a first cylindrical recess defined by the billet. Downward movement of the movable die section forces the portion of reduced diameter of the intermediate billet over a stationary punch, thus forward extruding the second cylindrical portion of the connector. The finish punch is then retracted from the connector, and the connector is ejected from the movable die section by raising the stationary punch with respect to the movable die section.