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:
Jun. 07, 1988
Filed:
Apr. 07, 1986
Larry J Schlicht, Doran, MN (US);
Lear Siegler, Inc., Sioux Falls, SD (US);
Abstract
A spike harrow tooth is fabricated by cold forming a metal blank which is provided from appropriate bar stock, the blank having a length for a single harrow tooth. The blank is placed in a first press, oriented with opposite edges of the square configuration aligned in the direction of press closing and opening. The first press is equipped with dies for displacing the metal at one end of the blank, by flattening the opposite edges to thereby displace the metal crosswise and form an enlarged head. Simultaneously, metal is displaced by dies in the first press from opposite side edges of the blank at the other end of the blank for partially forming a point with outwardly bulging excess portions. The partially formed blank then is placed in a second press equipped with dies for removing the outwardly bulging excess portions into waste chips.