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:
Mar. 09, 1982
Filed:
May. 27, 1980
William E Sindelar, Darien, IL (US);
Danly Machine Corporation, Chicago, IL (US);
Abstract
A power metal-forming press of the underdrive type having a pair of laterally spaced rocker shafts journaled in the base. A set of vertical pull rods are connected to arms at the ends of the shafts for reciprocating the press slide. Driving subassemblies are provided at the near side and far side of the press each including a main drive gear carrying an eccentric. A pitman pivotally engaging the eccentric has a short arm which is coupled via a connecting link to a rocker arm on one of the shafts. The pitman also has a long arm extending generally in the opposite direction, the end of the long arm being guided with respect to the frame along a generally longitudinal path. The long arm is so angled with respect to the connecting link under conditions of bottoming of the slide that upon rotation of the main drive gear the short arm traces a generally elliptical path having a major axis which bears an acute angle to the bottoming orientation of the connecting link. As a result the slide moves relatively slower as it approaches its bottoming position and relatively faster as it leaves its bottoming position.