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:
Sep. 11, 2001
Filed:
Oct. 19, 2000
Hatebur Umformmaschinen AG, Reinach, CH;
Abstract
A hot-forming machine for the hot-pressing of workpieces comprises a die (,), an associated extendable and retractable ejector (,) and a forwardly and backwardly movable press ram (,). The ejector (,) is connected to a control piston (,) arranged displaceably in a pressure chamber (,). Liquid can flow out of the pressure chamber (,) via a liquid outlet bore (,) and a liquid discharge line (,). By means of a throttle (,) arranged in the liquid discharge line (,) the outflow of liquid and therefore the repulsion of the extended ejector (,) by the forwardly moving press ram (,) are delayed in such a way that a workpiece (,) arranged between ejector (,) and press ram (,) is pre-upset and descaled outside the die (,).