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:
Jul. 04, 2000
Filed:
Sep. 22, 1999
Uwe Muschalik, Duisburg, DE;
Karl Hermann Claasen, Moers, DE;
SMS Eumuco GmbH, Leverkusen, DE;
Abstract
An extruding press has a housing defining an axis, an end frame displaceable axially on the housing, and a plurality of cylinders on the housing. Respective pistons having axially oppositely directed front and rear faces subdivide the cylinders into front and rear compartments and respective piston rods extend from the pistons axially forward through the respective rear compartments out of the respective cylinders and are connected to the end frame. A tool is fixed on the housing so that a workpiece positioned between the tool and the end frame can be extruded through the tool when the front compartments are pressurized to axially rearwardly displace the end frame and press the workpiece rearward against the tool. Respective fluid-powered actuators braced between the housing and the pistons can be pressurized to displace the end frame forward away from the tool. Passages extending between the compartments and controllable valves in the passages permit free fluid flow between the compartments. Respective filler bodies projecting rearward from the rear faces through the respective front compartments out of the respective cylinders each reduce an effective surface area of the respective rear face so that it is generally equal to an effective surface area of the front face of the respective piston. Respective elements engaging the filler bodies permit same to move radially relative to the respective piston.