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:
May. 26, 2015
Filed:
Apr. 29, 2011
Michael Micklisch, Göppingen, DE;
Markus Müller, Gebesee, DE;
Michael Micklisch, Göppingen, DE;
Markus Müller, Gebesee, DE;
Schuler Pressen GmbH & Co. KG, Göppingen, DE;
Abstract
The invention resides in a hydraulic cylinder () for a hydraulic drawing cushion () of a drawing press (). The hydraulic cylinder () includes a first operating chamber (), a second operating chamber (), and a third operating chamber (). An annular piston () with a first piston surface area () and a second piston surface area () separates the first operating chamber () from the second operating chamber (). The first and the second piston surfaces () have the same size. A front surface of the piston rod () forms a third piston surface () which is larger than the first and second piston surfaces. The third piston surface () delimits the third operating chamber () of the hydraulic cylinder (). The first and the second operating chambers () are provided for controlling the position and/or the movement of the piston rod (). The third operating chamber () serves to control the metal sheet clamping force of the drawing press via the piston rod ().