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. 11, 2004
Filed:
Oct. 05, 1999
Lars-Otto Sislegård, Sundsvall, SE;
Fredrik Almberg, Sundsvall, SE;
Valmet Fibertech Aktiebolag, , SE;
Abstract
Hydraulic systems are disclosed for operating a press comprising a press ram, a press cylinder including a primary side for activating the press ram and press ram return cylinders for returning the press ram, and at least one flow amplifier comprising a piston including a primary side and a secondary side, the primary side of the piston including a large piston area and a secondary side of the piston having a small piston area, the primary side of the piston being connected to the primary side of the press cylinder and the secondary side of the piston being connected to the press ram return cylinder, at least a portion of the hydraulic system comprising the connection between the primary side of the piston and the primary side of the press cylinder is pressurized.