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:
Feb. 05, 2008
Filed:
Jun. 09, 2003
Jorma Haag, Karkkilä, FI;
Keijo Laaksonen, Hyvinkää, FI;
Jorma Haag, Karkkilä, FI;
Keijo Laaksonen, Hyvinkää, FI;
Metso Paper, Inc., Helsinki, FI;
Abstract
A relief cylinder structure for guiding a roll in a multinip calender has a frame and an arm that is arranged to move linearly in relation to the frame. A quick-opening cylinder is placed inside the arm. In a fault situation, the relief cylinder causes the cylinder rolls to move rapidly further away from each other. An auxiliary coupling () opens in a fault situation, wherein the pressure produced in the quick-opening cylinder () is discharged to a hydraulic system in a substantially non-pressurized state. The pressure of the quick-opening cylinder () is thus reduced below the pressure of the main cylinder (), wherein the auxiliary piston () moves towards the end of the arm (). Because the volume of the main cylinder () grows in accordance with the cylindrical space formed inside the arm (), the volume restricted by the frame () of the relief cylinder () is reduced.