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:
Jan. 25, 2000
Filed:
Sep. 30, 1998
Erik Brox, Forshaga, SE;
Valmet-Karlstad AB, Karlstad, SE;
Abstract
A shoe press for a paper or board machine comprises a press shoe and a counter roll forming an extended nip for a paper or cardboard web and for a circulated flexible belt. At least one hydraulic loading cylinder is arranged between a horizontal supporting beam included in the frame system of the shoe press and the counter roll for pressing the press shoe against the counter roll, the piston of the loading cylinder being fixed to the supporting beam. A hydrostatic compartment is arranged between the surface of the press shoe facing the loading cylinder and the opposing surface of the loading cylinder and adapted to be supplied with hydraulic fluid from a hydraulic fluid source, the hydraulic fluid chamber communicating with the working chamber of the loading cylinder. A duct formed in the press shoe, or in a pipe attached to the press shoe, opens into the hydrostatic compartment and is connectible to the hydraulic fluid source. A cylinder of the loading cylinder includes a tubular sleeve which extends into the working chamber toward the piston, a free end of the sleeve having a passage connecting the working chamber to the hydrostatic compartment. A throttling member fixed relative to the piston extends through the passage and is configured to close the passage when the cylinder moves a predetermined stroke distance away from the piston.