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:
Jun. 19, 2012
Filed:
Oct. 08, 2008
Anthony C. Sykora, Hudson, NH (US);
Bruce R. Crossley, Pittsfield, MA (US);
Joseph A. Ducharme, Milford, NH (US);
James P. Burns, Hollis, NH (US);
Anthony C. Sykora, Hudson, NH (US);
Bruce R. Crossley, Pittsfield, MA (US);
Joseph A. Ducharme, Milford, NH (US);
James P. Burns, Hollis, NH (US);
Ovivo Luxembourg S.à r.l., Munsbach, LU;
Abstract
An impeller for use in association with an extraction plate adapted for defibering liquid slurry stock and causing defibered material to pass through the extraction plate. The impeller includes a cylindrical central body portion and a plurality of vanes extending outwardly in a generally tangential direction from the central body portion. The vane leading face height from an extraction side to an air foil surface is substantially constant from the vane outer end to where the vane is attached to the central body portion at the radially outward edge of the central body portion, and then thereafter gradually decreasing in height from the radially outward edge of the body central portion to the airfoil surface at the vane inner end.