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. 12, 2012
Filed:
Jan. 18, 2007
Patrik Andersson, Skogas, SE;
Patrik Andersson, Skogas, SE;
Xylem IP Holdings LLC, White Plains, NY (US);
Abstract
The invention relates to a pump for pumping contaminated liquid including solid matter, comprising an impeller (), which is rotatable in a pump chamber of said pump, the impeller () being movable in the axial direction in relation to a seal housing cover () between a first position adjacent to an impeller seat () and a second position spaced apart from said impeller seat (), said pump also comprising a cavity () defined by the seal housing cover () and the impeller (), and at least one opening gap () connecting said cavity and said pump chamber. Furthermore, said opening gap () has a first flow area when the impeller () is in the first position, and a second flow area bigger than said first flow area when the impeller () is' spaced apart from said first position.