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:
Dec. 03, 2002
Filed:
Apr. 11, 2001
Peter Danielsson, Fagervik, SE;
Kjell Forslund, Sundsbruk, SE;
Valmet Fibertech AB, , SE;
Abstract
Centrifugal pumps are disclosed for pumping a pulp suspension including a housing, a rotary shaft mounted within the housing, an impeller including a hub and blades, a wheel disk mounting the blades and including openings for discharging gas generated in the pump, vacuum blades mounted on the hub behind the wheel disk, a vacuum housing enclosing the vacuum blades, the vacuum housing including an outer cylindrical wall which is radially displaced and eccentrically disposed with respect to the vacuum blades, the vacuum housing including a front wall and a rear wall separated from the vacuum blades by a gap, the rear wall being axially adjustable so that the gap between the vacuum blades and the rear wall can be adjusted to adjust the vacuum generated thereby, and a passageway for communication between the openings in the wheel disk and the suction opening.