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:
Mar. 22, 2022
Filed:
Dec. 15, 2017
Grundfos Holding A/s, Bjerringbro, DK;
Brian Lundsted Poulsen, Langå, DK;
Lasse Søgaard Ledet, Aalborg, DK;
Grundfos Holding A/S, Bjerringbro, DK;
Abstract
A centrifugal pump includes at least one pump stage, with a rotatable impeller () with a suction port () which is sealed with respect to a stationary pump part () by way of a sealing arrangement. The sealing arrangement includes a sealing ring () between the impeller () and the stationary pump part (). The sealing arrangement is configured such that at least on delivery operation of the pump, the sealing arrangement has sealing sections which are distanced to the counter sealing surface and sealing sections which bear on the counter sealing surface, in an alternatingly successive manner considered in the peripheral direction of the sealing ring ().