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:
Nov. 02, 2021
Filed:
Dec. 22, 2017
Grundfos Holding A/s, Bjerringbro, DK;
Helge Grann, Bjerringbro, DK;
John Frigård Nielsen, Fårup, DK;
Erik Bundesen Svarre, Bjerringbro, DK;
Per Frost Vedsted, Bjerringbro, DK;
GRUNDFOS HOLDING A/S, Bjerringbro, DK;
Abstract
A cartridge seal is provided for sealing a shaft () with respect to a housing () and is intended to be a slide ring seal arrangement () for a centrifugal pump. The cartridge seal includes a shaft protection sleeve which is rotationally connected to the shaft () by a retaining ring, a support () for incorporating the cartridge seal into a housing opening of the pump housing (), a slide ring which is rotationally connected to the shaft protection sleeve and a counter slide ring which is rotationally connected to the support (), as well as an enclosed space () within the sealing arrangement. The space () is fluidically connected to a sealing gap formed between the slide ring and the counter slide ring, and is at least partially prefilled with liquid in order to prevent dry running when the pump is operated for the first time.