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:
Feb. 05, 2013
Filed:
Mar. 10, 2010
Aage Bruhn, Bjerringbro, DK;
Lars Ostergaard, Randers, DK;
Aage Bruhn, Bjerringbro, DK;
Lars Ostergaard, Randers, DK;
Grundfos Management a/s, Bjerringbro, DK;
Abstract
An axial face seal (), which seals a pump housing in the region of the pump shaft (), is constructed in an axially compact manner. Spring holders (), which transmit the required pressing force of a compression spring (), are connected to one another with a positive fit in a rotation direction, and hold a rotating axial face seal ring () in a rotationally fixed manner to the pump shaft (). The spring holders () are compact and enclose an abutment ring () for pump impellers as well as the compression spring (). A motor-side spring () engages over the rotating axial face seal ring (), by which an axially extremely short constructional length is achieved.