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US 4,867,638 AGranted
Split ring seal of a centrifugal pump
AssigneeAlbert Handtmann Elteka GmbH & Co. KG
InventorsAlbert A. Handtmann, Gunter Haupt, Erwin Gebhard, Franz Fischer, Valentin Schroder
Life of this patent
Estimating the term…
Abstract
A split ring seal of a centrifugal pump comprises two rings that consist of a sintered material and that are respectively connected in a frictional or positive manner to a front cover disk of the impeller and to the pump housing which are made of a cast polyamide as produced by the activated anionic polymerization of monomeric laurinlactam.
Claims4
A split ring seal of a centrifugal pump which is formed by an inner ring disposed on the front cover disk of the impeller and by an outer ring disposed on the pump housing,
- characterized in that said two rings consist of a sintered material and that at least said cover disk and at least the portion of said pump housing which is adjacent to said outer ring consist of a cast polyamide which is made by the activated anionic polymerization of monomeric laurinlactam and to which the two rings are respectively connected in a frictional or positive manner.
Dependencies are inferred from the claim text.