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. 08, 1983
Filed:
Dec. 02, 1981
Gunter Pietsch, Hamburg, DE;
Abstract
A seal assembly for rotating shafts particularly for sterntube seals for ps comprises two slide rings mounted in a receiving ring and pressed against a counter-ring by means of the surrounding sea-water. Between the slide rings an annular space is formed into which a liquid medium is let. The outer slide ring being a hydrostatic seal is lifted by the liquid medium in the annular space against the force of a spring in the receiving ring so that a small amount of the liquid medium leaks out to lubricate the slide rings and to prevent entering of abrasive particles. The inner slide ring is a hydrodynamic seal and is urged into contact with the counter-ring by the hydrostatic head of the sea-water surrounding the seal assembly. The receiving ring is guided in the housing or on the shaft with some clearance so that the faces of the slide rings can maintain a position parallel to the counter-ring.