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:
Aug. 10, 1982
Filed:
Dec. 26, 1979
William F Hannan, III, Pittsburgh, PA (US);
Charles C Czuszak, Greensburg, PA (US);
Elliott Turbomachinery Co., Inc., Jeannette, PA (US);
Abstract
A turbomachine seal system includes first and second seal members spaced axially about the shaft to define therebetween a first annular chamber. One of the seal members limits the flow of oil from a first portion of the turbomachine towards a second portion thereof. The second seal member limits the flow of process gas from the second portion of the turbomachine towards the first portion thereof. Pressure reducing means is connected to the chamber for reducing the pressure therein below the pressure in the first and second portions of the turbomachine for preventing oil from flowing from the first portion from migrating into the second portion.