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, 1991
Filed:
Dec. 13, 1989
David J Janocko, Forest Hills, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A pump has a stationary seal housing with pressurized liquid and gas therein, a rotatable shaft disposed through the housing and operable for centrifugally producing rotation of the liquid within the housing, and a seal assembly disposed between the housing and rotatable shaft. The pump employs a device for venting from the housing to the exterior thereof the gas released from the liquid in the housing, such as by a drop in the pressure thereof, while blocking escape of the liquid therefrom. The venting device includes a body in the form of an externally threaded plug threadably mounted into an internally threaded bore in the seal housing, a flow facilitating passageway defined through the plug, extending between, and having respective entry and exit openings at, the respective inner and outer sides of the plug for providing communication between the interior and exterior of the seal housing, and a micro-porous membrane mounted to the plug across the entry opening of the passage for permitting gas flow while blocking liquid flow therethrough.