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:
Jan. 08, 1991
Filed:
Nov. 24, 1989
Larry E Efferding, Pensacola, FL (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A closure system of a spent fuel storage cask includes a lid assembly having a shield lid which is installed under water and which cooperates in the drainage of water from the cask. A primary cover having a spring energized metalic C-ring captured therein to provide a primary gas seal is then installed over the shield lid. Closable gas passages extending through the primary cover permit the primary gas seal to be tested by injecting pressurized gas on one side of the primary gas seal and testing for leakage on the other. A seal cover is installed over the primary cover and welded at its periphery to provide the secondary gas seal. The seal cover has a closable gas passage which allows pressurized gas to be injected between the primary cover and the sealed cover so that leaks at the secondary gas seal can be detected. The closure system may also include a gas pressure monitoring system which communicates with the interior of the cask and which can be recalibrated during long-term storage of spent fuel.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile