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:
Mar. 23, 1982
Filed:
Apr. 14, 1980
Michael H Collins, Huxley, near Chester, GB;
Shell Internationale Research Maatchappij, The Hague, NL;
Abstract
A problem with tanks for storing liquefied gases is the development of cracks in the heat-insulating lining of the tank. Methods have been proposed for the detection of cracks occurring in the lining comprising passing a purging gas, for example nitrogen, through a channelled layer in the heat-insulating lining to a gas-analyzer. Contamination of the purging gas by the contents of the tank, which can be detected by the gas-analyzer, indicates the presence of a crack in the heat-insulating lining. The invention is directed to an improved design of the channelled layer, so that a uniform distribution of the purging gas along an area to be watched for the development of cracks is obtained.