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:
Apr. 22, 2003
Filed:
Sep. 07, 2000
Applicant:
Inventors:
Robin L. Berg, Sr., Hudson, WI (US);
John Burwell, Eagan, MN (US);
Richard J. Kelber, St. Louis Park, MN (US);
Assignee:
Xerxes Corporation, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65G 5/00 ; G01M 3/04 ;
U.S. Cl.
CPC ...
B65G 5/00 ; G01M 3/04 ;
Abstract
A double walled storage tank includes an outer wall, an inner wall, a plurality of ribs disposed between the inner and outer walls, and a plurality of annular spaces between the ribs. The annular space between each pair of ribs is connected to other annular spaces only at the top of the tank. When a leak occurs in either the outer or inner wall, the annular space corresponding to the leak will at least partially drain while the other annular spaces will remain full. Thus, the leak location can be determined by simply examining the annular spaces between pairs of ribs.