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:
Sep. 10, 1991
Filed:
Mar. 22, 1990
Raymond D Wolf, Chaska, MN (US);
Fluoroware, Inc., Chaska, MN (US);
Abstract
An improved chemical pressure vessel for storage, shipping and pressurized dispensing of fluid chemicals is formed with a seamless fluoropolymer inner liner permanently encapsulated within a metallic overpack. To protect the liner from the heat of welding during encapsulation of the overpack around the liner, the liner is formed with recessed indentation immediately adjacent the weld area. The indentation retains a sacrificial layer of fluoropolymer to ensure that the heat of welding will not affect the liner itself. In addition, the overpack is formed with a protective flange or 'puddle plate' in the area of the weld to ensure that there is adequate isolation of the weld puddle from the fluoropolymer liner. The fact that the liner is seamless and permanently encapsulated within the overpack eliminates the need for periodic disassembly of the vessel for inspection of seams for possible leakage.