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. 29, 1980
Filed:
Sep. 01, 1977
Applicant:
Inventors:
William A Perkins, Nashville, TN (US);
William J Tanner, Nashville, TN (US);
Assignee:
Aladdin Industries, Incorporated, Nashville, TN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47J / ; B65D / ; B65D / ;
U.S. Cl.
CPC ...
220420 ; 215 / ; 220 71 ; 220430 ; 220458 ;
Abstract
A vacuum bottle construction as disclosed in which the vacuum filter is formed from a pair of concentric thin wall metal cylinders. The cylinders are formed of a thin metallic material, such as mild steel, which in and of itself is so thin as to be unable to withstand the pressure differential of atmospheric pressure on one side and a substantial vacuum on the other side. To prevent collapse of the outer thin wall cylinder due to this pressure differential means are provided in the space between the cylinders bearing against the outer wall to provide a force opposing that of the pressure differential.