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. 08, 1992
Filed:
Aug. 06, 1991
Marc Durrieu, Sainte Adresse, FR;
Total Raffinage Distribution S.A, Levallois Perret Cedex, FR;
Abstract
The invention relates to an apparatus which comprises a plurality of tubes made of a first material, which tubes are mounted inside a cylindrical body or shell made of a second material, which second material undergoes differential thermal expansion in relation to the first material of the tubes. The tubes are rigidly secured by their ends to two end members, at least one of which is a floating member due to the fact that it is connected to the shell by means of a flexible ring gasket. The flexible ring-type gasket has inner and outer edges which are clamped to the floating member and to the shell, respectively. The inventive apparatus is useful, for example, in the ultra filtration separation of fine catalyst particles which are in suspension in a hydrocarbon feedstock which feedstock comes from a catalytic cracking unit.