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. 02, 1985
Filed:
Mar. 19, 1984
Applicant:
Inventor:
Flavien Lazarre, Pau, FR;
Assignee:
Societe Nationale Elf Aquitaine, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 27 ; 92202 ; 92205 ;
Abstract
Packing or sealing moving in a hollow cylinder. Such a device, or moving piston with self-tightening ring, comprises two elements of cylindrical external outline such as a cylindrical rod integral with the first element slides in a cylindrical chamber delimited inside a second element and facing the first element, the two elements being separated by an annular ring that ensures the packing or sealing with the internal wall of the cylinder. Such a piston allows to suppress use of mercury as pressure transmission agent.