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:
Mar. 08, 1977
Filed:
Oct. 07, 1975
Jean Martin, Chatillon, FR;
Groupement pour les Activities Atomiques et Advancees 'GAAA', Le Plessis-Robinson, FR;
Abstract
Rotating seal sealing by viscous effect, intalled on a rotating shaft crossing through a bore separating, from the outside medium, an enclosure containing a fluid kept under pressure, comprising at its center two threads having an unequal length and having reverse pitches, separated by a groove and two lip seals for a rotating shaft of the conventional type on either side of the threads. The gap between the two lip seals is fed with viscous fluid by two tanks, one of which is at the pressure of the fluid for which sealing is to be provided. Application to the passing of shafts rotating at a high speed for all types of enclosures containing a gas or a liquid under pressure which can reach several tens of bars.