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:
Jan. 01, 2002
Filed:
Jul. 16, 1999
Jean-Claude Laborde, Les Ulis, FR;
Victor Manuel Mocho, Montreuil, FR;
Other;
Abstract
An air curtain ( ) is used to dynamically separate a zone ( ) to be protected and a contaminating zone ( ) communicating with each other through at least one separation zone ( ), the air curtain being formed by simultaneously injecting at least two adjacent clean air jets into the same direction in the separation zone ( ). More precisely, the air curtain ( ) comprises a slow jet, in which the tongue ( ) covers the entire separation zone ( ) and a fast jet inserted between the slow jet and the zone ( ) to be protected and for which the injection flow is such that it induces an air flow equal to approximately half the injection flow of the slow jet, on its surface in contact with the slow jet. Preferably, clean ventilation air is also injected into the zone ( ) to be protected at a flow equal to at least the air flow induced by the surface of the air curtain in contact with the ventilation air, and in any case at a speed not less than 0.1 m/s.