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:
Nov. 13, 2001
Filed:
Nov. 23, 1999
Bertrand Seigeot, Dingy Saint Clair, FR;
Alcatel, Paris, FR;
Abstract
According to the invention, the presence of leaks is tested by placing the heat exchanger under test in a leakproof test chamber, by connecting the heat exchanger to a pressurization device that establishes an appropriate air pressure inside the internal cavity of the heat exchanger, by establishing a vacuum around the heat exchanger in the leakproof test chamber by means of a pump system, and by detecting the presence of helium around the heat exchanger in the leakproof test chamber by means of a helium leak detector. Testing is performed by using the helium which is naturally present in the air. This improves the availability of the machine and the reliability of the leak test, while also eliminating constraints and costs associated with using a tracer gas.