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. 03, 2015
Filed:
Dec. 16, 2011
Ketan Patel, Annecy le Vieux, FR;
Frederic Rouveyre, Chavanod, FR;
Ketan Patel, Annecy le Vieux, FR;
Frederic Rouveyre, Chavanod, FR;
ADIXEN VACUUM PRODUCTS, Annecy, FR;
Abstract
The leak detection device using hydrogen as a tracer gas is intended to be connected to an object to be tested. The leak detection device includes a hydrogen sensor placed in a low-pressure enclosure and includes a diode, a resistor, a MOS-type transistor whose gate is covered with a palladium catalyst, a pump connected to the low-pressure enclosure, a pressure gauge configured to measure the pressure in a vacuum line formed by the low-pressure enclosure connected to the pump, and a multiway valve having a first port allowing admission of the gas flow containing the tracer gas into the vacuum line, and a second port allowing the admission of neutral gas. The method makes it possible to stabilize the pressure of the vacuum line in order to avoid fluctuations in the hydrogen measurements.