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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.:

US 7632453 B1

PDFFull Text
Expired
Date of Patent:
Dec. 15, 2009

Filed:

Aug. 10, 2004

Gas quenching method using a recycling facility

Applicants:

Florent Chaffotte, Chatillon, FR;

Nicolas Blanchard, Voreppe, FR;

Olivier Delobel, Paris, FR;

Linda Lefevre, Versailles, FR;

Inventors:

Florent Chaffotte, Chatillon, FR;

Nicolas Blanchard, Voreppe, FR;

Olivier Delobel, Paris, FR;

Linda Lefevre, Versailles, FR;

Assignee:

L'Air Liquide-Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, Paris, FR;

Attorney:

Elwood Haynes

Primary Examiner:

Melvin C Mayes

Assistant Examiner:

Colette Nguyen

Int. Cl.
CPC ...
C21D 1/62 (2006.01);
U.S. Cl.
CPC ...
Abstract

The invention relates to a gas quenching method of the type that makes use of (i) a quenching cell (V) which is intended to receive objects to be quenched with a quenching gas and (ii) a buffer capacity (V) which is designed to contain the quenching gas. The invention is characterised in that following a quenching operation, all or part of the gas contained in the cell (V) is recycled in the following manner consisting in: obtaining a first intermediate storage balloon (V) which can receive the quenching gas from the cell; after a quenching operation, performing one or more operations comprising the partial emptying of the contents of the cell (V) into the first intermediate storage balloon (V), by means of partial or total pressure balancing between the two volumes of the cell (V) and the first intermediate storage balloon; transferring the gas stored in the first intermediate storage balloon (V) to the buffer capacity (V); and, if necessary, releasing part of the contents of the cell (V) into the atmosphere.

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Chaffotte, Florent. (2009). Gas quenching method using a recycling facility (U.S. Patent No. 7632453). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7632453

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