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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 5984773 B1

PDFFull Text
Date of Patent:
Nov. 16, 1999

Filed:

Jul. 22, 1997

Method and apparatus for regulating the internal pressure of a

Applicant:
Inventors:

Yves Gervais, Poitiers, FR;

Gilles Mariaux, Beynac, FR;

Gerard Mineaud, Perigny, FR;

Alain Guinot, St Rogatien, FR;

Pierre Andre, Salles Sur Mer, FR;

Assignee:

GEC Alsthom Transport SA, Paris, FR;

Attorney:

Sughrue, Mion, Zinn, Macpeak & Seas, PLLC

Primary Examiner:

Harold Joyce

Int. Cl.
CPC ...
F24F / ;
U.S. Cl.
CPC ...
454 70 ; 454105 ;
Abstract

A regulating apparatus and a regulating method for regulating the internal pressure P.sub.i of a ventilated, closed volume subjected to variations in external pressure P.sub.e, the apparatus including at least two compensation circuits enabling the intake air flow rate q.sub.1 and the extraction air flow rate q.sub.2 to be adjusted in real time so that the difference between these two flow rates algebraically compensates for the leakage flow rate q.sub.f, and maintains the internal pressure P.sub.i inside the volume at a constant level.

Find Patent Forward Citations

Gervais, Yves. (1999). Method and apparatus for regulating the internal pressure of a (U.S. Patent No. 5984773). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5984773

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