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:
Jun. 27, 2006
Filed:
Jul. 17, 2003
Gerrit Jan Baarda, Emmen, NL;
Gerrit Jan Baarda, Emmen, NL;
Honeywell International, Inc., Morristown, NJ (US);
Abstract
Gas flow control is addressed using a controllable approach that facilitates safe operation. According to an example embodiment, a control arrangement for gas flow comprises two main valves connected in series and two servo valves operated by an actuator, the opening of the main valves being controlled via said servo valves. The main valves are operated by means of diaphragms limiting a first gas chamber, wherein the first servo valve is connected to the first gas chamber of the first main valve, to a second gas chamber in the inlet area of the first main valve and to the first gas chamber of the second main valve. Due to this construction a leakage gas flow out of the first gas chamber of the first main valve leads, if the first servo valve fails, to an increase in pressure in the first gas chamber of the second main valve, whereby it is ensured that the main valve is safely closed.