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:
Apr. 17, 2018
Filed:
May. 29, 2015
Emerson Electric Co., St. Louis, MO (US);
James B. Prichard, Dardenne Prairie, MO (US);
Donald L. Blessing, Manchester, MO (US);
Mark H. Stark, St. Louis, MO (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
Gas flow controllers for use in gas fired apparatus including a pilot burner and a main burner are described. A controller includes a pilot valve moveable between a closed position and an open position to provide selective fluid communication between a gas inlet and the pilot burner, a main burner valve providing selective fluid communication between the gas inlet and the main burner, an actuator configured to open the pilot valve, a flow controller valve operable to open and close a fluid flow path between the gas inlet and a back side of the main burner valve upon actuation of the actuator, and a decoupling mechanism. The decoupling mechanism is configured to connect the actuator to the pilot valve and to selectively disconnect the actuator from the pilot valve when the actuator is actuated and a pressure differential across the pilot valve exceeds a threshold pressure limit.