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:
Jan. 21, 2014
Filed:
Feb. 09, 2010
Lyman Wycoff, Chester, VA (US);
Larry Howington, Chesterfield, VA (US);
Lyman Wycoff, Chester, VA (US);
Larry Howington, Chesterfield, VA (US);
Hill Phoenix, Inc., Conyers, GA (US);
Abstract
The present application relates to a power failure controller for an electronically controlled expansion valve in a refrigeration system. The valve is controlled by a valve controller configured to close the valve as a part of a power-up routine when the valve controller is first powered-up from a powered-down state. The power failure controller includes a circuit configured to allow the valve controller to enter the powered-down state when a power failure is detected and to subsequently provide power to the valve controller from a capacitor bank coupled to the circuit so that the valve controller conducts the power-up routine and closes or mostly closes the valve.