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:
Sep. 28, 2010
Filed:
Mar. 17, 2005
Derk Vegter, Amsterdam, NL;
Derk Vegter, Amsterdam, NL;
Honeywell International Inc., Morristown, NJ (US);
Abstract
A fail-safe circuit and fail-safe methods for controlling gas valves are provided. In one illustrative embodiment, a fail-safe circuit includes at least one input that can be connected to a control device and at least one output that can be connected to a gas valve. In some cases, the fail-safe circuit may only supply an output voltage for opening the gas valve if the input signal received from the control device includes at least two different successively applied frequency signals. Other methods and embodiments are also contemplated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile