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:
Nov. 27, 2001
Filed:
Dec. 09, 1999
Andrew S. Kadah, Manlius, NY (US);
Other;
Abstract
An arrangement for driving a pair of actuator solenoids or coils of a gas valve having two or more solenoids employs a microprocessor or similar controller and an driver circuit. An output terminal of the microprocessor provides a steady low for OFF and a pulsating output signal for ON. A transistor switching device is gated by the microprocessor, drives the first solenoid as its collector load. A rectifying diode connects the first solenoid to an accumulator capacitor, which ramps up from flyback pulses that pass through the rectifier. A negative resistance discharge device conducts when the accumulated voltage exceeds a threshold to energize the second solenoid. In a favorable embodiment the impedance of the second solenoid is higher than the first solenoid. In a second embodiment, the actuator circuit for the second solenoid can be a voltage doubling flyback driven relaxation oscillator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile