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:
Mar. 26, 2019
Filed:
Jan. 27, 2011
Daisuke Konishi, Hyogo, JP;
Akira Ohta, Hyogo, JP;
Yoshihisa Kitano, Hyogo, JP;
Tomoya Nakano, Hyogo, JP;
Yoshifumi Atobe, Hyogo, JP;
Haruki Inoue, Hyogo, JP;
Yoshitaka Kimura, Hyogo, JP;
Ryo Ikeda, Hyogo, JP;
Tomoki Kishimoto, Hyogo, JP;
Yasuhide Ikeuchi, Hyogo, JP;
Tomoko Ikeuchi, Hyogo, JP;
Daisuke Konishi, Hyogo, JP;
Akira Ohta, Hyogo, JP;
Yoshihisa Kitano, Hyogo, JP;
Tomoya Nakano, Hyogo, JP;
Yoshifumi Atobe, Hyogo, JP;
Haruki Inoue, Hyogo, JP;
Yoshitaka Kimura, Hyogo, JP;
Ryo Ikeda, Hyogo, JP;
Tomoki Kishimoto, Hyogo, JP;
Yasuhide Ikeuchi, Hyogo, JP;
Noritz Corporation, , JP;
Abstract
A solenoid valve driving apparatus includes switching means for ON/OFF-controlling application of a direct current voltage to a solenoid of a solenoid valve, and signal outputting means. A first period and a consecutive second period are set as a valve opening operation period of the solenoid valve. When the signal outputting means outputs the PWM signal to the switching means, a duty ratio of the output signal is set to be higher in the second period than in the first period so that a power supplied to the solenoid is larger in the second period than in the first period. As a result, a valve opening operation is performed in the solenoid valve reliably, and loud noise generation during the valve opening operation is suppressed.