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:
Aug. 28, 2012
Filed:
Aug. 31, 2010
Applicants:
Yoshihiro Fukano, Moriya, JP;
Shigeharu Oide, Adachi-ku, JP;
Takayoshi Hatou, Toride, JP;
Hidenori Ogawa, Kawagoe, JP;
Inventors:
Yoshihiro Fukano, Moriya, JP;
Shigeharu Oide, Adachi-ku, JP;
Takayoshi Hatou, Toride, JP;
Hidenori Ogawa, Kawagoe, JP;
Assignee:
SMC Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 47/00 (2006.01); H01H 47/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A solenoid valve driving circuit for a solenoid valve includes a current detector for detecting a current that flows in a solenoid coil, a rate of change over time calculating unit for calculating a rate of change over time of the detected current, and a maintaining state transition determining unit for determining a timing at which transition from a first period to a second period occurs based on the calculated rate of change over time.