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:
Oct. 21, 2025
Filed:
Jan. 30, 2023
Fujikoki Corporation, Tokyo, JP;
Hiroshi Hagimoto, Tokyo, JP;
Yusuke Ishizuka, Tokyo, JP;
FUJIKOKI CORPORATION, Tokyo, JP;
Abstract
An electric valve control device inputs pulses to a stepping motor to rotate a rotor in a second direction; inputs pulses to the stepping motor to rotate the rotor in a first direction when the electric valve is in a second-direction-rotation restricted state; obtains the number of pulses (an input number (Xi)) input to the stepping motor from the second-direction-rotation restricted state to a first-direction-rotation restricted state when the electric valve is in the first-direction-rotation restricted state while the rotor rotates in the first direction; determines that the rotor can rotate normally when the input number (Xi) is greater than or equal to a design number (Xd) and is smaller than or equal to an upper limit number (Xu); and determines that the rotor cannot rotate normally when the input number (Xi) is smaller than the design number (Xd) or is greater than the upper limit number (Xu).