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:
Dec. 27, 2016
Filed:
Jan. 19, 2012
Naoto Naganuma, Nara, JP;
Yuji Nakabayashi, Nara, JP;
Hideaki Morihana, Nara, JP;
Masaki Sugiyama, Kyoto, JP;
Hiroshi Nakai, Nara, JP;
Akihisa Adachi, Nara, JP;
Naoto Naganuma, Nara, JP;
Yuji Nakabayashi, Nara, JP;
Hideaki Morihana, Nara, JP;
Masaki Sugiyama, Kyoto, JP;
Hiroshi Nakai, Nara, JP;
Akihisa Adachi, Nara, JP;
Abstract
A shutoff valve according to the present invention includes: a motor configured to cause a rotating shaft to rotate; a lead screw formed on the rotating shaft; a lead nut into which the lead screw is screwed; and a valve element configured to block a passage, the valve element being configured to move in an axial direction in accordance with rotation of the rotating shaft. A dry lubricating coating is formed on a contact surface where the lead screw and the lead nut come into contact with each other. A thread pitch of the lead screw is set such that a current applied to the motor, the current being in relation to an inductance of the motor, is in a range that does not cause explosion of the fuel gas and that allows thrust force necessary for moving the valve element to be obtained.