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:
Apr. 22, 2008
Filed:
Apr. 09, 2004
Takeshi Yano, Tokyo, JP;
Toshiro Higuchi, Yokohama, JP;
Kenichi Kudoh, Tokyo, JP;
Sze Keat Chee, Tokyo, JP;
Tsunehiko Shibata, Tokyo, JP;
Norimasa Ikeda, Tokyo, JP;
Takeshi Yano, Tokyo, JP;
Toshiro Higuchi, Yokohama, JP;
Kenichi Kudoh, Tokyo, JP;
Sze Keat Chee, Tokyo, JP;
Tsunehiko Shibata, Tokyo, JP;
Norimasa Ikeda, Tokyo, JP;
Satake Corporation, Tokyo, JP;
Abstract
The air valve includes a valve body for controlling operations to open and close the communication between an air pressure chamber and an air outlet, a piezoelectric element for generating driving force in the form of displacements, and a displacement enlarging mechanism for enlarging the small displacements generated by the piezoelectric element by the principle of a pry and applying the enlarged displacements to the valve body. The enlarged displacements cause a large and sufficient gap to be developed between the air pressure chamber and the air outlet when a voltage is applied to the piezoelectric element. When the applying of voltage to the piezoelectric element is stopped, the resetting force of the piezoelectric element itself causes the gap to be closed quickly.