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:
Sep. 16, 2003
Filed:
May. 23, 2001
Yoshio Akamatsu, Nara, JP;
Naoto Naganuma, Tenri, JP;
Mitsumasa Matsumura, Kitakatsuragi-gun, JP;
Yoshiteru Kagomoto, Kashihara, JP;
Hiroyuki Senda, Ikoma, JP;
Mitsuo Yokohata, Habikino, JP;
Kazuyoshi Hatano, Kitakatsuragi-gun, JP;
Tadashi Yanagisawa, Yamatokoriyama, JP;
Kouichi Murakami, Ikoma, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Gas flow control apparatus that includes a gas flow control unit having a gas flow adjusting capability and a gas closing capability of selectively opening and closing a gas. A stepping motor is used for driving the gas flow control unit. A drive control unit is provided for controlling the stepping motor. The gas flow control unit is capable of adjusting the gas flow in multiple stages by selectively opening and closing one of a plurality of gas flow adjusting holes and also capable of varying the gas flow in multiple stages by selectively opening and closing one of the plural gas flow adjusting holes according to a number of pulses of the stepping motor.