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:
Jan. 30, 2007
Filed:
Mar. 09, 2005
Atsuhito Gama, Nagoya, JP;
Shinichiro Hata, Nagoya, JP;
Hiroyuki Yamada, Nagoya, JP;
Kazuya Hirota, Nagoya, JP;
Atsuhito Gama, Nagoya, JP;
Shinichiro Hata, Nagoya, JP;
Hiroyuki Yamada, Nagoya, JP;
Kazuya Hirota, Nagoya, JP;
Rinnai Corpoartion, Nagoya, JP;
Abstract
When a fluid flow channel is interrupted while an electronic circuit unitincluding a microcomputerand the like receives electric source power, a flow control valve is displaced to a predetermined position closer to a first end of both ends of a motion range of the flow control valve in the fluid flow channel by a stepping motor. When the supply of electric source power is restarted after the supply of electric source power to the electronic circuit unitis stopped, a predetermined number of pulses capable of displacing the flow control valve from the first end to a home position are supplied to the stepping motorto displace the flow control valve to the home position with a second end of both ends of the motion range of the flow control valve being the home position of the flow control valve. Thus, the flow control valve is shifted to the home position while preventing occurrence of a disorder of the stepping motor, abnormal sounds and vibrations, in a simple configuration, without requiring means for detecting arrival of the flow control valve at the home position.