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:
Aug. 28, 1984
Filed:
Nov. 29, 1982
Haruo Katsumata, Iwaki, JP;
Takeshi Matsuya, Iwaki, JP;
Hitoshi Saitoh, Iwaki, JP;
Shigeru Yasuki, Yokohama, JP;
Yukio Sato, Tokyo, JP;
Masaru Osaki, Yokohama, JP;
Minoru Komeno, Yokohama, JP;
Takayuki Arai, Ichikawa, JP;
Shigeki Ochi, Yokohama, JP;
Tatsuo Ino, Tokyo, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Fuji Electric Company Limited, Kanagawa, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Hyogo, JP;
Abstract
The air flow rate of a fan driven by a motor controlled by an adjustable speed control equipment is automatically controlled by stopping the adjustable speed control equipment in response to a fault signal therefrom during operation with an inlet vane installed upstream of the fan in fully open state, simultaneously throttling the inlet vane at a preset speed to a degree of opening appropriate for the load by means of a control circuit, and, after a period for reduction of residual voltage of the motor, changing over to operation of the fan by a commercial power supply thereby to shift to control by the degree of opening of the inlet vane.