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, 1997
Filed:
Jan. 26, 1996
Masanori Amemori, Higashi-Matsuyama, JP;
Toshiyuki Hasegawa, Higashi-Matsuyama, JP;
Takeshi Miyamoto, Higashi-Matsuyama, JP;
Shinya Nozaki, Higashi-Matsuyama, JP;
Takashi Kobayashi, Higashi-Matsuyama, JP;
Zexel Corporation, Tokyo, JP;
Abstract
A flowmeter which obtains the flow rate of a fluid by detecting the rotational speed of an impeller is provided with a transmitter for transmitting a laser beam or ultrasonic wave to the tip end of the rotating impeller, a receiver for capturing the laser beam or ultrasonic wave reflected by the impeller, and a data processing unit for calculating the difference between the frequency of signals captured by the receiver and the frequency of signals transmitted by the transmitter and for calculating the rotational speed of the impeller based on the calculated values.