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:
May. 03, 1994
Filed:
Jan. 15, 1992
Shigeru Nishiyama, Kanagawa, JP;
Hiroaki Hasegawa, Yokohama, JP;
Yasuji Miyata, Yokohama, JP;
Hiroshi Koido, Tokyo, JP;
Tokico Ltd., Kanagawa, JP;
Abstract
A mass flowmeter has a U-shaped sensor tube provided on a support base which is supported on a vibration absorbing member, and both ends of the sensor tube are respectively connected to an inlet and an outlet of a manifold. Vibrators are provided at an intermediate part of each straight tube part provided between the inlet and outlet sides of the sensor tube. Pickups are provided on the upstream and downstream sides of each vibrator so as to detect the displacement of the sensor tube. An external vibration is in an opposite direction between the inlet and outlet sides relative to the vibrating direction. Hence, outputs of the pickups located on the upstream sides of the vibrators are added, and outputs of the pickups located on the downstream sides of the vibrators are added. The external vibration is cancelled by obtaining a phase difference of the two added values.