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. 10, 2005
Filed:
Jun. 05, 2003
Seiji Tomita, Yokosuka, JP;
Setsuro Kawasaki, Yokosuka, JP;
Motohiro Sotome, Ayase, JP;
Tsuyoshi Watanabe, Fujisawa, JP;
Seiji Tomita, Yokosuka, JP;
Setsuro Kawasaki, Yokosuka, JP;
Motohiro Sotome, Ayase, JP;
Tsuyoshi Watanabe, Fujisawa, JP;
SMC Kabushiki Kaisha, Tokyo, JP;
Abstract
A float-type flowmeter measures the rate of a fluid flowing upwardly through a tube based on the position of a float movably disposed in the tube and including a magnetic material. A coil is wound around the tube such that the intervals gradually decrease in an axial direction. The coil is excited by an alternating current supplied from an inductance change detector. The inductance change detector detects a change in the inductance of the coil which is caused when the float moves in the axial direction, and generates a voltage. A voltage-to-position (flow rate) converter determines a flow rate from the voltage corresponding to the position of the float.