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. 15, 1991
Filed:
Dec. 07, 1988
Yoritaka Isoda, Amagasaki, JP;
Lintec Co., Ltd., Shiga, JP;
Abstract
A mass flowmeter comprising heat sensitive coils mounted at an upstream position and a downstream position of a conduit through which a fluid flows. The heat sensitive coils have a resistance variable with the fluid temperature, and are each included in a constant temperature difference circuit. This circuit further includes an ambient temperature detecting resistor having approximately the same characteristics as the heat sensitive coils, and a temperature difference setting resistor having approximately zero temperature coefficient. These resistors are connected in series to the heat sensitive coil. The circuits are connected to a control unit which controls differences between temperatures of the heat sensitive coils and ambient temperature to be approximately the same as a value set by the temperature difference setting resistor. A mass flow rate of the fluid through the conduit being measured by detecting a difference in amounts of energy supplied to the heat sensitive coils.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile