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:
Apr. 26, 1988
Filed:
Nov. 18, 1986
Takeo Matsuura, Anjo, JP;
Yukio Mori, Nagoya, JP;
Toshio Tanahashi, Toyota, JP;
Akira Muramatsu, Kariya, JP;
Ryo Nagasaka, San Francisco, CA (US);
Mikiyasu Kouketsu, Ichinomiya, JP;
Yukio Sawada, Kariya, JP;
Hiroshi Hasegawa, Nagoya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An apparatus for measuring a flow rate of gas comprises a gas passage through which the gas to be measured flows in an axial direction thereof, a movable member linearly movable being disposed in the gas passage in a gas flow direction, a flow pipe providing therein the gas passage, a cross-sectional area of the flow pipe being increased along the gas flow direction in at least over a moving range of the movable member, a rod secured to the movable member to extend from the movable member along the gas flow direction, a bearing for bearing the rod for movement in response to moving of the movable member, the bearing being disposed in the gas passage and secured to the flow pipe, a helical spring for urging the movable member towards a direction opposite to the gas flow direction, a potentiometer for converting an amount of displacement of the rod into an electric signal, an amount of the displacement of the rod corresponding to that of movement of the movable member, a first cylinder closed at one end thereof by the movable member and opened at the other end thereof, the first cylinder extending along the gas flow direction, and a second cylinder disposed in the gas passage and secured to the flow pipe, the second cylinder being closed at one end thereof and opened at the other end thereof, the second cylinder being engaged at the other end thereof with the other end of the first cylinder through a minute clearance therebetween.