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. 20, 1983
Filed:
Jan. 20, 1982
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi, JP;
Abstract
A flowmeter comprises a first tube having a first flow passage therethrough with its cross-sectional area being smaller at the outlet than at the inlet, a second tube disposed substantially concentrically within the first flow passage and having a second flow passage therethrough with its cross-sectional area being minimum substantially midway thereof, a third flow passage providing fluid communication between ports opening respectively at a sidewall of the second tube into the second flow passage adjacent to the minimum portion and at a sidewall of the first tube into the first flow passage, and a sensor disposed in either the third flow passage, the sidewall of the first tube, or the sidewall of the second tube for detecting periodic variations of a fluid flowing through the first, second, or third flow passage. The flowmeter detects the frequency of variations in the pressure or speed of a fluid, thus detecting the rate of flow of the fluid through the first and second tubes.