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. 29, 1980
Filed:
Apr. 11, 1978
Applicant:
Inventors:
Kei Kimata, Aichi, JP;
Tsugito Nakazeki, Iwata, JP;
Assignee:
NTN Toyo Bearing Company Limited, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ; F02M / ;
U.S. Cl.
CPC ...
137613 ; 137487 ; 1231 / ;
Abstract
An area type flow rate measuring device comprising an upstream valve and a downstream valve which are disposed in a channel for a fluid, a feedback control mechanism for keeping the pressure difference across the upstream valve constant, the rate of flow of the fluid being measured on the basis of the area of opening of the upstream valve, a pipeline which bypasses the upstream valve, and a mechanism disposed in the bypass pipeline for amplifying the pressure difference by utilizing the flow of the fluid, the arrangement being such that the pressure produced in the mechanism is utilized to drive a valve opening mechanism.