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:
Dec. 29, 2009
Filed:
Apr. 03, 2006
Yoshihiro Ushigusa, Gyoda, JP;
Hiroki Igarashi, Gyoda, JP;
Masahiro Hasunuma, Gyoda, JP;
Surpass Industry Co., Ltd., Saitama, JP;
Abstract
Provided are a flow meter and a flow-rate control system using the same that is capable of measuring a flow rate in a minute flow-rate region with excellent measurement accuracy by preventing or suppressing the generation of bubbles and in which accumulation of the fluid and the bubbles is less likely to occur. The flow meter is for measuring a minute flow rate of a fluid flowing through a fluid channel whose outlet environment is set to constant pressure, the flow meter including a flow-rate measurement conduit portion having a predetermined length connected to an outlet-side end of the fluid channeland whose outlet environment is set to constant pressure by setting the cross-sectional area of a channel smaller than the fluid channel; a pressure sensor for detecting the pressure of the fluid at the upstream side of the flow-rate measurement conduit portion by being disposed near an outlet of the fluid channel; and a pressure-detection control unitfor calculating a flow rate from a fluid pressure detected at the pressure detection part.