Invention Grant
- Patent Title: Flowmeter and flow-rate controller
- Patent Title (中): 流量计和流量控制器
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Application No.: US12698184Application Date: 2010-02-02
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Publication No.: US08205635B2Publication Date: 2012-06-26
- Inventor: Hiroki Igarashi
- Applicant: Hiroki Igarashi
- Applicant Address: JP Gyoda-shi
- Assignee: Surpass Industry Co., Ltd.
- Current Assignee: Surpass Industry Co., Ltd.
- Current Assignee Address: JP Gyoda-shi
- Agency: Pearne & Gordon LLP
- Priority: JP2009-024713 20090205
- Main IPC: F16K31/12
- IPC: F16K31/12 ; F16K31/36

Abstract:
A flowmeter in which a flow rate can be measured over a wide flow-rate range while an increase in the cost of manufacture thereof is minimized, and a flow-rate controller equipped with such a flowmeter are provided. Provided are an upstream-side pressure sensor that measures the pressure of a fluid in an upstream-side channel, a downstream-side pressure sensor that measures the pressure of the fluid in a downstream-side channel, a first throttle section disposed between the upstream-side channel and the downstream-side channel and having a channel area that is smaller than that of at least the upstream-side channel, a bypass channel branching off from between the upstream-side pressure sensor in the upstream-side channel and the first throttle section and connected with the downstream-side channel, an on/off valve that controls the flow rate of the fluid flowing through the bypass channel, and a second throttle section disposed between the bypass channel and the downstream-side channel and having a channel area that is smaller than that of at least the bypass channel.
Public/Granted literature
- US20100193056A1 FLOWMETER AND FLOW-RATE CONTROLLER Public/Granted day:2010-08-05
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