Fluid flow detector having a mobile body moving between a detection channel and a discharge channel
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United States of America Patent
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Mar 13, 2012
Grant Date -
Oct 21, 2010
app pub date -
Jan 22, 2010
filing date -
Apr 21, 2009
priority date (Note) -
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Abstract
A fluid flow detector includes a detector main body defining a fluid flow channel having a fluid flow detection channel positioned adjacent an upstream hole and a discharge channel positioned adjacent a downstream hole. A mobile body is positioned within the fluid flow channel and dimensioned to be movable along the fluid flow channel. The diameter of the fluid flow detection channel is smaller than the diameter of the discharge channel, and the maximum diameter of the outer peripheral edge part of the face of the fluid flow channel orthogonal to the direction of movement of the mobile body is slightly smaller than the diameter of the fluid flow detection channel. The upstream hole and the downstream hole are formed with a size and shape such that fluid can flow through the upstream and downstream holes without being obstructed by the mobile body.
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