Reciprocating piston flow meter with a fluid bypass
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorMakoto Sanada
Life of this patent
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Abstract
A slow flow meter having a free piston slideably mounted in a cylinder with a non-contact type detector measuring movement of the same. A bypass is provided between fluid inflow and outflow pipes connected to opposite ends of the cylinder. A forcible returning device is operatively associated with the bypass controller to return the free piston to its original position after measurement.
Claims4
A flow meter of the type that a displacement amount of a free piston resulting from the same being moved in a cylinder by supplying fluid thereinto is detected by a non-contact type detecting means to measure a flow rate of the fluid, characterized in that there is provided a bypass connecting between fluid inflow and outflow pipes which are connected to both end portions of the cylinder;
- and there is additionally provided a source of fluid to be measured and a separate forcible returning means for returning the free piston to its original position operated simultaneously with opening of the foregoing bypass after the completion of an advancing stroke of the free piston, said forcible returning means comprising a pump interposed in the bypass;
- and in that the free piston is constructed by a combination of a nonconducting material tubular body and a conductive material end plate closing at least one end opening of the tubular body.
Dependencies are inferred from the claim text.