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US 7,727,165 B2Granted
Peak flow measurement device
AssigneeUniversity of Newcastle Upon Tyne
InventorDouglas Paul Newton
Life of this patent
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Abstract
A peak flow measurement device comprises a hollow body (1) having an inlet (8) for receiving fluid and an outlet (3), wherein the inlet (8) and outlet (3) are spaced apart from each other, the cross-sectional area of the body being greater than the cross-sectional area of the outlet and wherein in use the device is oriented such that the inlet is above the outlet and the measured peak flow is proportional to the maximum height (11) of fluid within the body.
Claims20
A fluid flow measurement device comprising:
- a hollow body having an inlet for receiving fluid and an outlet that defines a flow rate of fluid therethrough, wherein:
- the inlet and outlet are spaced apart from each other,
- the cross-sectional area of the body is greater than the cross-sectional area of the outlet,
- in use, the device is oriented such that the inlet is above the outlet and the measured fluid flow is proportional to the height of fluid within the body,
- the hollow body comprises at least two portions having different cross sectional areas, and
- the cross sectional area of the hollow body increases step-wise at a height on the body that relates to a predetermined flow rate of fluid through the outlet.
3 more elements
Dependencies are inferred from the claim text.