Patent ID: 8048022

Claim:
A disposable assembly for releasable coupling engagement with a reusable flow sensor assembly, the disposable assembly comprising: a body having a lid portion and a base portion, the body defining a fluid flow passage and forming an inlet and an outlet, the lid portion having a first opening and a second opening and being secured to the base portion; a flow restricting element extending completely across the fluid flow passage at a location between the inlet and the outlet and between the first opening and the second opening, the flow restricting element having an orifice formed therethrough and being positioned in the base portion; a fluid pressure membrane disposed along the fluid flow passage between the inlet and the outlet, the fluid pressure membrane being captured between the lid portion and the base portion of the body and defining a fluid pressure responsive movable wall having an external surface remote from the fluid flow passage, the external surface being accessible through the first opening and the second opening of the lid portion for releasable coupling engagement with the reusable flow sensor assembly.