Flow governor assemblies for use in medicinal inhalers
AssigneeKindeva Drug Delivery L.P.
InventorsChristopher G. Blatchford, Romain U. G. Guion, Christopher B. J. Groombridge, Simon L. Calcutt
Life of this patent
Estimating the term…
Abstract
A flow governor assembly for use with a medicinal inhaler. The assembly can include a housing that defines an air flow path; a flow governor positioned in the air flow path to govern air flow in the air flow path to a target governing volumetric flow rate; and a constriction in the air flow path. The flow governor can be configured to provide a variable, or dynamic, resistance to air flow in the air flow path as a function of air pressure drop between an inlet and an outlet of the flow governor. The constriction can be configured to provide a fixed, or static, resistance to air flow in the air flow path.
Claims18
A flow governor assembly for use with a medicinal inhaler, the assembly comprising:
- a housing;
- an air flow path defined by the housing and including an air inlet and an air outlet;
- a flow governor positioned in the air flow path between the air inlet and the air outlet to govern air flow in the air flow path to a target governing volumetric flow rate, the flow governor configured to provide a dynamic resistance to air flow in the air flow path as a function of air pressure drop between an inlet and an outlet of the flow governor;
- a first pressure sensor and a second sensor;
- a constriction in the air flow path located between the air inlet and the air outlet and comprising a venturi section, the constriction configured to provide a static resistance to air flow in the air flow path, wherein the venturi section is positioned upstream of the flow governor and adjacent the first pressure sensor to sense the pressure through the venturi section;
- and
- wherein the second pressure sensor is located downstream the flow governor.
Dependencies are inferred from the claim text.