Valve
AssigneeInvox Belgium NV
InventorsFrank Bartels, Juergen Rawert
Life of this patent
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Abstract
A valve for an inhalation device for generation of an aerosol of a medically active liquid may include: a housing, inside this housing a reservoir for storing medically active liquid, downstream from this reservoir a pumping unit for generation of a pressure connected to a means for the delivery of mechanical energy to said pumping unit, and downstream said pumping unit a nozzle; wherein the pumping unit includes a hollow cylindrical part and a piston, the cylindrical part having an interior space configured to receive an end portion of said piston, wherein said cylindrical part and said piston are linearly moveable relative to one another such as to form a pumping chamber having a variable volume.
Claims20
An inhalation device for generating an aerosol of a medically active liquid and for the inhalative administration of the aerosol of said medically active liquid, said inhalation device comprising:
- a housing;
- a reservoir within the housing for storing said medically active liquid;
- a pumping unit, downstream from the reservoir, for generation of a pressure and connected to a spring;
- and
- a nozzle downstream from the pumping unit;
- wherein the pumping unit comprises a hollow cylindrical part and a piston, the hollow cylindrical part having an interior space configured to receive an end portion of said piston, wherein said hollow cylindrical part and said piston are linearly moveable relative to one another such as to form a pumping chamber having a variable volume;
- and
- a check valve configured to allow liquid flow in a downstream direction and prevent liquid flow in an opposite direction, the check valve comprising a moveable body and a seat arranged upstream from the moveable body, the seat being arranged at a downstream opening of a hollow seat extension section having an upstream opening, and wherein the moveable body further comprises a protrusion having a solid body that extends through the seat and past said upstream opening of said hollow seat extension section, the protrusion being dimensioned to leave a gap between its lateral surface and an inside of said hollow seat extension section, wherein the protrusion has an upstream end configured to mechanically interact with an upstream end of said hollow seat extension section to delimit movement of the moveable body in a downstream direction.
Dependencies are inferred from the claim text.