초록 ▼

A miniaturized device for pressurizing fluid. The device includes a hollow piston that provides a fluid path and a valve member. The valve member is configured for axial movement so that the valve axis remains parallel to the piston axis. The valve member is arranged at one end of the hollow piston.

A miniaturized device for pressurizing fluid. The device includes a hollow piston that provides a fluid path and a valve member. The valve member is configured for axial movement so that the valve axis remains parallel to the piston axis. The valve member is arranged at one end of the hollow piston. The valve member may be partially or completely disposed within the hollow piston. The device is particularly adapted for use in a mechanically operated atomizer to produce an inhalable aerosol of a liquid medicament without the use of propellant gas.

대표청구항 ▼

[ We claim:] [1.] A device for atomizing fluid, comprising:a housing having an upper housing part and a lower housing part;a pump housing disposed in said upper housing part;a nozzle disposed at one end of said pump housing;a cylinder disposed in said pump housing, said cylinder defining a pressure

[ We claim:] [1.] A device for atomizing fluid, comprising:a housing having an upper housing part and a lower housing part;a pump housing disposed in said upper housing part;a nozzle disposed at one end of said pump housing;a cylinder disposed in said pump housing, said cylinder defining a pressure chamber;a hollow piston having a piston axis disposed in said cylinder;a valve member having a valve axis, said valve member configured for axial movement with said piston wherein the valve axis remains parallel to the piston axis, said valve member movable between an open position and a closed position, wherein fluid flows into said pressure chamber when said valve member is in the open position;a spring housing rotatably mounted on said upper housing part;a spring disposed in said spring housing; anda blocking mechanism for retaining said spring in a biased state, wherein release of said spring from the biased state causes said valve member to move to the closed position and causes said hollow piston to pressurize fluid in said pressure chamber to form pressurized fluid that is atomized by said nozzle as it exits the device.