Dry powder inhaler

Details Dry powder inhaler Dry powder inhaler

1999-07-13

2001-12-11

Lewis, Aaron J. (Department: 3761)

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

C128S203210

Reexamination Certificate

active

06328034

ABSTRACT:

BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The field of the invention is inhalers. More specifically, the invention relates to inhalers for delivering drugs in a solid finely divided dry powder or fluid form.
Inhalers are used to deliver drugs into a patient's lungs. Typically, an inhaler contains or provides a mixture of drugs and air or propellants. The mixture is delivered via the patient inhaling from a mouthpiece on the inhaler, for treatment of various conditions, for example, bronchial asthma. However, delivery of drugs via inhalation can be used for many other treatments, including those unrelated to lung condition.
One well known inhaler, the Diskhaler, described in U.S. Pat. No. 4,627,432, uses individual drug doses sealed within blisters on a blister disk. The disk is advanced by a knob with each successive dose. However, while the device described in U.S. Pat. No. 4,627,432 has met with varying degrees of success, disadvantages remain in indexing or advancing a blister disk within an inhaler, with opening the blisters to access the drug contents, with reliably providing intended dosages, and in other areas.
Accordingly, it is an object of the invention to provide an improved inhaler.
SUMMARY OF THE INVENTION
To these ends, the present inhaler preferably includes a cover plate pivotably attached to a lid on an inhaler housing. A blister pack disk is rotatably mounted on the housing under the cover plate, and is movable in a single forward direction. An actuator in the housing is most desirably aligned with a lever on the cover plate. The patient pushes the actuator which shears open a blister on the disk and then causes the lever to crush the blister, to deliver the drug powder contents of the blister into a duct within the housing, for subsequent inhalation by the patient.
Other and further objects will appear hereinafter.


REFERENCES:
patent: 5033463 (1991-07-01), Cocozza
patent: 5048514 (1991-09-01), Ramella
patent: 5113855 (1992-05-01), Newhouse
patent: 5201308 (1993-04-01), Newhouse
patent: 5327883 (1994-07-01), Williams et al.

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