×

Dry powder inhaler and process that explosively discharges a dose of powder and gas from a soft plastic pillow

  • US 5,349,947 A
  • Filed: 07/15/1993
  • Issued: 09/27/1994
  • Est. Priority Date: 07/15/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A powder inhaler assembly for dispersing medication, said assembly not using a propellant, said assembly comprising a pillow containing a dose of powdered medication and gas, said pillow constructed of plastic means for explosively discharging the powdered medication and gas from inside said pillow comprising a housing having a dispersal chamber, means providing an exit from said chamber for transporting dispersed medication to a patient, a support in said housing, said support having a depression of predetermined shape and having a maximum transverse dimension of predetermined size, said depression having an outlet orifice which is small relative to said predetermined size, a piston positioned opposite to said depression and having a surface confronting said depression which at least in part conforms to said depression, means for moving said piston towards said depression to compress a medication pillow therein, means associated with said piston and said depression for providing peripheral support to a medication pillow, said pillow being completely restrained except for said orifice, the gas in said pillow compressing responsive to continued movement of said piston toward said depression and resulting in explosive rupturing of said pillow, said dose and gas exploding and deaggregating into said orifice and through said orifice, for inhalation by a patient, wherein said exit means includes a conduit means from said orifice to said dispersal chamber for transmission of aerosolized medication to a patient.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×