An inhaler comprising a tubular body ( 1 ) defining a tubular air flow passage with a bendable section, preferably a U-shaped section comprising peripherally extending corrugations and means for supplying a dose of at least one active inhalable, particulate substance into the flow passage and a cap ( 2 ). According to the invention the dose of the at least one active, inhalable particulate substance is placed in the cap ( 2 ) to be released from said cap substantially at the beginning of the corrugations in the intake direction.
1. An inhaler comprising:
a tubular body having inlet and outlet ends defining a tubular air flow passage therebetween and a bendable generally U-shaped section having a region with peripherally extending corrugations forming a whirl chamber; and
a cap attaching to the inlet and outlet ends of the tubular body and connecting said ends; and
at least one closed compartment in communication with the cap and including a dose of at least one active inhalable particulate substance, the closed compartment including a sealable opening, such that when the sealable opening is opened, said particulate substance is dispensed from said closed compartment though the inlet end of the tubular body into the tubular flow passage at a beginning section of the corrugation region;
wherein when the user inhales air from the outlet end of the tubular air flow passage, the particulate substance is drawn through the corrugation region so that the particulate substance is suspended in the air inhaled by the user.
2. An inhaler according to claim 1 , characterized in that the sealable opening is closed by a tear-off foil.
3. An inhaler according to claim 2 , characterized in that the tear-off foil is composed of a laminate barrier foil.
4. An inhaler according to claim 3 , characterized in that the laminate barrier foil is composed of a layer of aluminum covered by a layer of polypropylene on both sides.
5. An inhaler according to claim 2 characterized in that the tear-off foil is adapted to be removed after attaching an attachable part to the cap.
6. An inhaler according to claim 1 , characterized in that the sealable opening is closed by a piercable foil, and that the tubular body is adapted to pierce said foil, when the cap is attached to said tubular body.
7. An inhaler according to claim 1 , characterized in that the sealable opening is closed bending said tubular body, and that said sealable opening is opened by unbending said tubular body.
8. An inhaler according to claim 7 , characterized in that the cap keeps the tubular body bent while not in use.
9. An inhaler according to claim 1 , characterized in that the sealable opening is closed by a squeezing device therein squeezing together a part of the tubular body, the sealable opening being opened by removing the squeezing device.
10. An inhaler according to claim 1 , characterized in that the closed compartment comprises a tube-like body, in which one end is permanently closed, and the other end is adapted to be inserted into the tubular body, said sealable opening being closed by means sticking a part of the walls of said tube-like body together, said sealable opening may be opened by a supplying pressure to or pulling at said tube-like body.
11. An inhaler according to claim 1 , characterized in that the sealable opening is closed by a rotating, slidable element with at least one hole, where said rotating, slidable element has a first and a second position, and in said the position is adapted to close said sealable opening, and in the second position is adapted to open said sealable opening by communicating said closed compartment with said hole.
12. An inhaler according to claim 11 , characterized in that the rotating, slidable element comprises friction elements, and that said friction elements are adapted to hold said rotating, slidable element in the first position, to produce some friction while said rotating, slidable element is rotated from said first position to said second position and fixate said rotating, slidable element at said second position.
13. An inhaler according to claim 1 , characterized in that the cap is constructed from a soft, squeezable material, that the closed compartment is likewise constructed from a soft, squeezable material, and that said closed compartment is adapted to rupture along the sealable opening, when a pressure is applied to said cap.
14. An inhaler according to claim 1 , characterized in that the material of the closed compartment is adapted in such a manner that when it ruptures, the material is not dispensed to the tubular body.
15. An inhalator according to claim 1 further comprising two or more tubular bodies wherein the cap is adapted to accommodate the two or more tubular bodies.
16. An inhaler according to claim 1 , characterized in that the cap is in communication with two closed compartments, each compartment containing a separate, inhalable particulate substance.
17. An inhaler according to claim 3 characterized in that the tear-off foil is adapted to be removed after attaching an attachable part to the cap.
18. An inhaler according to claim 4 characterized in that the tear-off foil is adapted to be removed after attaching an attachable part to the cap.