Metering device for the inhalation of a pulverulent substance

Patent metadata

Field	Value
Publication number	US-9895501-B2
Application number	US-201314021915-A
Country	US
Kind code	B2
Filing date	Sep 9, 2013
Priority date	Nov 22, 2007
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A metering device activated by a user induced airstream for an inhalation of a medicinal substance. The device includes: a closure cap; a piston; a mouthpiece; and an annular chamber disposed upstream of the mouthpiece. A storage chamber stores the substance which can be moved out of the storage chamber when the closure cap is removed. A metering rod for removing the medicinal substance out of the storage chamber into an emptying-standby position. In the emptying-standby position, the metering chamber is closed by the piston. The piston is displaceable by airstream into an emptying-release position. In the emptying-release position, a metering chamber is released and the substance removed by the suction airstream. The metering device includes an outer cylinder which accommodates an inner cylinder.

First claim

The invetion claimed is:

1. A metering device activated by a user induced airstream for an inhalation of a medicinal substance, the metering device comprising:
a closure cap;
a piston;
a mouthpiece;
an annular chamber disposed upstream of said mouthpiece;
a storage chamber storing said medicinal substance which can be moved out of said storage chamber when said closure cap is removed;
a metering rod comprising a metering chamber for removing said medicinal substance out of said storage chamber into an emptying-standby position,
in said emptying-standby position, said metering chamber being closed by said piston,
said piston being displaceable by said airstream into an emptying-release position,

in said emptying-release position, said metering chamber being released and said substance removed by said suction airstream; and

wherein said piston comprises
a piston head and
two axially oriented tongues extending from an underside of said piston head, wherein along a lower free periphery, said tongues are split from one another.

2. The metering device according to claim 1 , wherein
said tongues along the lower free periphery, accommodate a cross-sectional contour of a guide portion of an inner cylinder.

3. The metering device according to claim 1 , wherein
along the lower free periphery, said tongues are configured split in a lip-like manner.

4. The metering device according to claim 1 , wherein
said pair of axially oriented tongues comprise a free peripheral region and
said free peripheral regions comprise material-reinforced sealing surfaces.

5. The metering device according to claim 1 , wherein
said pair of axially oriented tongues are configured to help guide a flat part of said metering rod,
wherein said flat part of said metering rod resides between said pair of axially oriented tongues having a stripping and sealing action.

6. A metering device activated by a user induced airstream for an inhalation of a medicinal substance, the metering device comprising:
a closure cap;
a piston;
a mouthpiece;
an annular chamber disposed upstream of said mouthpiece;
a storage chamber storing said medicinal substance which can be moved out of said storage chamber when said closure cap is removed;
a metering rod comprising a metering chamber for removing said medicinal substance out of said storage chamber into an emptying-standby position,
in said emptying-standby position, said metering chamber being closed by said piston,
said piston being displaceable by said airstream into an emptying-release position,

in said emptying-release position, said metering chamber being released and said substance removed by said suction airstream;
an outer cylinder; and
a radially-oriented flow channel passing through the outer cylinder,
wherein in said as yet closed emptying-standby position, said metering chamber is in axial alignment with the radially-oriented flow channel, in order to allow a visual check of said piston through the radially-oriented flow channel.

Assignees

• Sanofi Sa
• Sanofi Aventis Deutschland

Inventors

• Von Schuckmann Alfred
• Kamlag Yorick
• Mayer Stefan
• Sandell Dennis

Classifications

• A61M15/0006

  using rotating means · CPC title

• A61M2202/064

  Powder · CPC title

• A61M15/0086

  Inhalation chambers · CPC title

• A61M15/0025

  with caps · CPC title

• A61M15/0065 Primary

  Inhalators with dosage or measuring devices (A61M15/0028 takes precedence; dosage devices incorporated in aerosol cans B65D83/52) · CPC title