Determination of Cartridge Content by Capacitive Means
First Claim
1. A cartridge for coupling to a medication delivery device, the cartridge being adapted to contain a medicament to be expelled from the medication delivery device, the cartridge comprising:
- a body having a sidewall portion being made of an essentially electrically non-conducting material,a first electrically conducting layer forming part of or being arranged on a first part of the sidewall portion,a first electrically non-conducting intermediate layer arranged on the first electrically conducting layer, anda first electrically conducting shield layer arranged on the first electrically non-conducting layer.
1 Assignment
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Accused Products
Abstract
The present invention relates to a replaceable cartridge (4) for a medication delivery device (1), the cartridge being adapted to contain a medicament to be expelled from the medication delivery device, the cartridge comprising a sidewall (2, 3) portion being made of an essentially electrical non-conducting material, a first electrically conducting layer (+) forming part of a first part of the sidewall portion, and a first electrically non-conducting intermediate layer arranged on the first electrically conducting layer, and a first electrically conducting shield layer arranged on the first electrically non-conducting layer.
32 Citations
24 Claims
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1. A cartridge for coupling to a medication delivery device, the cartridge being adapted to contain a medicament to be expelled from the medication delivery device, the cartridge comprising:
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a body having a sidewall portion being made of an essentially electrically non-conducting material, a first electrically conducting layer forming part of or being arranged on a first part of the sidewall portion, a first electrically non-conducting intermediate layer arranged on the first electrically conducting layer, and a first electrically conducting shield layer arranged on the first electrically non-conducting layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A handheld medication delivery device comprising an arrangement for determining an amount of medicament in a replaceable medicament containing cartridge, the arrangement comprising:
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a cartridge receiving portion comprising a first and a second electrode forming a capacitor in combination, the first and second electrodes being arranged on or integrated with the cartridge receiving portion, wherein the handheld medication delivery device further comprising electronic control means adapted to measure a capacitance of said capacitor, and to associate an amount of medicament with a measured capacitance of said capacitor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A cartridge for a medication delivery device, the cartridge being adapted to contain a medicament to be expelled from the medication delivery device, the cartridge comprising:
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a body having a sidewall portion being made of an essentially non-conducting material, an electrically conducting layer being arranged on or integrated with an exterior surface part of the sidewall portion, the electrically conducting layer having its primary extension in an axial direction of the body of the cartridge, and means for providing an electrical coupling to the medicament contained in the cartridge so that the electrically conducting layer forms a capacitor with the medicament contained in the replaceable cartridge, the medicament forming a virtual capacitor electrode of said capacitor. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification