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US 9,144,647 B2Granted
Magnetic time delay indicator and an injection device incorporating such
AssigneeNovo Nordisk A/S
InventorEbbe Kiilerich
Life of this patent
Estimating the term…
Abstract
The present invention relates to a time delay indicator (1) for an injection device for administering a drug into the body of a subject user wherein the time delay indicator is configured for indicating after administration that a dose of the drug actually has been administered and for maintaining this indication until lapse of a pre-determined time interval. The time delay indicator is based on a magnetic liquid (6) being physically moved by a magnet (10).
Claims11
A magnetic time delay indicator providing a visual output for signalling to a user that a predetermined time interval has lapsed, comprising:
- a first compartment and a second compartment connected by an orifice,
- a magnetic liquid provided predominantly inside one of the first compartment or the second compartment and
- a magnet providing a magnetic force moving the magnetic liquid through the orifice from one of the first or the second compartment and into the other of the first or second compartment within a predetermined time interval.
Dependencies are inferred from the claim text.