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US 10,376,651 B2Granted
Injection device
AssigneeSanofi
InventorAnthony Paul Morris
Life of this patent
Estimating the term…
Abstract
The invention refers to a handheld injection device comprising a housing (10, 20, 30), a piston rod (60), defining a first longitudinal axis (I) and located within the housing (10), a driver (70, 80, 90) coupled to the piston rod (60), a dose setting means (40), which is rotatable during dose setting, a power reservoir (100) for driving the driver (70, 80, 90), and a number wheel (130) for displaying a dose set by the dose setting means (40).
Claims18
A handheld spring-driven injection device comprising:
- a housing;
- a piston rod defining a first longitudinal axis, the piston rod being located within the housing;
- a driver coupled to the piston rod;
- a dose setting assembly which is rotatable during dose setting;
- a power reservoir for driving the driver, wherein the power reservoir is a motor spring of the handheld spring-driven injection device, the motor spring being dimensioned such that the motor spring can drive the piston rod from a retracted position into a distal position;
- and
- a number wheel for displaying a dose set by the dose setting assembly,
- wherein the dose setting assembly comprises a dial grip, which comprises a threaded section having an end stop, and wherein the housing comprises a splined section, with a last dose nut being interposed between and engaging the threaded section of the dial grip and the splined section of the housing,
- wherein the motor spring has a first end attached to a first spool, which is located on the first longitudinal axis, and a second end attached to a second spool, which is located on a second longitudinal axis, with one of the first and second spools being coupled to the driver.
6 more elements
A handheld spring-driven injection device comprising:
- a housing;
- a piston rod defining a first longitudinal axis, the piston being located within the housing;
- a driver coupled to the piston rod;
- a dose setting assembly which is rotatable during dose setting;
- a power reservoir for driving the driver, wherein the power reservoir is a motor spring of the handheld spring-driven injection device, the motor spring being dimensioned such that the motor spring can drive the piston rod from a retracted position into a distal position;
- and
- a number wheel for displaying a dose set by the dose setting assembly,
- wherein the dose setting assembly comprises a dispense button, which comprises a threaded section having an end stop, and wherein the housing comprises a splined section, with a last dose nut being interposed between and engaging the threaded section of the dispense button and the splined section of the housing,
- wherein the motor spring has a first end attached to a first spool, which is located on the first longitudinal axis, and a second end attached to a second spool, which is located on a second longitudinal axis, with one of the first and second spools being coupled to the driver.
6 more elements
Dependencies are inferred from the claim text.