Injection device
AssigneeSanofi
InventorsAnthony Paul Morris, William Marsh, Matthew Jones, Joseph Butler
Life of this patent
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Abstract
A handheld injection device comprising a housing, a piston rod defining a first longitudinal axis and located within the housing, a driver coupled to the piston rod, a dose setting means, which is rotatable about a second longitudinal axis during dose setting, and optionally a power reservoir for driving the driver and/or a release clutch preventing rotation of the driver during dose setting and allowing rotation of the driver during dose dispensing. The first longitudinal axis is spaced from the second longitudinal axis.
Claims21
A handheld injection device comprising:
- a housing;
- a piston rod located within the housing, the piston rod defining a first longitudinal axis and being configured to move along the first longitudinal axis to dispense a dose of a medicament during dose dispensing;
- a driver coupled to the piston rod, wherein the driver comprises a drive sleeve rotatable about a second longitudinal axis during the dose dispensing and coupled to a flat spiral spring, the drive sleeve being configured to be rotationally restrained to the housing during dose setting;
- and
- a dose setting mechanism comprising a user operable portion positioned at least partially outside of the housing and protruding in a proximal direction from a proximal end of the housing, the user operable portion rotatable about the second longitudinal axis during the dose setting and axially movable along the second longitudinal axis to initiate the dose dispensing, the second longitudinal axis being spaced apart from and parallel to the first longitudinal axis.
A dose dispensing and setting mechanism for an injection device, the dose dispensing and setting mechanism comprising:
- a piston rod defining a first longitudinal axis, the piston rod being configured to move along the first longitudinal axis to dispense a dose of a medicament during dose dispensing;
- a driver coupled to the piston rod, wherein the driver comprises a drive sleeve rotatable about a second longitudinal axis during the dose dispensing and coupled to a flat spiral spring, the drive sleeve being configured to be rotationally restrained to a housing of the injection device during dose setting;
- and a dose setting mechanism comprising a user operable portion positionable at least partially outside of the housing of the injection device and protruding in a proximal direction from a proximal end of the housing of the injection device, the user operable portion rotatable about the second longitudinal axis during the dose setting and axially movable along the second longitudinal axis to initiate the dose dispensing, wherein the first longitudinal axis is spaced apart from and parallel to the second longitudinal axis.
A handheld injection device comprising:
- a housing;
- a piston rod located within the housing, the piston rod defining a first longitudinal axis and being configured to move along the first longitudinal axis to dispense a dose of a medicament during dose dispensing;
- a driver coupled to the piston rod;
- and
- a dose setting mechanism comprises a dial assembly and a dial sleeve, the dial assembly and the dial sleeve being rotatable about a second longitudinal axis, the second longitudinal axis being spaced apart from and parallel to the first longitudinal axis,
- wherein the dial sleeve is configured to be decoupled from the driver during dose setting and to be coupled to the driver during the dose dispensing,
- wherein the dial assembly comprises a user operable portion positioned at least partially outside of the housing and protruding in a proximal direction from a proximal end of the housing, and
- wherein the user operable portion is rotatable about the second longitudinal axis during the dose setting and axially movable along the second longitudinal axis to initiate the dose dispensing.
Dependencies are inferred from the claim text.