AUTO-INJECTOR
First Claim
1. A cassette unit for use with an auto-injector having an electrically powered drive unit, said cassette unit comprising:
- a cassette unit housing defining a cassette unit housing cavity and a needle projection aperture;
said cassette unit housing cavity in receipt of a syringe comprising;
a barrel for containing a volume of a liquid drug formulation, said barrel defining a flange at the rear end thereof and a forward shoulder at the forward end thereof;
a hollow needle at a front end of said barrel, said hollow needle defining a needle tip for dispensing of said liquid drug formulation; and
a plunger that is axially movable within the barrel; and
in contact with said plunger and axially movable within the barrel, a plunger slaving part arranged such that when a drive load is applied to a rear drive-receiving face thereof the drive load is evenly transmitted to the plunger.
3 Assignments
0 Petitions
Accused Products
Abstract
Provided is a cassette unit suitable for use with an auto-injector having an electrically powered drive unit. The cassette unit has a housing defining a cassette unit housing cavity and a needle projection aperture. The cassette unit housing cavity is arranged for receipt of a syringe. The syringe has a barrel for containing a volume of a liquid drug formulation, the barrel defining a flange at the rear end thereof and a forward shoulder at the forward end thereof; a hollow needle at a front end of the barrel, the hollow needle defining a needle tip; and a plunger that is axially movable within the barrel. The cassette unit includes, in contact with the plunger and axially movable within the barrel, a plunger slaving part arranged such that when a drive load is applied to a rear drive-receiving face thereof the drive load is evenly transmitted to the plunger.
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Citations
44 Claims
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1. A cassette unit for use with an auto-injector having an electrically powered drive unit, said cassette unit comprising:
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a cassette unit housing defining a cassette unit housing cavity and a needle projection aperture; said cassette unit housing cavity in receipt of a syringe comprising; a barrel for containing a volume of a liquid drug formulation, said barrel defining a flange at the rear end thereof and a forward shoulder at the forward end thereof; a hollow needle at a front end of said barrel, said hollow needle defining a needle tip for dispensing of said liquid drug formulation; and a plunger that is axially movable within the barrel; and in contact with said plunger and axially movable within the barrel, a plunger slaving part arranged such that when a drive load is applied to a rear drive-receiving face thereof the drive load is evenly transmitted to the plunger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 34, 38)
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27-33. -33. (canceled)
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35-37. -37. (canceled)
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39-42. -42. (canceled)
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43. A cassette unit comprising:
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a housing defining a cavity, said cavity arranged to receive a syringe comprising; a barrel; a needle at a front end of said barrel; and a plunger that is axially movable within the barrel; and a plunger slaving part axially movable within said barrel, the plunger slaving part arranged such that when a drive load is applied to a rear drive-receiving face thereof the drive load is evenly transmitted to the plunger.
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44-50. -50. (canceled)
Specification