INJECTION DEVICE WITH SIMPLIFIED STOPPER RETENTION
First Claim
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1. An injection device comprising:
- a volume for accommodating a product for administration, a piston for acting upon the product within the volume, and a stopper disposed between an end of the piston facing the product and the product within the volume, wherein the piston comprises a piston head for sealing in a gas-tight manner, and wherein the piston head is separate from the stopper such that a negative pressure or vacuum region can be developed between the piston head and the stopper.
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Abstract
An injection device including a volume for accommodating a product for administration, a piston for acting upon the product within the volume, and a stopper which can be arranged between an end of the piston facing the product and the product within the volume, wherein the piston includes a piston head configured to be sealed in a gas-tight manner, the piston head being separate from the stopper such that a negative pressure or vacuum region can be developed between the piston head and the stopper.
30 Citations
14 Claims
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1. An injection device comprising:
- a volume for accommodating a product for administration, a piston for acting upon the product within the volume, and a stopper disposed between an end of the piston facing the product and the product within the volume, wherein the piston comprises a piston head for sealing in a gas-tight manner, and wherein the piston head is separate from the stopper such that a negative pressure or vacuum region can be developed between the piston head and the stopper.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification