Auto-pen for a two-chamber ampoule
First Claim
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1. An injection device for use with a two-chamber ampoule, comprising:
- a) a front casing part with which the two-chamber ampoule can be associated;
b) a rear casing part;
c) a threaded drive which is associated with the rear casing part; and
d) a piston rod which, during a blending movement, is moved by the threaded drive toward the dispensing end of the device and slaves at least a closing piston of the two-chamber ampoule, wherein a spring element presses the piston rod toward the dispensing end during a delivery movement.
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Abstract
An injection device for use with a two-chamber ampoule, wherein the device includes a front casing part with which the two-chamber ampoule can be associated, a rear casing part, a threaded drive accommodated by the rear casing part, a piston rod which, during a blending movement, is moved by the threaded drive toward a dispensing end of the device and slaves at least a closing piston of the two-chamber ampoule in the process, wherein a spring element presses the piston rod toward the dispensing end during a delivery movement.
145 Citations
18 Claims
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1. An injection device for use with a two-chamber ampoule, comprising:
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a) a front casing part with which the two-chamber ampoule can be associated;
b) a rear casing part;
c) a threaded drive which is associated with the rear casing part; and
d) a piston rod which, during a blending movement, is moved by the threaded drive toward the dispensing end of the device and slaves at least a closing piston of the two-chamber ampoule, wherein a spring element presses the piston rod toward the dispensing end during a delivery movement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification