Dermally affixed injection device
First Claim
1. An injection device for introducing an injection fluid into a patient through the patient'"'"'s skin, which comprises:
- (a) a casing having an adhesive contact surface for contacting the patient'"'"'s skin and adhering the casing to the patient'"'"'s skin;
(b) a cannula fixedly positioned relative to the casing, the cannula having a tip configured and dimensioned for piercing the patient'"'"'s skin and introducing the injection fluid into a patient, the tip projecting beyond the contact surface of the casing toward the patient'"'"'s skin;
(c) a protective element movable from a first position to a second position, the first position being such that the protective element extends beyond the tip of the cannula thereby shielding the tip of the cannula from the patient'"'"'s skin and the second position being such that the protective element is retracted into the casing thereby exposing the tip of the cannula to the patient'"'"'s skin; and
(d) a drive means for moving the protective element from the first position to the second position.
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Accused Products
Abstract
An improved injection device has a casing containing an active substance reservoir, a cannula communicating with the reservoir, a device for inserting the cannula, and pump means for discharging the reservoir contents through the cannula. The cannula 11 is fixed relative to the casing and projects beyond the underside of the casing to the depth required for injection. The cannula is surrounded by a protective element which is moved by a spring drive from a first end position in which the protective device projects beyond the underside of the casing and beyond the cannula to a second end position in which the protective device does not project beyond the underside of the casing.
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Citations
15 Claims
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1. An injection device for introducing an injection fluid into a patient through the patient'"'"'s skin, which comprises:
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(a) a casing having an adhesive contact surface for contacting the patient'"'"'s skin and adhering the casing to the patient'"'"'s skin; (b) a cannula fixedly positioned relative to the casing, the cannula having a tip configured and dimensioned for piercing the patient'"'"'s skin and introducing the injection fluid into a patient, the tip projecting beyond the contact surface of the casing toward the patient'"'"'s skin; (c) a protective element movable from a first position to a second position, the first position being such that the protective element extends beyond the tip of the cannula thereby shielding the tip of the cannula from the patient'"'"'s skin and the second position being such that the protective element is retracted into the casing thereby exposing the tip of the cannula to the patient'"'"'s skin; and (d) a drive means for moving the protective element from the first position to the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification