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US 4,908,020 AGranted
Self-destructive non-reusable injection syringe
AssigneeI.D. International A/S
InventorTor-Erling Pettersen
Life of this patent
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AssigneeI.D. International A/S
InventorTor-Erling Pettersen
Estimating the term…
Self-destructive non-reusable injection syringes consisting of a cylinder 1 which has a needle 2 at one end. In the cylinder a plunger head 3 with a plunger shaft 4 is placed, and in connection with the plunger head 3 or the plunger shaft 4, a release mechanism 6 is made which is released after the first use of the syringe. The release mechanism 6 consists of pieces 10, 11, 12 with at least one steering knob 13 which runs along the syringe's axial sloping path or course 14 in another body 15. The path or course 14 is at one end joined to an axially running path 16 which is open at the end 17 of the body 15. A stopper 17 for the steering knob 13 is placed at the end of the path opposite the connection with the path 16. A freely revolving joint 7, e.g., a sphere, which moves freely in a socket is connected to the plunger shaft 4 or between the plunger shaft 4 and the plunger head 3.
A self-destructive non-reusable syringe comprising a cylinder with a needle in one end and a plunger head positioned to slide within the cylinder and connected to a plunger shaft by a release mechanism comprising a steering knob carrier rotatably attached to the plunger shaft and having at least one steering knob which runs in a track along the exterior of a protrusion from the plunger head, which track comprises first and second sections, each of which sections is of approximately equal width, the first of which sections runs toward the plunger head along an angle relative to the longitudinal axis of the syringe and the second of which sections runs away from the plunger head substantially along the longitudinal axis of the syringe to an opening, for allowing the plunger head to be drawn from an initial position first away from the needle and then toward the needle and ultimately disengaging the plunger shaft from the plunger head if the plunger shaft is drawn away from the needle for a second time.
A self-destructive non-reusable syringe comprising:
A self-destructive non-reusable syringe comprising a cylinder with a needle in one end and a plunger head positioned to slide within the cylinder and connected to a plunger shaft by a release mechanism comprising a steering knob carrier rotatably attached to the plunger shaft and having at least one steering knob which runs in a track in a protrusion from the plunger head, which track comprises first and second sections, the first of which runs toward the plunger head along an angle relative to the longitudinal axis of the syringe and the second section of which is deeper than the first section and runs away from the plunger head substantially along the longitudinal axis of the syringe to an opening, for allowing the plunger head to be drawn from an initial position first away from the needle and then toward the needle and ultimately disengaging the plunger shaft from the plunger head if the plunger shaft is drawn away from the needle for a second time.
Dependencies are inferred from the claim text.