Patent ID: 6033387
Filing Date: 2000-03-07
Classification: A61M

Abstract:
An injection device of the pre-filled type comprising an injection needle (116; 15; 23; 47) wherein it comprises in combination:a tubular syringe body (101; 121; 1; 20; 42) made of a deformable plastics material, equipped towards one of its ends, called the rear end, with finger-hold elements (105; 5; 26; 53) and towards its other end, called the front end, with an external locking element (104; 123; 7-9; 27-29; 54-56) suitable for deforming radially between a retracted position and a dilated position,a tubular sheath (109; 10; 31; 58) of internal cross-section suitable for being able to slide along the syringe body (101; 121; 1; 20; 42), equipped with an internal locking element (110, 111; 11; 32; 59) paired with that of the said syringe body in the dilated position of this latter, arranged towards one of its ends, called the rear end, the said sheath being suitable for being able to slide between two positions:a rear, injection, position in which the rear end of the sheath (109; 10; 31; 58) rests adjacent to the finger-hold elements (105; 5; 26; 53) of the syringe body (101; 121; 1; 20; 42) on the one hand, and at least the front end of the syringe body is disengaged on the other hand,a front, post-use protection, position in which the respective locking elements (104, 110, 111; 123, 110, 111; 7-9, 11; 27-29, 32; 54-56, 59) of the sheath (109; 10; 31; 58) and of the syringe body (101; 121; 1; 20; 42) are in a state of cooperation on the one hand, and the sheath covers the front end of the syringe body and extends in the extension thereof on the other hand,a rigid pre-filled container (114; 13; 34; 61) introduced into the interior of the syringe body (101; 121; 1; 20; 42) and of external cross-section paired with the internal cross-section of the said syringe body,and means (106; 6; 30; 57) for the relative locking in translation of the rigid container and the syringe body.