Patent ID: 9545464
Date: 2017-01-17
CPC Classifications: A61M

Claim:
1. A syringe ( 10 ) including: a syringe body ( a plunger ( the first stop ( 32 ) and the protruding teeth ( 122 A) being shaped and constituted so as, during the upward movement of the plunger ( 100 ) in the syringe body ( 20 ) from a low position where the plunger head ( 110 ) is near the lower end ( 20 A) of the syringe body ( 20 ) to a high position where the plunger head ( 110 ) is near the upper end ( 20 B) of the syringe body ( 20 ), when the first stop ( 32 ) and the first rack ( 122 ) are opposite to each other, to allow a tooth-by-tooth upward movement of the plunger ( 100 ) along the syringe body ( 20 ), the syringe ( 10 ) being characterized in that the first stop ( 32 ) and the protruding teeth ( 122 A) are also shaped and constituted so as to prevent any downward movement of the plunger ( 100 ) under the effect of a push on the operating rod ( 120 ), but to disengage the first rack ( 122 ) by rotation of the plunger ( 100 ) in the syringe body ( 20 ) about the longitudinal axis (A 1 ) to bring the first rack ( 122 ) opposite the first blank surface ( 22 ) of the inner wall ( 21 ) of the syringe body ( 20 ), wherein the plunger head ( 110 ) includes: a terminal part ( a base ( the first notch ( 112 ) and the first longitudinal groove ( 115 ) of the base ( 111 ) being shaped and constituted so as to allow the upward movement and the holding of the plunger ( 100 ) in the high position when the first notch ( 112 ) is opposite the first stop ( 32 ), and to prevent any downward movement of the plunger ( 100 ) along the syringe body ( 20 ), but to disengage the plunger head ( 110 ) by rotation of the plunger ( 100 ) in the syringe body ( 20 ) about the longitudinal axis (A 1 ) to bring the first longitudinal groove ( 115 ) opposite the first stop ( 32 ).