SAFETY SYRINGE Russian patent published in 2005 - IPC

FIELD: medicinal equipment, in particular, safety syringes.

SUBSTANCE: safety syringe has cylinder with axial through opening, retainer provided within front end of cylinder, piston, needle hub, and needle. Piston positioned for sliding inside cylinder is equipped with sealing rubber member, head and flange disposed on piston in opposed relation to head. Needle hub is detachably engaged with cylinder and is provided with axial opening corresponding to that of cylinder and communicated therewith, and feeding opening adapted for communication with axial openings of needle hub and cylinder and for providing insertion of piston head. Needle has sleeve engaged with front head part of needle hub, and metal pipe engaged with sleeve. Piston has neck portion defined at its front end and arranged so that rubber sealing member tightly adheres thereto, and spatially inclined teeth. Head is made conical. Needle hub has conical front end with protrusions mating with cylinder retaining device upon rotation of cylinder. Slots are provided for engagement with inclined teeth. Bead provided in peripheral portion of feeding opening is mating with piston conical head. Protrusions are released from finger clamps upon rotation, when inclined teeth are engaged with slots.

EFFECT: simplified construction and convenient use.

4 cl, 12 dwg