DEVICE FOR INTRODUCING FLUID PRODUCT Russian patent published in 2006 - IPC A61M5/315 A61M5/50 

FIELD: medical engineering.

SUBSTANCE: device has casing, piston, piston rod, the first and the second locking means. The casing has reservoir containing the product. The piston is arranged in the reservoir in a way that it is movable in product feeding direction to enable one to give out the product. Piston rod acts upon the piston in product feeding direction and forms the first locking means. The second locking means is not movable against the feeding direction relative to the casing. A row of locking members formed by the first locking members arranged in series and continuing in the feeding direction makes one of the locking means. The second locking member forms another locking means. It comes in engagement with a row of locking members in a way that it introduced into the space between the locking members belonging to said row of locking members. The second locking member is withdrawn from engagement by moving the piston rod in feeding direction against elastic force. However, when introduced into engagement, it counteracts to piston rod movement against feeding direction with resistance force exceeding the elastic force for preventing the piston rod movement against feeding direction. The first locking means forms locking action-freezing member on the frontal end with respect to feeding direction, and/or the second locking means on the back end with respect to the feeding direction. The locking action-freezing member counteracts piston rod movement against the feeding direction exerting locking force exceeding resistance force.

EFFECT: excluded possibility of piston rod manipulations.

15 cl, 5 dwg