| 摘要 |
<p>A device for enabling automatic hypodermic injections by means of a fluid pressure comprises a body 6 with a seat 61 for receiving a hypodermic syringe S. A first fluid pressure cylinder 4 is movable with respect to said body 6 and has a plunger 3 in engagement with the syringe piston. A pair of second fluid pressure cylinders stationary with respect to the body 6 have their plungers 5 fastened to the fluid pressure cylinder 4 so that they are adapted to move the syringe cylinder. Return springs 8 are associated with the plungers 5 for returning the plungers 5 to their starting position. Valve means are provided for controlling the admission of the pressure to the fluid pressure cylinders 4 and 10 and the release of the pressure therefrom. Coupling and control means are provided for connecting the body to a pressure source and controlling the pressure of the source, respectively. <IMAGE></p> |
