| 摘要 |
1528735 Hypodermic injection syringes PHILIPS GLOEILAMPENFABRIEKEN NV 11 May 1977 [14 May 1976] 19768/77 Heading A5R A hypodermic injection syringe comprises a gun assembly 200, Figure 1, having a sleeve 101, a plunger 162, Figure 2, and a spring 138 and an ampoule holder 104 including an ampoule 135 defined by a sleeve 136 closed at one end by a piston 148 and by a needle assembly 81 at the other end, the piston 148 being connected to the plunger 162 by a spacer member 300. The gun assembly and ampoule holder are held by an outer sleeve 100. Spring 138 is held in compressed state by projections 176 of the plunger passing through an aperture at the rear end of sleeve 101 and locking by means of a pin 144 fastened to a safety cap 142. The device is actuated by removal of the safety cap and radially inward pressure on projections 176. A resilient sheath 250 covers the needle until it is pushed to its injecting position by spring 138. |
