| 摘要 |
486,638. Dental syringes. HAGEMEIER, H. Sept. 7, 1937, No. 24422. [Class 81 (ii)] [Also in Group XXVIII] A syringe, particularly employable for injecting cement into tooth cavities, comprises a screw-threaded plunger rod 17 carrying a nut 19 engaged by a bifurcated lug 16 on a pivoted handle grip 13, operation of which presses forward the plunger 26 through a short stroke to expel a portion of the syringe contents. The nut 19 is returned by a spring 21, whereafter the plunger rod may be fed forward by turning a milled head 23 to set the syringe for a further stroke, the contents thus being extruded in successive steps. The rod 17 rests in a socket 28 in a ball joint 27 on the plunger 26, or may rest against the plunger itself. The grip 13 co-operates with a second grip 14 which may be integral with, or pivoted similarly to grip 13, to, the syringe body. The plunger 26 works in a barrel 10, or in a capsule 24, introduced into the barrel through the end thereof or through lateral openings therein, and secured by a screw-ring 11. A nozzle 12 having a cranked portion is adjustably rotatable in a part 12<1> secured as by screwing to the capsule 24 or the barrel 10. |
