SLIDE VALVE FOR SYRINGES, AND PLUNGER FOR SLIDE VALVE-EQUIPPED SYRINGES

摘要

A substantially columnar slide valve for syringes, wherein one of the two parts, an annular lip contacting the inner wall surface of an injection barrel to water-tightly divide spaces before and after the slide valve and a holder contacting the inner wall surface of the injection barrel to control the substantially columnar stem of the slide valve so that the stem coincides with the axis of the injection barrel, the annular lip or holder at the head in the direction of travel of the slide valve during injection is installed at some distance away from the end of the substantially columnar slide valve, the slide valve enabling smooth injecting operation .