| 摘要 |
<p>The manually operated dispensing pump has a plunger including a stem reciprocable through a collar of the pump and normally rotatable about the longitudinal axis of the plunger, rotary device on the plunger cooperating with device on the collar for releasably locking the plunger in a fully depressed position upon rotation of the plunger in a predetermined direction. It also comprises a removable tamper evident lock device for holding the plunger against unlocking rotation from its fully depressed locked position. The lock device comprises an arcuate strip partially surrounding the stem and having opposed, spaced apart free ends and a laterally extending pull tab at one of the free ends. The strip has at least one external tooth in engagement with at least one internal toothed provided on an inner surface of the collar. The strip has an internal axial groove receiving an external axial rib provided on the stem.</p> |
