| 摘要 |
<p>The distributor and doser for viscous products has a rigid container (2) and a sliding piston (20) for repeated use to expel material. There is an internal rack along all of the container and it can move between two positions. The piston has at its centre a lip (27a) at the side of the rack (18) passage which seals between piston and rack. The inner hole of the lip is such that the rack goes through the piston, sealed but with limited friction. A pawl mechanism has a flexible lug (24) sloping towards the rack to engage its teeth.</p> |
