| 摘要 |
The pump has the cylinders secured on a common plate and the hopper is provided with a flat closure plate with an orifice. A transport tube is arranged centrally in the orifice and extends to the cylinder plate. The two plates are arranged at a distance from one another thus forming an intermediate space extending over the full opening range of the hopper, this space being bounded by the resilient seal. The seal preferably consists of a resilient tube capable of passing lubricant and provided with outlet orifices directed towards the cylinder plate. |
