MACHINE VOOR HET VERPLAATSEN VAN EEN MEDIUM, ZOALS EEN COMPRESSOR, EEN POMP OF EEN EXPANSIEMACHINE.

摘要

The invention relates to machines such as compressors or pumps of the kind including an hourglass worm meshing with a toothed pinion. It is known to make the pinion of metal coated with a resilient material such as plastic rigidity fixed to the surface of the metallic pinion. According to the invention the metal pinion is covered with a plastic lining having teeth which engage the threads of the worm and prevent the metal teeth of the pinion from engaging those threads. The plastic lining is permitted a slight shifting about its average position respectively to the metal pinion.