Tom blok Photo collection by Th.Schiöler Spiral scoops, screws and the chain pump The "liberation" pump in China Photo 158
The "liberation" pump in China
Gul streg
Photo 511 x 506 pixels, 43,6 K
 
Close-up of the liberation pump
The crucial point in this construction is the piston plungers. They are fastened at intervals on to an endless chain, which passes through a vertical tube. The construction is factory-made and has a high degree of reliability.
[158]