Milk transfer suction hose - has inner hose distorting in cross=section dependent on pressure difference

摘要

The suction hose is for milk-transfer equipment, particularly on a milk-collector vehicle. The free end of the hose is inserted in the milk churn etc and the other end is connected to a suction union. It comprises an outer hose (10) remaining of constant cross-section under pressure differences in service, and containing an inner hose (11) distorting in the transverse direction, and forming the passage (12) through which the milk flows. The inner hose assumes a varying cross-section dependent on the pressure difference between the inside and the outside.