Hydraulic or pneumatic pump to supply liquids has pump housing in elongated form of tube or low-elasticity hose, with plugs at both ends containing no-return valves

摘要

The pump has a housing (1) in the elongated form of a tube or a low-elasticity hose, with a plug (2, 3) in each end, each containing a no-return valve. The two valves both worked in the same direction. The housing contains an elastic hose (17) for displacement. There is a passage aperture (9) in one of the plugs, connected to the supply line.