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"A device for raising liquids or removing gas from a closed vessel." Foster, 1921. The image shows two types of pumps and their mechanisms: Fig. 1; a. barrel, b. piston, c. valve, d. reservoirs. Fig. 2; a. barrel, b. piston, c. valve in barrel, d. valve in stand pipe, e. reservoir, f. air chamber.

Pump

"A device for raising liquids or removing gas from a closed vessel." Foster, 1921. The image shows two…

A force pump differs from a lifting pump for many reasons, with the main reason being that the force pump has no valves and the pistons are solid. The images are sections of suction and force pumps respectively.

Force Pump

A force pump differs from a lifting pump for many reasons, with the main reason being that the force…

A section of a suction pump. If the piston in the pump were to be lowered, the water level would also lower, and the water would no longer leave pipe A.

Suction Pump

A section of a suction pump. If the piston in the pump were to be lowered, the water level would also…