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This air pump contains a glass or metal cylinder called the barrel, in which a piston works. The piston has an opening through it which is closed at the lower end by a valve S opening upwards. The barrel communicates with a passage leading to the centre of a brass surface

Air Pump

This air pump contains a glass or metal cylinder called the barrel, in which a piston works. The piston…

Sprengel's Air-pump is a glass tube longer than a barometer tube, down which mercury is allowed to fall from the funnel.

Air Pump

Sprengel's Air-pump is a glass tube longer than a barometer tube, down which mercury is allowed to fall…

This apparatus represents the single barrel of the double-acting pump of Bianchi.

Air-pump

This apparatus represents the single barrel of the double-acting pump of Bianchi.

A pump is a device used to move fluids, such as liquids or slurries, or gases. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure; they only displace fluid, causing a flow. Adding resistance to flow causes pressure. Pumps fall into five major groups: direct lift, displacement, velocity, buoyancy and gravity pumps, and their names describe the method for moving a fluid.

Mechanical Action Air Pump

A pump is a device used to move fluids, such as liquids or slurries, or gases. A pump displaces a volume…

A machine, variously constructed, for exhausting the air from a closed vessel.

Air-pump

A machine, variously constructed, for exhausting the air from a closed vessel.

A general view of the air-pump apparatus formed by Bianchi.

Bianchi's Air-pump

A general view of the air-pump apparatus formed by Bianchi.

An air pump, which removes air from an enclosed space. R is the receiver and space that it encloses is what it removes the air from. This particular model is a bell jar receiver. C is a pump cylinder, t is a bent tube connecting the two together, V and V' are valves.

Pneumatic Devices

An air pump, which removes air from an enclosed space. R is the receiver and space that it encloses…

The hot air pumping engine is a technology that uses high amplitude sound waves in a pressurized gas to pump heat from one place to another, or uses a heat temperature difference to induce sound which can be converted to electricity with high efficiency.

Hot Air Pumping Engine

The hot air pumping engine is a technology that uses high amplitude sound waves in a pressurized gas…

"A pump for exhausting air and other gases from a closed space, or for compressing air within an enclosed space." -Foster, 1921

Air Pump

"A pump for exhausting air and other gases from a closed space, or for compressing air within an enclosed…

A pump for compressing, removing, or forcing a flow of air.

Air Pump

A pump for compressing, removing, or forcing a flow of air.

A manual air pump. R is the receiver. The space that the receiver encloses is what it removes the air from.

Air Pump

A manual air pump. R is the receiver. The space that the receiver encloses is what it removes the air…