A diver's pump is a kind of pneumatic mechanism

Pneumatics

Pneumatics is a branch of technology, which deals with the study and application of use of pressurized gas to effect mechanical motion.Pneumatic systems are extensively used in industry, where factories are commonly plumbed with compressed air or compressed inert gases...

 used to provide divers in standard diving dress

Standard diving dress

A standard diving dress consists of a metallic diving helmet, an airline or hose from a surface supplied diving air pump, a canvas diving suit, diving knife and boots...

 with air while they are underwater.

Rotary

Rotary pumps are primary based on crankshaft

Crankshaft

The crankshaft, sometimes casually abbreviated to crank, is the part of an engine which translates reciprocating linear piston motion into rotation...

 that is moved by rotating of two flywheel

Flywheel

A flywheel is a rotating mechanical device that is used to store rotational energy. Flywheels have a significant moment of inertia, and thus resist changes in rotational speed. The amount of energy stored in a flywheel is proportional to the square of its rotational speed...

s attached to it, and situaded on the sides of the pump. Rotary pumps can be built on two and three cylinder

Pneumatic cylinder

Pneumatic cylinders are mechanical devices which utilize the power of compressed gas to produce a force in a reciprocating linear motion....

s Rotary pumps might be operated by at least two man. Piston

Piston

A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from...

s attached to the crankshaft pushes in air through the air valves

Valve

A valve is a device that regulates, directs or controls the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but are usually discussed as a separate category...

 and then through the outlet to an air hose

Air hose

Air hoses are used in underwater diving, such as scuba diving, to carry air from the surface or from air tanks or diving pumps to the diver. Air hoses are therefore a necessary part of standard diving dress and any type of surface supplied diving equipment....

 and at last to the diving dress

Standard diving dress

A standard diving dress consists of a metallic diving helmet, an airline or hose from a surface supplied diving air pump, a canvas diving suit, diving knife and boots...

 of a diver

Surface supplied diving

Surface supplied diving refers to divers using equipment supplied with breathing gas using a diver's umbilical from the surface, either from the shore or from a diving support vessel sometimes indirectly via a diving bell...

. Cylinders, air valves and outlet for air are made from brass

Brass

Brass is an alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties.In comparison, bronze is principally an alloy of copper and tin...

for the most reliability.

Lever

Lever pumps are primary based on two cylinders, and operated by lifting up and down a heavy beam, with handles attached to its side, and pistons attached to it in the middle. Pistons pulls the air in cylinders through the air valves, and then through air hose to the diving dress of the diver. Cylinders, valves and outlet for air are made from brass for the most reliability.

External links

• All about pumps in worlds largest virtual diving museum: Diving Heritage