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2. Reciprocating compressor - Wikipedia

   en.wikipedia.org/wiki/Reciprocating_compressor

   A reciprocating compressor or piston compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. [1] [2] Pressures of up to 5,000 psig are commonly produced by multistage reciprocating compressors.

3. Piston ring - Wikipedia

   en.wikipedia.org/wiki/Piston_ring

   Two piston rings mounted on a two-stroke engine piston. The ring gap for the bottom ring is visible in the centre of the image. A piston ring is a metallic split ring that is attached to the outer diameter of a piston in an internal combustion engine or steam engine. The main functions of piston rings in engines are:

4. Piston motion equations - Wikipedia

   en.wikipedia.org/wiki/Piston_motion_equations

   Note that for the automotive/hotrod use-case the most convenient (used by enthusiasts) unit of length for the piston-rod-crank geometry is the inch, with typical dimensions being 6" (inch) rod length and 2" (inch) crank radius. This article uses units of inch (") for position, velocity and acceleration, as shown in the graphs above.

5. Compressor - Wikipedia

   en.wikipedia.org/wiki/Compressor

   Rolling piston compressor. The Rolling piston in a rolling piston style compressor plays the part of a partition between the vane and the rotor. [13] Rolling piston forces gas against a stationary vane. 2 of these compressors can be mounted on the same shaft to increase capacity and reduce vibration and noise. [14]

6. Diaphragm compressor - Wikipedia

   en.wikipedia.org/wiki/Diaphragm_compressor

   A diaphragm compressor is a variant of the classic reciprocating compressor with backup and piston rings and rod seal. The compression of gas occurs by means of a flexible membrane, instead of an intake element. The back and forth moving membrane is driven by a rod and a crankshaft mechanism.

7. Axial piston pump - Wikipedia

   en.wikipedia.org/wiki/Axial_piston_pump

   Cutaway side-view diagram of an axial piston pump 3-D rendering of an axial piston pump with the parts labeled Animation of an axial piston pump in operation. An axial piston pump has a number of pistons (usually an odd number) arranged in a circular array within a housing which is commonly referred to as a cylinder block, rotor or barrel.