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  2. Hand pump - Wikipedia

    en.wikipedia.org/wiki/Hand_pump

    As the rotor is turned, the voids in the stator are screwed upwards along the axis of rotation. Progressive cavity pumps can have complicated gearing mechanisms and are difficult for local pump technicians to maintain and repair. A rope and washer pump is a type of progressive cavity hand pump.

  3. Telescopic cylinder - Wikipedia

    en.wikipedia.org/wiki/Telescopic_cylinder

    Telescopic cylinders must only be used in machinery as a device for providing force and travel. Side forces and moment loads must be minimized. Telescopic cylinders should not be used to stabilize a structural component. [4] Hydraulic telescopic cylinders are often limited to a maximum hydraulic pressure of 2000-3000 psi.

  4. Piston pump - Wikipedia

    en.wikipedia.org/wiki/Piston_pump

    Piston pump compared to a plunger pump. A piston pump is a type of positive displacement pump where the high-pressure seal reciprocates with the piston. [1] Piston pumps can be used to move liquids or compress gases. They can operate over a wide range of pressures. High pressure operation can be achieved without adversely affecting flow rate.

  5. Diaphragm pump - Wikipedia

    en.wikipedia.org/wiki/Diaphragm_pump

    The basic working principle of an air-operated double diaphragm pump. Cross-section sketch of diaphragm fuel pump Air-operated double diaphragm pump. A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm (check valve ...

  6. Glossary of oilfield jargon - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_oilfield_jargon

    Pressure core sampler: A tool designed to retrieve a sediment core sample while retaining the pressure at depth. [5] Pull past Martin-Decker: Exert extreme tension on stuck pipe, so much so that the pointer needle revolves off-scale beyond the logo of a popular manufacturer of weight indicators, Martin-Decker. [6]

  7. Telescoping (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Telescoping_(mechanics)

    Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state. [1] In modern equipment this can be achieved by a hydraulics , but pulleys are generally used for simpler designs such as extendable ladders and amateur ...

  8. Whip antenna - Wikipedia

    en.wikipedia.org/wiki/Whip_antenna

    The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna's axis), with the radiated power falling off with elevation angle to zero on the antenna's axis. [1]

  9. Air pump - Wikipedia

    en.wikipedia.org/wiki/Air_pump

    Boyle's air pump. An air pump is a pump for pushing air. Examples include a bicycle pump, pumps that are used to aerate an aquarium or a pond via an airstone; a gas compressor used to power a pneumatic tool, air horn or pipe organ; a bellows used to encourage a fire; a vacuum cleaner and a vacuum pump. All air pumps contain a part that moves ...

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