swash plate

noun Machinery.
an inclined circular plate on a rotating shaft for transferring force and motion to or from parts reciprocating in a direction parallel to the axis of shaft rotation.
Also, swashplate.
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World English Dictionary
swash plate
 
n
engineering Also called: wobble plate a collar or face plate on a shaft that is inclined at an oblique angle to the axis of rotation and either imparts reciprocating motion to push rods parallel to the shaft axis as in a swash plate pump or, conversely, converts reciprocating motion to rotation as in a swash plate motor
 
[from swash (obsolete n) an oblique figure or ornament, from aswash: see swash letter]

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Example sentences
The tilt-cam mechanism controls blade cyclic pitch amplitudes in a manner similar to a helicopter swash plate.
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