Definitions for universal joint
Random House Webster's College Dictionary
Mach.a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.
Origin of universal joint:
universal joint, universal(noun)
coupling that connects two rotating shafts allowing freedom of movement in all directions
"in motor vehicles a universal joint allows the driveshaft to move up and down as the vehicle passes over bumps"
A coupling that allows different parts of a machine not in line with each other some freedom of movement at the same time as transmitting rotary motion.
A universal joint, universal coupling, U-joint, Cardan joint, Hardy-Spicer joint, or Hooke's joint is a joint or coupling in a rigid rod that allows the rod to 'bend' in any direction, and is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges located close together, oriented at 90° to each other, connected by a cross shaft.
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