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ball-and-socket joint |
Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Wikipedia, Hutchinson | 0.02 sec. |
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ball-and-socket joint, in engineering, mechanical connection used between parts that must be allowed some relative angular motion in nearly all directions. As the name implies, the joint consists essentially of a spherical knob at the end of a shaft, with the knob fitting securely into a mating socket. Like other mechanical joints, a ball-and-socket joint must have some provision for lubrication and is normally provided with a seal to prevent loss of the lubricant. Joints of this type are commonly used in mounting the front wheels of automobiles, allowing these wheels movement sufficient for steering. In this application they are usually called ball joints. |
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? Mentioned in | ? References in periodicals archive | |
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| She was taught to view the knee as a single-plane hinge joint and not a ball-and-socket joint. But with the computer model, they discovered that the animal's head, which swiveled on a huge ball-and-socket joint that Chapman likens to a "big, bony trailer hitch," was remarkably well balanced. Walk your feet away from the wall, bending from the ball-and-socket joint of your hips, until your hips are above your ankles and your spine is parallel to the floor. |
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