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A universal joint (also called a universal coupling or U-joint) is a joint or coupling connecting rigid shafts whose axes are inclined to each other. It is commonly used in shafts that transmit rotary motion .
Also, although universal joints are simple to produce and can withstand large forces, universal joints often become "notchy" and difficult to rotate as the angle of operation increases. The first type of constant-velocity joint was the Double Hooke's (Double Cardan) Joint which was invented by Robert Hooke in the 17th century. This design uses ...
During the design exercise, Spicer developed the design of a universal joint that was practical for automotive use. With the encouragement of his instructor, Dean Robert H. Thurston, Spicer applied for and received a patent for a practical automotive universal joint on May 19, 1903. Thurston died on October 25, 1903, and without a mentor ...
A prismatic joint can be formed with a polygonal cross-section to resist rotation. The relative position of two bodies connected by a prismatic joint is defined by the amount of linear slide of one relative to the other one. This one parameter movement identifies this joint as a one degree of freedom kinematic pair. [2]
MSM is usually used to treat osteoarthritis, a joint disease that impacts cartilage (a.k.a. the tissue that covers the ends of bones in your joints), according to the U.S. National Library of ...
Joints that connect bodies in this system remove degrees of freedom and reduce mobility. Specifically, hinges and sliders each impose five constraints and therefore remove five degrees of freedom. It is convenient to define the number of constraints c that a joint imposes in terms of the joint's freedom f, where c = 6 − f.
This observation is the basis of the I-beam cross-section; the neutral axis runs along the center of the web which can be relatively thin and most of the material can be concentrated in the flanges. The ideal beam is the one with the least cross-sectional area (and hence requiring the least material) needed to achieve a given section modulus.
Cross-joints – Joints which are approximately perpendicular to fold axes. Diagonal joints – Joints which typically occur as conjugate joint sets that trend oblique to the fold axes. Strike joints – Joints which trend parallel to the strike of the axial plane of a fold. Cross-strike joints – Joints which cut across the axial plane of a ...