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Two variants with wheels were both awarded US patents in May 1957, [2] [3] and the first non-wheeled design that was called a "walker" was patented in 1965 by Elmer F. Ries of Cincinnati, Ohio. [4] The first walker to resemble modern walkers was patented in 1970 by Alfred A. Smith of Van Nuys, California. [ 5 ]
Wheel studs are the bolts that are on your mounting hub and are used along with lug nuts to attach the wheel to the car. The bolt hole circle is the circle that the center of each bolt aligns with. The second number in a bolt pattern is the diameter of this circle. [ 2 ]
Beyond 4.5, there is sometimes used a 5-point player classification for abled bodied athletes. [6] The 5-point player is not recognized by wheelchair basketball's governing body. [ 5 ] There has been a push by the National Wheelchair Basketball Association to allow for able-bodied athletes to compete in wheelchair basketball games.
Wheelchair fencing is governed by IWAS Wheelchair Fencing (IWF). [23] The International Paralympic Committee manages classification for a number of spinal cord injury and wheelchair sports including alpine skiing, biathlon, cross country skiing, ice sledge hockey, powerlifting, shooting, swimming, and wheelchair dance. [ 15 ]
A centerlock wheel is a type of automobile wheel in which the wheel is fastened to the axle using a single, central nut, instead of the more common ring of 4 or 5 lug nuts or bolts. It is mostly used in racing and high end sports cars.
The design of the RoughRider originally was open-source and has been revised with input from wheelchair users in over 40 countries since 1980. [2] The RoughRider was created to fill the demand for a reliable wheelchair for over 20 million disabled people in the developing world who need a wheelchair and do not have one. [3]
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