Two factors dictate the design of an ideal brace: 1  Joints adjacent to the thumb CMC joint must be excluded to maximize function when wearing the brace; thus a design using three points of pressure cannot be used. 2  The brace must specifically prevent CMC dorsal translation.
Expansion valve. An expansion valve is a valve used for different purposes: Steam engines. A valve used to control the expansion of steam: Expansion valve (steam engine) The best-known of these was the Meyer expansion valve, the invention of Jean-Jacques Meyer.
An engineer and experimenter, Nicolaus Otto invented the first practical alternative to the steam engine in 1876 -- the first four-stroke internal combustion engine. He called it the Otto Cycle Engine, and as soon as he had completed his engine, he built it into a motorcycle.