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.
Thomas Newcomen was a prominent British engineer, best known for inventing the atmospheric steam engine, which was the the worldâs oldest known steam engine for pumping water. The Newcomen engine largely influenced later designs such as James Wattâs engine.