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.
heron also called hero is sometimes credited as the one who invented the steam engine at about 100 a d because he built a device which rotated by jet power from exhausting steam another candidate thomas savery patented a means of pumping water out of coal mines by steam power in 1698