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A gas duster, also known as tinned wind, compressed air, or canned air, is a product used for cleaning or dusting electronic equipment and other sensitive devices that cannot be cleaned using water. This type of product is most often packaged as a can that, when a trigger is pressed, blasts a stream of compressed gas through a nozzle at the top.
[30] 1964: Aaron Ismach was awarded the Exceptional Civilian Service Award at the Eighth Annual Secretary of the Army Awards ceremonies for his invention of the intradermal nozzle. [31] 1966: Oscar Banker, an engineer, patented his invention of a portable multi-use nozzle jet injector that utilizes CO 2 as its energy source. This would become ...
Doblhoff WNF 342 V4 model. During the Second World War, German engineer Friedrich von Doblhoff suggested powering a helicopter with ramjets located on the rotor tips. His idea was taken forwards and, during 1943, the WNF 342 V1 became the first tip jet-powered helicopter; it used a conventional piston engine to drive both a compact propeller and an air compressor to provide air (subsequently ...
An open-circuit SCBA does not recirculate air; it instead allows respired air to be exhausted outside. While 30 CFR 11 does not restrict the gas that can be used (although compressed air is usually chosen), use of compressed oxygen is not allowed due to the system's exposure to outside air. Duration is usually limited to 30-60 minutes. [10]
Before the injection valve opens, neither fuel nor compressed air can enter the combustion chamber. [16] The closed nozzle design allowed for a good air-fuel-mixture at the time which made it very useful for high capacity engines. This also resulted in lower fuel consumption compared to the open nozzle design.
An early major application of compressed air was in the drilling of the Mont Cenis Tunnel in Italy and France in 1861, where a 600 kPa (87 psi) compressed air plant provided power to pneumatic drills, increasing productivity greatly over previous manual drilling methods. Compressed-air drills were applied at mines in the United States in the 1870s.
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