Espresso pump > pneumatic gun.
Stirrup pump > espresso machine.
Thinking out loud.
BoyntonStu
(BTW the old style pull handle espresso machines were inadequate to create 9 bar).
Espresso machines use 9 bar pumps. Hmmmn!
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boyntonstu
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CpTn_lAw wrote:My expresso machine pumps 18 bars.... so, better get some more informations!
Correct!
I was thinking:
Piston-driven
The piston, or lever, driven machine was developed in Italy in 1945 by Achille Gaggia, founder of espresso machine manufacturer Gaggia. The design generically uses a lever, pumped by the operator, to pressurize hot water and send it through the coffee grinds. The act of producing a shot of espresso is colloquially termed pulling a shot, because these lever-style espresso machines required pulling a long handle to produce a shot.
There are two types of lever machines; manual piston and spring piston design. With the manual piston, the operator directly pushes the water through the grounds. In the spring piston design, the operator works to tension a spring, which then delivers the pressure for the espresso (usually 8 to 10 bar).
Oh , i see, nice, i didn't know it worked like that ^^ !! However, an expresso-machine pump doesn't have a very good flow....and they are a little bit louder than fridge compressors. Still, what idea(s ) did you have in mind?
"J'mets mes pieds où j'veux, et c'est souvent dans la gueule."
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velocity3x
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Nitrogen is cheaper and requires less work
Last edited by velocity3x on Thu Dec 17, 2009 12:14 pm, edited 2 times in total.
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john bunsenburner
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Couldn't of put it better my self, find the patent and rebuild it. I have seen it too, the 18bar one, and did think spudguns 
"Did you ever stop to think that out of the seven deadly sins envy is the only one which doesn't give the sinner even momentary pleasure"-George Will
Are it liquid pumps? So.. are the pumps suitable for pumping gas?