 | | Pneumatic cylinder/pump —Owen Dive
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| | | Hi all. For all those who, like me, have many pneumatic cylinders, but only a limited supply of pumps, I believe I have come up with a way to get a source of air pressure, using a cylinder and two switches. I've knocked a quick circuit diagram up in (...) (18 years ago, 3-Nov-06, to lugnet.technic)
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| | | | | Re: Pneumatic cylinder/pump —Steve Lane
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| | | | | (...) I think a much better solution would be to combine an old red "low friction" cylinder with the old one way air brick. (18 years ago, 3-Nov-06, to lugnet.technic)
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| | | | | Re: Pneumatic cylinder/pump —Timothy P. Smith
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| | | | | (...) [...] (...) Pumps are cheap- way cheaper than cylinders. Just buy a few. You could get three for the cost of a case of bottled water. The price of dinner in a nice restaurant will get you a half dozen or more (depending on where you eat). (...) (18 years ago, 3-Nov-06, to lugnet.technic)
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| | | | | | | Re: Pneumatic cylinder/pump —Ralph Hempel
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| | | | | | (...) OMG. Is that what they are calling it now? Cheers, Ralph Hempel (18 years ago, 3-Nov-06, to lugnet.technic)
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| | | | | | | | Re: Pneumatic cylinder/pump —Jordan Bradford
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| | | | | | | (...) Hehehe. I built one a couple years ago and have never taken it apart because it works so well -- the design is great. I keep it on hand as my pure-LEGO compressor. Once in a while I forget this and try to find my "missing" 9V motor. :) (18 years ago, 3-Nov-06, to lugnet.technic)
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| | | | | | | | Re: Pneumatic cylinder/pump —Timothy P. Smith
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| | | | | | (...) You didn't know?!? It's a famous thing, man! Even Dr. Soh calls his variant a 'modified Hempel'. There's also a four-pump version, the Quad Hempel. It's all over the web- you're worldwide, baby! And, while you're reading this, let me say (...) (18 years ago, 3-Nov-06, to lugnet.technic)
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| | | | | | | | Re: Pneumatic cylinder/pump —Patrick J. Levy
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| | | | | | (...) I also have one Hempel compressor around i never put apart. I must say is the only one lego model i never put apart. Thanks Ralph! Patrick (18 years ago, 5-Nov-06, to lugnet.technic)
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| | | | | Re: Pneumatic cylinder/pump —Owen Dive
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| | | | Well I've just built this, and I can say that with a minor modification the pump works fine. You need to join the outputs from the two switches depicted through a third switch to prevent pressure being lost through the exhaust port. However, since (...) (18 years ago, 12-Nov-06, to lugnet.technic)
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