Auto hand pump

[beerthief]

I saw a video of a HP hand pump driven by a large fly wheel with a smaller wheel to actually drive the pump handle , steam locomotive style , in and out , about the same speed or even a bit slower than using your body to manually operate it . Got me thinking : have to be a slow movement maybe 3 pumps a minute with a fan (with duct work to direct the air flow )for cooling . HAHAHA just wonder how long the pump would last ? interesting video .

EDIT : was hopeing it would get posted Thanks NOTE : remember the old wind mill water pumps on farms .slow up and down to a hand water pump . strictly mechanical

 

[Hateful McNasty]

Theres one that a guy did it several ways.. lol.. what folks can dream up.. some folks got too much time on there hands , but interesting fun to see stuff.

You know he probably got more invested in any one he made then a compressor cost anyway..

Yrue youd need low reduction motor or gearing. I had a gear box for a old electric horse walker that fit that bill ...

Find a junk lawnmower/ tractor with a hydrostatic transmission may work

 

[BlackICE]

WATCH ME PUMP 5000 PSI out of 2 hand pumps tethered together!!! 🤣

Just a quick update. I changed around the configuration a bit so it was not so big and re routed the hoses and pneumatic switches lower on the base. So it does not look so big. One of the first automated versions...you can still see the old mounted manual hand joystick in back but it is not...

www.airgunnation.com

I think Health Services eventually did buy a compressor even after getting this dual pump pneumatic powered DIY to work well.

I'm still using my one horsepower motor driving a 40 to 1 gear reducer moving a hill MK3 pump. The performance of my DIY is 20 L per minute at 4500 PSI and can be two times or more higher at lower pressures. I can only run in for maximum of one and a half minutes followed by a 10 minute minimum cool down cycle. Limiting the total throughput and I have to babysit it unless I build a more complicated controller. Given the amount of work I had to do to design a fabricated if I had to do it again I would probably buy a compressor. When I made it nothing was available other than scuba compressors or omegas. I didn't like the omega's and scubas or too expensive. Nowadays I think one of those GX compressors with an extended warranty would ensure low cost per year even if you figure you'd have to replace it within 3 years.

 

[Beer Nap]

I was thinking about hooking mine up to the garage door opener.

 

[BlackICE]

I was thinking about hooking mine up to the garage door opener.

Is it a belt, chain or worm gear drive. Most GDO are only 1/4 to 1/2 HP you will have to have it go slow enough like less than 25 strokes per min to reach 4500 psi.

 

[Beer Nap]

Is it a belt, chain or worm gear drive. Most GDO are only 1/4 to 1/2 HP you will have to have it go slow enough like less than 25 strokes per min to reach 4500 psi.

My original thought was to attach it to the floor and door and just sit there drinking a beer and hitting the remote at the right times. It would beat just watching the grass grow..

 

[Blankshot17]

I always thought it would be more efficient in the set up, the two pumps was to invert one to equalize the strain on the pumping cylinder. Also thinking that would balance the compression strokes and reduce the added psi requirements for the added atmospheric air to the top of the pumps.

WATCH ME PUMP 5000 PSI out of 2 hand pumps tethered together!!! 🤣

Just a quick update. I changed around the configuration a bit so it was not so big and re routed the hoses and pneumatic switches lower on the base. So it does not look so big. One of the first automated versions...you can still see the old mounted manual hand joystick in back but it is not...

www.airgunnation.com

 

[BlackICE]

My original thought was to attach it to the floor and door and just sit there drinking a beer and hitting the remote at the right times. It would beat just watching the grass grow..

Garage door openers have self protection mechanisms so it's likely that the motor will either slip the clutch or stop and reverse because it thinks there's an obstruction. Also most garage door springs are not designed for many cycles. Design lifetime is around 10,000 Cycles or less and then the spring breaks. So you wouldn't want to cycle up and down where you have to pump hundreds of times to fill your gun your spring is likely to fail prematurely. Also you have to stop and the right times on the up and down stroke or may damage the pump, garage door or GDO. Setting the limit switches may work but I doubt that it would be consistent enough.

 

[Slingworks]

I've been contemplating the possibility of converting a full size air compressor (Pump only) into one. Using the case/crank/motor and connecting rod. I'm left wondering a bit if it would pick up enough oil vapor to cause issues?