Tired of pumping (video link updated)

[Sfttailrdr46]

  Great design Shorty I works and does exactly what you desire and more importantly you can shoot without clearing the sweat from your eyes and waiting for your pulse to calm down

[Shooterr]

I like these two ideas combined, boosting the hand pump with a portable air tank and using extra leverage on the hand pump.  Great ideas, I just might try this !

[FNG54]

Borrowed my wifes google account to do this.





Part 1 is with the PC power supply from around 1500psi to 2000 psi before current overload shut the power supply off.
Part 2 is using a very old battery that barely holds a charge ( 2000 psi to 2700psi ) I stopped the video before 2700psi but wanted to prove it goes well over 2000psi.

Thanks for the video! I think!!

I don't need this I get scuba fills free.  But, I have tube steel, angle iron, steel plate, batteries and a smart charger and some free time.
If I can get a motor and bearings real cheap. I may build one anyway... Just because.

Also for a non grid cabin or long truck camping trip it should not be to hard to power this with an old bicycle. Just need the right size sprocket in place of the rear wheel. And you could use your legs to pump.

[RMM]

Well I've been at it again!! This time I took one of these http://www.harborfreight.com/automotive-motorcycle/winches/2000-lb-marine-electric-winch-61237.html (I got it on sale for $40 a few years ago) and made the below.   It will pump up to 3000psi@19rpm and fill a 13ci bottle with a break or two and that's it.   LOL!!   

I though I'd post this pump setup just to see if it would create ideas for anyone to come up with a feasible 12VDC hand pump assist as this is the closest I've come to an economical way to do so.  The duty cycle on the winch is low as well as the construction so longevity is in question but I'll use it till it dies.       I've had the motor up to 120F, stopped and let it cool down.   One thing I can say is this would be the cat's meow for 1500psi fills on let's say a FDPCP and with that said I think it would last quite awhile.  One thing that would make this more reliable would be a motor rewind(?) to make it more efficient but rewinding is way out of my job skills so if someone has any info on if it is feasible and cost effective. 

Let your creative juices flow!! 

UPDATE!!!

The gear teeth are to soft and the larger gear, the one with the arm, on the output side sheared its teeth.   This is a no go.   



 

[shorty]

Great work RMM....
Now that's what I call tinkering.You have some nice aluminum stock there. Where you getting all your metal at ?

I finally bought a car jump starter at harbor freight to power mine ($40). Works great because it has a on/off switch and built in charger.

 My Benji pump finally took a dump and now I am on a quest to start figuring out how to chop it up to make a pump package in half the size or smaller. So in theory, if the pump has half the stroke or less, the motors gets cheaper (much cheaper). Don't need that 600 lbs per inch.

So Iam on the fence as to place my motorized pump thing up for sale or trade for a hill pump while I am tinkering with the benji pump. Just not sure if it would sell and I don't want to be responsible if someone gets hurt using it.

Another funny thing, I have been charging from 1500 psi to 3000psi with no cool down periods. I bought those cut to length formable cooler packs and wrap it around the main cylinder. And no, this aint why the pump failed. Pump was on it's way out before motorizing it. It sure keeps the pump cool though.

[RMM]

Great work RMM....
Now that's what I call tinkering.You have some nice aluminum stock there. Where you getting all your metal at ?

I finally bought a car jump starter at harbor freight to power mine ($40). Works great because it has a on/off switch and built in charger.

 My Benji pump finally took a dump and now I am on a quest to start figuring out how to chop it up to make a pump package in half the size or smaller. So in theory, if the pump has half the stroke or less, the motors gets cheaper (much cheaper). Don't need that 600 lbs per inch.

So Iam on the fence as to place my motorized pump thing up for sale or trade for a hill pump while I am tinkering with the benji pump. Just not sure if it would sell and I don't want to be responsible if someone gets hurt using it.

Another funny thing, I have been charging from 1500 psi to 3000psi with no cool down periods. I bought those cut to length formable cooler packs and wrap it around the main cylinder. And no, this aint why the pump failed. Pump was on it's way out before motorizing it. It sure keeps the pump cool though.

Take a look at the UPDATE! I posted today.       Back to the drawing board she's dead!!   

I was actually trying to find something that was doable by the home DIY guys, especially for the ones with disabilities who want to shoot but have trouble pumping by hand plus try to keep it economical. 

The aluminum I get here local and it was from another project that's why there's a herd of holes in it. 

I wouldn't have sold my ATV winch pump setup and only would have posted the what for's and why not's here for someone to make themselves.   Yep I'm also nervous about liability and wasn't going to take the chance.   

I can't help ya on the pump in half thing because I haven't stayed at a Holiday Inn Express lately.  If you work out the kinks let us know as I for one will be tinkering with any economical and DIY way to help our disabled shooters. 

I like your idea of cooling the pump and was thinking about extending the fins upward to give more cooling area, just haven't done it yet.  If I've read correctly heat and moisture are two things that can wear these Benji pumps out.  I believe my desiccant pack is helping the longevity of my pump in the moisture area but I'll have to give it a maintenance tear down to see.  Something else on the list of things to do..  LOL!!   

Keep the good stuff coming Shorty. 

[Kerplink]

 My Benji pump finally took a dump and now I am on a quest to start figuring out how to chop it up to make a pump package in half the size or smaller. So in theory, if the pump has half the stroke or less, the motors gets cheaper (much cheaper). Don't need that 600 lbs per inch.

I'm not an expert on HPA pumps so this could be wrong but I think cutting it in half might limit the top pressure achievable and/or increase the number of strokes required more than exponentially. It would also limit the percent of time that the seals spend in the relatively cooler top portion of tube. If time to fill is not a concern (and it sounds like it's not), why not just gear the motor down enough so it requires less torque?

Make those gears (or sprockets) do the work!