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I'm trying to organize a project for my kids and have done much research, but seemingly nowhere on the internet does it explain the actual process of piecing together a working air pump. One that would pump a basketball is perfect, but I'll settle for any type. A pictured step-by-step manual would be perfect, but I'll take a video, a link, anything. ANY HELP WOULD BE AMAZING! Thank you.
I've found out you need a handle, a piston to push air, a cylinder, a flexible tube, a connection valve attaches, a second smaller cylinder, an air transfer valve that fills the tires w/o emptying it, and a ball that blocks incoming air that is in the valve.
Here are some videos if it helps any of you.
http://www.youtube.com/watch?v=ZiHpsg6wksc
http://science.discovery.com/tv-shows/deconstructed/videos/deconstructed-how-bike-pumps-work.htm
And here are some basic mechanistic type of information I've found:
The cylinder holds air. The handle moves air in the cylinder when pressed. The connector connects the cylinder with your bike's tire valve. The locking lever locks the pump on the valve. All you need is two pieces of pipe, leather, and two one-way valves. Then you need some hose of course and the part that attaches to the Schreider valve on the bicycle. The pipes have to fit one inside the other. The pumping leather is just some unfinished leather attached to the end of the inner pipe so that it seals it to the outer pipe. Usually the leather also acts as the first one-way valve by leaking when the handle is pulled up. The outer pipe has to be under 2" or else it will be too difficult to operate by hand. The second one-way valve is at the bottom of the pipe and attaches it to the hose so that the air in the tire doesn't come back out through the pump.
Answer
here is one for water. Should not be too different than for air.
http://www.instructables.com/id/Homemade-WaterAir-hand-pump/
I would use a 1" pvc pipe with a cap and a tee..
Use a threaded rod for the piston plunger (or a 1/4" rod with theaded ends will be easier on the pipe cap but you will have to cut threads on the rod -- easy to do with a die)
bolt a piece of leather to the end of the rod using two washers and two nuts.
drill a hole in the cap so that the rod can go through.
attach another piece of pipe (or wood) at right angles to the end of the rod for a handle.
Attach it with nuts.
put a tee at the end of the pump tube and put a pair of check valves at the ends of the tee.
One set up to let air in and the other to let air out. Could be as simple as a ball bearing over a hole..
Your check valves could be as easy as taking a piece of 1/2" pvc pipe and cutting a flat piece of pvc plastic into a circle with a hole saw -- the diameter of the plastic disk should be the same as the outside diameter of the pipe. Put a ball bearing (or marble) with a soft compression spring inside the small piece of pipe and glue on the two disks each with a small [1/4"] hole in it -- one will be plugged with the bearing. On the inlet valve one end can be a pvc cap since it is open to the air.
An adaptor down to a 1/4" hose barb fitting some plastic hose for the air hose. and some hose clamps to hold everything tight. And one inflation needle. If you get a hose with an insdide diameter the same as your fitting to the inflation needle (1/16" pipe?) then you can just clamp it on.
here is one for water. Should not be too different than for air.
http://www.instructables.com/id/Homemade-WaterAir-hand-pump/
I would use a 1" pvc pipe with a cap and a tee..
Use a threaded rod for the piston plunger (or a 1/4" rod with theaded ends will be easier on the pipe cap but you will have to cut threads on the rod -- easy to do with a die)
bolt a piece of leather to the end of the rod using two washers and two nuts.
drill a hole in the cap so that the rod can go through.
attach another piece of pipe (or wood) at right angles to the end of the rod for a handle.
Attach it with nuts.
put a tee at the end of the pump tube and put a pair of check valves at the ends of the tee.
One set up to let air in and the other to let air out. Could be as simple as a ball bearing over a hole..
Your check valves could be as easy as taking a piece of 1/2" pvc pipe and cutting a flat piece of pvc plastic into a circle with a hole saw -- the diameter of the plastic disk should be the same as the outside diameter of the pipe. Put a ball bearing (or marble) with a soft compression spring inside the small piece of pipe and glue on the two disks each with a small [1/4"] hole in it -- one will be plugged with the bearing. On the inlet valve one end can be a pvc cap since it is open to the air.
An adaptor down to a 1/4" hose barb fitting some plastic hose for the air hose. and some hose clamps to hold everything tight. And one inflation needle. If you get a hose with an insdide diameter the same as your fitting to the inflation needle (1/16" pipe?) then you can just clamp it on.
How much psi can a bicycle foot pump produce?
asianrappe
I just want to know beacause I'm going to try to upgrade my water gun lolz. I know this sounds really dumb but yeah. Or i was thinking like my own weird water gun battle armor lolz. Something like Iron Man i was shooting around the idea but I really don't know much about water systems and psi >.< So can ya help me out folks? I'm just another kid with another weird idea. ;]
Answer
My Joe Blow pump goes to 165psi. You can try a Crank Brothers mountain bike fork pump if you need more pressure they go up to 300psi
My Joe Blow pump goes to 165psi. You can try a Crank Brothers mountain bike fork pump if you need more pressure they go up to 300psi
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Title Post: How do you construct a Bicycle Air-Pump? (Class Project)?
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Rating: 94% based on 932 ratings. 4,1 user reviews.
Author: Unknown
Thanks For Coming To My Blog
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