drysdam
Well-Known Member
- Joined
- Feb 10, 2012
- Messages
- 87
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Some background.
tldr: I want to make a manually operated, 100% mechanical water pump for my cat who will only drink running water. The goal is about equal parts hilarity and shop-time, with a distant third of making an actual working device to be operated by a cat.
Step 1: A check valve
(The circled dimensions are embodied below, the others are an even-more-prototypical set I made some of last week.)
I need two of these. One pressed into the base of the cylinder (ordinary copper pipe--hints on machining this material, btw?):
and one in a movable piston (bolt is temporary to hold the ball in place and for testing)
Next up is some kind of handle arrangement. I did some math to compute a few angles and distance ratios. I'm not sure if I'll need a cross head or not. I'm going to start without one and see if I can avoid it. My rain barrel water pump doesn't have one, but it may be more forgiving of a cocked piston.
Anyway, I also mocked it up in cardboard to see if I had my math right:
(I'm working on two other projects at the same time, along with normal life, so who knows when the next update will be.)
tldr: I want to make a manually operated, 100% mechanical water pump for my cat who will only drink running water. The goal is about equal parts hilarity and shop-time, with a distant third of making an actual working device to be operated by a cat.
Step 1: A check valve
(The circled dimensions are embodied below, the others are an even-more-prototypical set I made some of last week.)
I need two of these. One pressed into the base of the cylinder (ordinary copper pipe--hints on machining this material, btw?):
and one in a movable piston (bolt is temporary to hold the ball in place and for testing)
Next up is some kind of handle arrangement. I did some math to compute a few angles and distance ratios. I'm not sure if I'll need a cross head or not. I'm going to start without one and see if I can avoid it. My rain barrel water pump doesn't have one, but it may be more forgiving of a cocked piston.
Anyway, I also mocked it up in cardboard to see if I had my math right:
(I'm working on two other projects at the same time, along with normal life, so who knows when the next update will be.)