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Unknown piston
- Thread starter wrench136
- Start date
Roberts210
Well-known member
My guess is it is from a very low RPM antique spray rig. Bronze so it wouldn't react with the chemicals being sprayed.
Debcrow
Well-known member
Do not know. The square opening reminds me of German 2 stroke transfer ports used in the 1950s. Since it does not have any rings I would say not for anything requiring compression. Because of that I would suspect some form of liquid as the medium. Very interesting
Skyman
Well-known member
I have no clue, but it's fascinating. The connecting rod being offset from the wrist pin's axis is an interesting feature.
Old Man Roger
Well-known member
The rod looks way to thin for a piston with that much wieght.
RTM
Well-known member
If it didn’t look used, I was going to suggest a HS class project, as it’s easy to cast. The E12 was how fifth period, student 12 would have marked his.
But low pressure, and low wear, due to the brass / bronze seems likely.
But low pressure, and low wear, due to the brass / bronze seems likely.
Skyman
Well-known member
Antique well pump?
It could be part of a on/off or directional valve.
https://en.wikipedia.org/wiki/Piston_valve_(steam_engine) As it might be in a steam engine.
lg
no neat sig line
https://en.wikipedia.org/wiki/Piston_valve_(steam_engine) As it might be in a steam engine.
lg
no neat sig line
Skyman
Well-known member
Doesn’t look to me as though it was intended to stand up to any significant load.
Roberts210
Well-known member
I grew up on a farm and we had an old spray rig that used a cast iron pump. The piston was ceramic.
The brass or bronze says it's not from an internal combustion engine, and the massive construction of the piston says it's not intended for any sort of high-speed operation. That's just too much weight to be starting and stopping several times per second. The scooped out portion in the piston skirt says that it probably operated like a two-stroke, with that part sliding past two ports in the cylinder, one above the other. I'd say it's part of a piston pump, probably for a liquid, and likely a heavy liquid, judging by the lack of rings. That's as far as I can get.Found this at a friends house. All brass or bronze. From some sort of pump or ??
Any one know what it is ?