2 way piston

[jostev]

just wondering if a 2 way piston could be used as just single action? i would think yes, if you left the other pressure hole unplugged, but then you would get "crap" inside it...

just wondering

Thanks

Johnny

[Bigdog]

Johnny, It can be done using a vent cap (breather) with a screen or filter in the port.

[grumpy]

OK, straighten the old man out--I've played with motors etc. for years and never heard of a 2 way piston. I'm either brain dead,ignorant,stupid or unimformed . OR maybe I haven't had a drink today but in all honesty I'm lost on this one. Dave

[FCUBMAN]

OK, straighten the old man out--I've played with motors etc. for years and never heard of a 2 way piston. I'm either brain dead,ignorant,stupid or unimformed . OR maybe I haven't had a drink today but in all honesty I'm lost on this one. Dave

You are none of the above I think they are talking about a hydraulic piston, not an engine piston. Instead of running oil under pressure to both ends, he'll put pressure to one end only, and let the load return the piston home. The other inlet of the cylinder will inhale dirt and crud, unless protected somehow.
I think that a Sterling engine uses both sides of the piston...anyone?

Brian

[Bigdog]

I believe the correct terminology would have been "double acting cylinder".

[John *.?-!.* cub owner]

Johnny, if you are installing the cylinder to swivel a grader blade, or in a simialar location where it is subject to dust, you may want to use a hose on the end, and locate the filter higher on the tractor. Also, if it is a used cylinder it may have oil in the second end already that will be pushed out the first time it is activated.

[grumpy]

Whew Thanks guys, I was trying to think of everything I could relate that to and that never crossed my mind. Senior moment. Thanks. Dave

[Patbretagne]

Yes I have to admit that it stumped me a bit the title, puts me in mind of some old slow moving engines we had here CLM they had two pistons in each cylinder working in opposition to one another, the bottom one was connected ordinarily to the crankshaft and the top one went down to the crank by a set of levers and shafts to do its bit of pushing.
Fordson E27N with said engine http://clm72.free.fr/machinesagricoles/ ... ordson.htm
They were also used in boats, in the maginot line during the war for generating purposes, I havn't yet come across a description or drawing.
Pat

[George Willer]

OK, straighten the old man out--I've played with motors etc. for years and never heard of a 2 way piston. I'm either brain dead,ignorant,stupid or unimformed . OR maybe I haven't had a drink today but in all honesty I'm lost on this one. Dave

You are none of the above I think they are talking about a hydraulic piston, not an engine piston. Instead of running oil under pressure to both ends, he'll put pressure to one end only, and let the load return the piston home. The other inlet of the cylinder will inhale dirt and crud, unless protected somehow.
I think that a Sterling engine uses both sides of the piston...anyone?

Brian

I haven't thought about a Sterling engine for years. I may be wrong about this, but I THINK the power piston works only on one side while the displacer directly connected to it uses both sides. A little research will tell the true story.

Here's another idea... to use a single acting cylinder to angle a blade will require an artificial load to return the piston. A strong spring should do it.

[Jim Becker]

Here's another idea... to use a single acting cylinder to angle a blade will require an artificial load to return the piston. A strong spring should do it.

Blade positioning can also be done with 2 1-way cylinders hooked to a 2-way valve. The advantage of such a set up is that the speed and power will be the same whichever way it is being turmed.

[Rick Prentice]

George wrote:

to use a single acting cylinder to angle a blade will require an artificial load to return the piston. A strong spring should do it.

The cylinder on my old Willys snow plow, used to lift, was a two way with the stone filtered plug installed on the top fitting. The one thing I noticed, when the cylinder was retracted, it was easily pulled out with just your hands. I know the fluid will not compress, but pulling created an air cavity that had vacuum and would suck back in when you let go.

It might not work using that set-up to angle a blade. Angled one way would work, but angled the other would have that spring/vacuum feel to it.

Rick

[jostev]

Thanks guys, this helped alot

yeah, sorry for you guys who didn't understand, I wasnt' too specific

I was thinking of using a spare piston I have layin around to lift our plow on our truck, the one we have now just squirts fluid out, after plowing 1 driveway (out of 4) i have to refill the pump, which takes ATF (really old ) so i think i have a short enough piston, just wondering ifn I oculd use it to lift, and let down without power...

Thanks yall, i guess i'll go to CRAPA (NAPA) and look for a vent type thing

Thanks

Johnny

[Rick Prentice]

Johnny, here's what I have in my cylinder for lifting the plow and turning the 2 way cylinder into a one way

Rick

[yaume]

Pat I gues you know this one

Here is another two cylindered four pistoned engine.

MAP tractor made in france until mid 50's
http://www.tract-old-engines.com/map.htm

a bit like CLM (two stroke diesel), but with a root compressor , and horizontal cylinder.

[John *.?-!.* cub owner]

That is a fascinating engine, sure wish I could read what it says.