Air powered secateurs

[fowler]

so i found a small pneumatic cylinder at work

it may not be big enough

but now the idea is seeded so its happening
if its under powered i'll source a bigger one

my first step is to convert a cheapy manual set

im sure iv got it sorted but iv confused myself with not loosing too much mechanical advantage

pic one is how a factory set works

but i think pic two will retain the advantage by retaining the scissor

alternately if anyone else has a better idea come forth
the biggest issue is using a cylinder to actuate it must be a push action to close them

i have around 6in of stroke making it fairly easy

 

[itsid]

No need to cut anything...

just remove the lower nylock nut, swing the arm above the upper handle
and attach your pneumatic cylinder to it.

the lever is a bit short if you ask me, so maybe you want to replace the lever with a slightly longer one,
but after all.. that lever above the handle will close the blades if pushed forward.

'sid

[EDIT]
made a quick and dirty photoshop mockup
same principle (just a longer lever )


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