Jumping jack compactor - GIF

[Altair]

Jumping jack compactor/tamper.



1:30 video:

Previously:

1964 Tree stomper by R.G. LeTourneau
Ride-on roller attachment for tractor - photo
Warsop Benjo power rammer - video, patent, diagram

[hemmjo]

That looks like a diesel powered jumping jack. But it must be gas powered since the guy said the sparkplug wire keeps coming off.

[jdurand]

I remember a gasoline powered pogo stick when I was in engineering class back around 1973. We studied how it worked, no spark plug, just a wire that sparked to the piston at the top of stroke.

[baja]

A guy I worked for 40 years ago called those a Tfote...the feet of a thousand elephants.

[Liquidhandwash]

looks like a movie prop from star wars

[Scotsman Hosie]

Guaranteed to crimp steel toed boots, onto both feet – in a one step operation.