1964 – “Tree Stomper” – Robert G. LeTourneau (American)

LeTourneau Tree Stomper Model 6-110 of 1964 was a walking vehicle of the same principle of walking draglines. It was used for land clearing job in Dare Country, North Carolina. 120 t, 475 hp Detroit Diesel.   Upper picture from the book 'R.G. LeTourneau Heavy Equipment' by Eric Orleman, Iconografix, 2008. Lower pict. From book …

1939 – Walking Draglines – (English)

The earliest known actual walking dragline was from Ransomes & Rapier 1939 using the patented Cameron and Heath  walking method. Model W170, it had a 4-yard bucket. TRACTION OR PROPULSION MECHANISM OF THE WALKING TYPE –  Cameron et al. Colin McLeod Cameron and Alfred Thomas Heath British Patent 320,223 Granted Feb 21, 1940. Filed Mar …