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1. (WO2018039033) TREE, STUMP AND POST PULLER

Pub. No.:    WO/2018/039033    International Application No.:    PCT/US2017/047351
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Fri Aug 18 01:59:59 CEST 2017
IPC: E04H 17/26
B66F 1/02
B66F 1/08
E02D 9/02
E21B 19/00
Applicants: MAXWELL, Christian, Lane
Inventors: MAXWELL, Christian, Lane
Title: TREE, STUMP AND POST PULLER
Abstract:
An apparatus for extracting trees, stumps, posts and similar structures from the ground is attached to a 3-point hitch tractor accessory. The apparatus comprises a base frame and a lifting frame. The base frame includes a pair of vertical guides for confining a corresponding pair of vertical rails on the lift frame. A piston/cylinder type of linear motor is connected between the base frame and lifting frame to translate the lifting frame relative to the base frame. A pair of independently controlled gripping cylinders that are connected to respective gripping cams are mounted on the lifting frame. A tree is extracted by engaging the gripping cams against the tree and translating the lifting frame.