Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Lifter
Patent
1991-09-30
1993-05-18
Kisliuk, Bruce M.
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Lifter
254 29R, 254132, E21B 1900
Patent
active
052113744
ABSTRACT:
Disclosed is an apparatus for removing fence posts and related posts form the ground or other media. The invention is designed to be used primarily with tractors and any other mechanical devices fitted with a three-point hitch and capable of lifting the three-point hitch and attachments. The machine includes two gripper blades arranged in V-shaped pattern and pivotally attached to a substantially pyramidical structure. When the post is gripped by the gripper blades, lifting of the base frame causes the gripper blades to pivot downward into the post. Further use of lifting force from the tractor or other related machine lifts the post out of the ground. After the post is removed from the ground, the post can be placed on the ground by lowering the apparatus which allows the post to drop at no greater angle than the arc created by the V-shaped opening formed by the gripper blades and the housing. This opening prevents the post from rotating in the direction of the operator and striking the operator on the back of the head. Further, this means for placing the posts in a given arc permits the operator to continue removing posts in a straight line without having to drive around scattered fallen posts. This device is entirely mechanical in nature and requires few moving parts and adjustments.
REFERENCES:
patent: 3057599 (1962-06-01), Clatterbuck
patent: 4706935 (1987-11-01), Thompson
patent: 4846445 (1989-07-01), Pfeffer
Head Harold W.
Landua Douglas W.
McAdams James A.
Gammon Elizabeth G.
Kisliuk Bruce M.
Morgan Eileen P.
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