US 5,211,374 A · Post puller

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.

Claims10

Dependent claims

A device for extracting fence posts and other similar elongated pieces from the earth comprising:

a. a housing with a front side, a base side, a right side, a left side, and a rear side;
b. means for coupling housing to a lifting mechanism;
c. means for coupling the housing with the lifting mechanism whereby the housing will remain substantially vertical, with reference to the horizon, during the vertical motion of the housing;
d. within the housing, a means for gripping a post to be extracted;
e. the means for gripping the post which is comprised of two substantially horizontal, with reference to the horizon, gripper blades, each composed of a gripping edge and an unsharpened edge which is opposite to the gripping edge, pivotally attached to the base side of the housing;
and
f. a means for horizontally, with reference to the horizon, pivotally mounting the gripper blades in a V-shaped manner whereby the gripper blades are aligned such that the gripping edges of the blades are higher, with reference to the horizon, than the unsharpened edges of the gripper blades when the device is static and whereby the gripping edges are able to rotate or attempt to rotate downward when a post is placed against the gripping edges of the gripper blades and the device is raised.

4 more elements

A device for extracting fence posts and other similar elongated pieces from the earth comprising:

a. an open-sided pyramidical structure with a front face, a base face, a left face, a right face, and a rear face;
b. means for coupling the open-sided pyramidical structure to a lifting mechanism;
c. means for coupling the open-sided pyramidical structure with the lifting mechanism whereby the open-sided pyramidical structure will remain substantially vertical, with reference to the horizon, during the vertical motion of the open-sided pyramidical structure;
d. within the open-sided pyramidical structure, a means for gripping a post to be extracted;
e. the means for gripping the post comprised of two substantially horizontal, with reference to the horizon, gripper blades, each composed of a gripping edge and an unsharpened edge which is opposite to the gripping edge, pivotally attached to the base face of the open-sided pyramidical structure;
and
f. a means for horizontally, with reference to the horizon, pivotally mounting the gripper blades in a V-shaped manner whereby the gripper blades are aligned such that the gripping edges of the blades are higher, with reference to the horizon, than the unsharpened edges of the gripper blades when the device is static and whereby the gripping edges are able to rotate or attempt to rotate downward when a post is placed against the gripping edges of the gripper blades and the device is raised.

4 more elements

Dependencies are inferred from the claim text.

Post puller

Life of this patent

Post puller

Life of this patent

Abstract

Claims10