Post puller

Details Post puller Post puller

1986-02-19

1988-06-14

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Pipe or rod jack

Lifter

E21B 1900

Patent

active

047507110

ABSTRACT:
A device for pulling fence posts from the ground, and for digging holes for the emplacement of fence posts. One embodiment comprises a substantially T-shaped member pivotally mounted on a shaft. A second embodiment comprises a rigid triangular member pivotally mounted on a shaft. Each embodiment further comprises a pair of wheels mounted on the shaft, which thereby serves as an axle for the wheels. Two very important advantages of the first and second embodiments are (1) a continuously variable mechanical advantage and (2) automatic adjustment of the distance of the device from the fence post being pulled up for maximum efficiency. A third embodiment of the invention comprises a digging machine connected to one of the first two embodiments. Either of the first two embodiments are also useful for transporting fence posts or other materials needed in laying fences, or for stringing wire between fence posts.

REFERENCES:
patent: 114730 (1871-05-01), Wagner et al.
patent: 345467 (1886-07-01), Williams
patent: 461689 (1891-10-01), Sherman
patent: 513129 (1894-01-01), Miller
patent: 862495 (1907-08-01), Mason
patent: 900455 (1908-10-01), Weir
patent: 909297 (1909-01-01), Helgeson
patent: 2341106 (1944-02-01), Kuzeld
patent: 2377399 (1945-06-01), Brumfield
patent: 2499458 (1950-03-01), Campbell
patent: 2662777 (1953-12-01), Wilchek
patent: 3913762 (1975-10-01), Alexander

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