Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Lifter
Patent
1990-04-16
1991-04-23
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Lifter
B66F 300
Patent
active
050093940
ABSTRACT:
A post extracting apparatus is disclosed in which a unitary bent plate of substantial thickness and strength having a "T" shaped aperture located in a plate portion adjacent the bend allows the plate to be slipped down over a T-shaped fence post to fit within about a foot or so of the buried base of the post. The bent plate implement is then rocked into a postgripping position and an upward force is applied to a protruding portion of the plate such as by means of a standard automobile jack. The T-shaped post is wedged by the plate device adjacent its aperture, thus making contact in as many as six (6), and at least four (4) locations on the post, depending on the size and uniformity of the fence posts, gripping the post so as to transfer the upward jacking force to the post causing its extraction.
REFERENCES:
patent: D298794 (1985-04-01), Allen
patent: 697625 (1901-04-01), Hogenson
patent: 1916463 (1933-07-01), Carrel
patent: 1999174 (1935-04-01), Jackson
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patent: 3762687 (1973-10-01), De Rome et al.
patent: 3815875 (1974-06-01), Koebel
patent: 4040601 (1977-08-01), Boardman
patent: 4161310 (1978-06-01), Parker
patent: 4738433 (1986-03-01), Hoff
Jackson Larry A.
Watson Robert C.
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