Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Lifter
Patent
1995-01-20
1996-03-19
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Lifter
E21B 1900
Patent
active
054997950
ABSTRACT:
A post pulling device with a vertical support member attached to a base plate and engaging the support member and having an elongated telescoping handle connected to a reenforced C-shaped head portion. The head engages a post, specifically a T type post, and pressure is applied to the handle structure. The post is lifted out of the ground a corresponding distance. Upon raising the handle, the head "ratchets" down the post and the process is repeated. The device is rigidly constructed from sufficiently strong metal tubing to allow it to be subjected to the most rigorous conditions.
REFERENCES:
patent: 2777726 (1957-01-01), Lundgren et al.
patent: 4161310 (1979-07-01), Parker
patent: 4726565 (1988-02-01), Keller
patent: 4738433 (1988-04-01), Hoff
patent: 5022632 (1991-06-01), Beideck
patent: 5100104 (1992-03-01), Wagner
Litman Richard C.
Watson Robert C.
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