Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Lifter
Patent
1991-02-11
1992-03-31
Hartman, J. J.
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Lifter
254123, 254131, E21B 1900
Patent
active
051001047
ABSTRACT:
An implement for removing a tree stump or the like defined by a first portion directly engaging the article under removal in a biting relationship and a second portion partly surrounding the article and moving into a confining relationship with the latter. The implement is mounted on a framework for pivotal movement. A manually controlled mechanism defines a removal location by pivotal action and where a locking bar serves to maintain the latter. Ample leverage is afforded for ready one-man operation.
REFERENCES:
patent: 1153024 (1915-09-01), Brown
patent: 2341106 (1944-02-01), Kuzela
patent: 2826392 (1958-03-01), Kohorst
patent: 2994510 (1961-08-01), Michalak
patent: 3848850 (1974-11-01), Bennis
Flackbert Warren D.
Hartman J. J.
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