Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent
1997-05-06
1999-08-03
Scherbel, David A.
Implements or apparatus for applying pushing or pulling force
Step-by-step traveling bar
Pawl actuated
B66F 104
Patent
active
059314460
ABSTRACT:
A pole jack apparatus for travelling up and down a pole including a frame member with a jacking mechanism. A pump lever is utilized for causing the jacking mechanism to engage the pole for upward and downward travel. The jacking mechanism includes an interlock device to ensure that one of two engagement pins is engaged with the pole at all times. A separate spring biased, "dead man" brake is also provided for added safety.
REFERENCES:
patent: 4382488 (1983-05-01), Anderson
patent: 4463828 (1984-08-01), Anderson
patent: 4597471 (1986-07-01), Anderson
Fors Arne I.
Halpern Benjamin
Scherbel David A.
Winsafe Corp.
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