Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Lifter
Patent
1986-07-31
1988-02-23
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Lifter
E21B 1900
Patent
active
047265655
ABSTRACT:
A post puller having substantially universal application for pulling posts of various cross-sectional configurations and characterized by a pair of transversely spaced jaws carried by the pulling clevis opposite the clevis pin, the clevis being pivotally connected adjacent one end of a lever handle which is pivotally supported by a stand, the space between the jaws accommodating the leg of T-shaped posts, and the jaws engaging the base of the U-shaped posts, during the pulling operation.
REFERENCES:
patent: 1056516 (1913-03-01), Drake
patent: 1522979 (1925-01-01), Ratigan
patent: 1666454 (1927-04-01), Johnson
patent: 1761675 (1930-06-01), Mick
patent: 1848426 (1930-02-01), Kvall
patent: 2436510 (1945-03-01), Ferguson
patent: 4161310 (1979-07-01), Parker
patent: 4203577 (1980-05-01), Hafner
patent: 4422621 (1983-12-01), Ekern
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