Implements or apparatus for applying pushing or pulling force – Portable implements or apparatus for tensioning flexible... – Including expansible chamber fluid motor drive
Patent
1989-08-25
1991-10-08
Matecki, Katherine
Implements or apparatus for applying pushing or pulling force
Portable implements or apparatus for tensioning flexible...
Including expansible chamber fluid motor drive
254132, B66D 1100
Patent
active
050547445
ABSTRACT:
A puling device including a leverage mechanism to provide pull and lift by manipulation of a chain, and a force application mechanism to provide the leverage. The force application mechanism provides a variable torque that is at a maximum when the leverage mechanism is in a position to remove ground embedded structures, including posts. The torque diminishes as the leverage mechanism rotates and the structure is lifted. As the structure is lifted the configuration of the chain increases the rate of lift and also provides sufficient lift to remove structures deeply embedded in the ground.
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