Implements or apparatus for applying pushing or pulling force – Floor jack type – Single throw lever
Patent
1995-08-07
1997-02-25
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Floor jack type
Single throw lever
B66F 300
Patent
active
056053193
ABSTRACT:
The invention disclosed and claimed here is a lumber-straightening device for manipulating a cross-wise structural member relative to an underlying support joist. It includes a base plate which is releasably mountable to the support beam by a pair of pegs which rest on opposite side surfaces of the support beam. A hand-operated cylindrical cam head is pivotably mounted to the base plate. The point of pivotable attachment is off-center relative to the center point of the cam head. This allows the cam head to push a sliding plate against the cross-wise member for bending it into a desired position relative to the support beam. The direction of travel of the sliding plate follows a line or axis defined by the pivot point of the cam head and a separate guide pine, spaced from such pivot point, that follows a groove in the sliding plate. This relationship converts rotational force to linear force.
REFERENCES:
patent: 77610 (1868-05-01), Hall
patent: 1086374 (1914-02-01), Kraemer
patent: 5269494 (1993-12-01), Pittman et al.
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