Implements or apparatus for applying pushing or pulling force – Floor jack type – Single-throw lever and bar
Patent
1985-05-16
1986-11-04
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Floor jack type
Single-throw lever and bar
A47G 2704
Patent
active
046206914
ABSTRACT:
A board straightening device which embodies levers to expand a concentric piping arrangement, one end of which is fixed on a joist, rafter stud, or other board supporting member, and the other end is placed against a crooked board, such as decking or siding, which is being nailed across the board supporting member. The device includes a cleated foot for gripping the board supporting member, the foot being attached to a pipe member which fits concentrically with another pipe member to which is attached the head or pushing end of the device. A lever arrangement connecting the two pipe members causes them to relatively displace when a lever handle is pushed toward the device. A head attachment, configured to the shape of the board to minimize damage, pushes against and straightens the crooked board for nailing. Limiting and adjusting means for displacement and leverage may be used. A cleated plate with cleat members protruding at approximately a forty-five degree angle from the foot may fix the foot on the board supporting member.
REFERENCES:
patent: 299220 (1884-05-01), Match
patent: 343412 (1886-06-01), Willix
patent: 376439 (1888-01-01), Holmes
patent: 559052 (1896-04-01), Bennett
patent: 1568885 (1926-01-01), Derby
patent: 1766423 (1930-06-01), Bartlow
patent: 1918017 (1933-07-01), Christ
patent: 2717144 (1955-09-01), Labuza
patent: 4230302 (1980-10-01), Crain
Ingman John F.
Watson Robert C.
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