Implements or apparatus for applying pushing or pulling force – Miscellaneous
Patent
1989-03-06
1990-01-30
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Miscellaneous
254100, 72705, 72392, B66F 310
Patent
active
048968625
ABSTRACT:
A rescue tool has a pair of arms which are opened and closed by rotating a threaded member. The arms are pivotably connected together, and are also connected to a common yoke. The yoke is connected to a piston, which is mounted within a frame. Movement of the piston along its longitudinal axis causes the arms to open and close. The piston is connected to a collar which screws onto a threaded member. Rotation of the threaded member therefore causes the piston to move back and forth along its longitudinal axis, and opens or closes the arms. The threaded member can be connected to an external source of power, such as a pneumatic, hydraulic, or electric motor. Alternatively, the threaded member can be rotated by a hand-operated crank. The rescue tool can be connected to a variety of different power sources, without modifying the internal structure of the tool. Because the power source is coupled to the arms through a threaded member, the arms can be moved with great precision. The invention thus reduces the risk of causing unintended harm to an accident victim.
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patent: 4392263 (1983-07-01), Amoroso
patent: 4531289 (1985-07-01), Brick
Eilberg William H.
Watson Robert C.
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