Implements or apparatus for applying pushing or pulling force – Screw
Patent
2000-02-17
2000-11-28
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Screw
254133A, B66F 308
Patent
active
061524247
ABSTRACT:
A screw device for imposing spreading forces on opposing surfaces, having a pin adjustable length and employing a rod member having a groove in the end for engaging the pin.
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Kramer Daniel
Watson Robert C.
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