Material or article handling – Elevator or hoist and loading or unloading means therefor – Convertible attachment
Patent
1994-04-25
1996-05-14
Keenan, James W.
Material or article handling
Elevator or hoist and loading or unloading means therefor
Convertible attachment
414621, 414623, 414626, 414659, 294 8161, 294 871, B66F 918
Patent
active
055162550
ABSTRACT:
A clamping apparatus for lifting objects includes a frame and first and second opposing clamping arms pivotably supported by the frame about first and second parallel axes. Each clamping arm has a contact portion. A drive member is connected to the first and second clamping arms to simultaneously pivot the first and second clamping arms about the first and second axes. The height of the contact portions when spaced apart by a first separation is the same as when spaced apart by a second separation. As a result, the clamping apparatus can securely grasp both square and elongated rectangular objects.
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Keenan James W.
Tygard Machine & Manufacturing Co.
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