Selective gripping of inside and outside of articles

Details Selective gripping of inside and outside of articles Selective gripping of inside and outside of articles

1986-06-30

1987-11-10

Marbert, James B.

Handling: hand and hoist-line implements

Grapple

Expanding

294 88, 294 864, 2941191, B66C 142, B25J 1504

Patent

active

047053135

ABSTRACT:
In a preferred embodiment of the invention, a depending pair of fingers may be caused to grip a component on an inside surface by spreading the fingers apart or to grip the outside surface of a component by closing the fingers upon the component, with the relative orientation of the gripping faces of the fingers depending upon sliding displacement of the tool posts supporting the fingers. The fingers are driven into positive engagement with the surface to be gripped, for both inside and outside gripping, via positive displacement and spreading of cam followers by a cam which, in turn, is displaced by a fluid cylinder. Alternatively, the fingers may be biased into engagement with the surface to be gripped, for both inside and outside gripping, with disengagement of the fingers being provided by positive displacement and spreading of the followers by the cam.

REFERENCES:
patent: 3170322 (1965-02-01), Cavanaugh
patent: 4368913 (1983-01-01), Brockmann et al.
patent: 4518187 (1985-05-01), Blatt et al.

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