Article gripping apparatus

Details Article gripping apparatus Article gripping apparatus

1997-12-03

1999-12-07

Kramer, Dean J.

Handling: hand and hoist-line implements

Grapple

Slideable jaws

294 88, 294 8162, 294 871, 294907, B66C 142

Patent

active

059970642

ABSTRACT:
An article gripping apparatus capable of gripping the articles with adequate gripping pressure without damaging or dropping the gripped articles is disclosed.
The apparatus comprises paired clamp arms 7 opposedly arranged free to open and close; a plurality of opening- and closing driving means 10 for individually opening- and closing moving the clamp arms; a hydraulic jack 13 provided on each clamp arm and having a plunger 14, the plunger being prevented from backward movement by liquid sealed therein; clamp bodies 12 provided at the extreme end of the plunger; and pressure detection means 21 for individually detecting liquid pressure in the hydraulic jack, wherein when the pressure detection means detects the rise of liquid pressure in the hydraulic jack in excess of a predetermined pressure when the article is gripped between the pair of clamp bodies, the opening- and closing driving means for the clamp arms is stopped.

REFERENCES:
patent: 4533167 (1985-08-01), Johnson
patent: 4579380 (1986-04-01), Zaremsky et al.
patent: 4591198 (1986-05-01), Monforte
patent: 5100285 (1992-03-01), Wagner

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