Vacuum chuck apparatus

Details Vacuum chuck apparatus Vacuum chuck apparatus

1994-12-08

1997-03-11

Kramer, Dean

Handling: hand and hoist-line implements

Utilizing fluid pressure

Frames

294907, 901 40, 901 46, B66C 102

Patent

active

056093772

ABSTRACT:
In a vacuum chuck apparatus for chucking an article, a plurality of movable suction cups are mounted on a support member to be movable up and down relative to the support member between an operative position where each of the movable suction cups can attract the article by suction and a retracted position above the operative position. A plurality of air cylinders move the respective suction cups independently from each other between the operative position and the retracted position. An article size designating circuit outputs a size signal representing the size of the article to be chucked, and a controller controls the air cylinders according to the size signal so that a part of the movable suction cups which are not necessary for chucking the article of the size represented by the size signal are held in the retracted position and the other suction cups are held in the operative position.

REFERENCES:
patent: 4648588 (1987-03-01), Carrell
patent: 4772170 (1988-09-01), Oldfield
patent: 4793657 (1988-12-01), Mense
patent: 5048811 (1991-09-01), Hochbein
patent: 5125706 (1992-06-01), Kuwaki et al.
Patent Abstracts of Japan, vol. 16 No. 223 (M-1253), May 25, 1992 & JPA 04-041342 (AIDA Eng Ltd), Feb. 12, 1992.

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