Method for holding an object to a surface using valve controlled

Details Method for holding an object to a surface using valve controlled Method for holding an object to a surface using valve controlled

1991-07-23

1993-01-12

Watson, Robert C.

Metal working

Method of mechanical manufacture

Work holding

269 21, B25B 1100

Patent

active

051778572

ABSTRACT:
A technique of holding an object, wherein an object (10) to be held is placed on a holding surface (3) having a plurality of suction holes (4), each of which has a valve (6) therein which is operated in accordance with the difference between the pressure in the upper or outer space and the pressure in the lower or inner space demarcated by the valve (6). The valve (6) is opened by utilizing the phenomena that such pressure difference in those suction holes (4) closed by the object (10) becomes smaller, whereas the valves (6) are closed by utilizing the phenomena that such pressure difference in those suction holes (4) which are not closed by the object (10) and remain open becomes greater, to thereby prevent reduction of the suction force to be exerted on the object (10).

REFERENCES:
patent: 2680994 (1954-05-01), Wood
patent: 2782574 (1957-02-01), Copold
patent: 2855653 (1958-10-01), Kastenbein
patent: 3307819 (1967-03-01), Cocito
patent: 3460822 (1969-08-01), Link
patent: 3484093 (1969-12-01), Mermelstein
patent: 3907268 (1975-09-01), Hale

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