Pickup method and apparatus

Details Pickup method and apparatus Pickup method and apparatus

1976-12-09

1978-10-24

Marbert, James B.

Handling: hand and hoist-line implements

Miscellaneous compound implement

294 64R, 214 85D, 294 655, B66C 100

Patent

active

041218655

ABSTRACT:
A multipurpose lifting device with variable holding power to both electromagnet and vacuum cup pickup structure to eliminate any physical damage either external or internal to the workpiece by distortion, with a permanent magnet feature to be used as a standby safety, or used in conjunction with the electromagnet and vacuum cup structure to triple the lifting power per square inch of surface area when attached to the workpiece. This structure is a perfected device for picking up a plate or sheet of ferrous or non-ferrous material individually from a stack of same. The power to the unit can be variably controlled to eliminate distortion to the sheet or plate for transport with an independent self-regulating permanent magnet safety for ferrous metal. If all power to the apparatus fails, it will automatically retain the ferrous metal sheet indefinitely until it can be brought to rest in a safe position.

REFERENCES:
patent: 3159418 (1964-12-01), Hansen
patent: 3409149 (1968-11-01), Graux
patent: 3517835 (1970-06-01), Temple
patent: 3795334 (1974-03-01), Ishidu et al.
patent: 3858926 (1975-01-01), Ottenhues

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