Movable yoke-type lifting magnet device

Details Movable yoke-type lifting magnet device Movable yoke-type lifting magnet device

1987-11-27

1989-06-20

Marbert, James B.

Handling: hand and hoist-line implements

Magnet

335285, B66C 106, H01F 720

Patent

active

048404179

ABSTRACT:
A movable yoke-type lifting magnet device including a main core wound with a coil and at least one yoke magnetically coupled to the core. The movable mechanism of the yoke enables the yoke to freely follow the contour of a workpiece to be lifted. An auxiliary core may be provided between each said at least one yoke to provide a yoke-type lifting magnet device. The auxiliary core greatly increases the magnetic forces induced between the cores and the yoke. Combination of the magnetic coupling between the yokes and the core and the provision of the auxiliary core provides a movable yoke-type lifitng magnet device wherein the yoke can freely follow the contour of a workpiece and the magnetic forces between the cores and the yoke are greatly increased. Such a combination prevents the yoke from slipping relative to the cores and stable lifting is possible.

REFERENCES:
patent: 3968986 (1976-07-01), Nagata
patent: 4652845 (1987-03-01), Finkle

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