Modular permanent magnet chuck

Details Modular permanent magnet chuck Modular permanent magnet chuck

2007-01-09

2007-01-09

Enad, Elvin (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Work or object holding type

C335S291000

Reexamination Certificate

active

11106333

ABSTRACT:
A permanent magnet chuck for holding or lifting workpieces is formed of two overlying/underlying flat surfaced chuck layers having a common center of rotation. In each chuck layer an even number of permanent magnet plates radiate from the center of rotation at equal angles with blocks of magnetically soft material between them. The permanent magnet plates are magnetized so that the interposed soft magnet blocks exhibit alternating N-S magnetic polarities. The organization of the permanent magnet plates and soft magnet bodies is matching and complementary so that relative rotation of the chuck layers magnetically activates or de-activates the chuck.

REFERENCES:
patent: 2972485 (1961-02-01), Ferchland
patent: 3968986 (1976-07-01), Nagata
patent: 4250478 (1981-02-01), Cardone et al.
patent: 4314219 (1982-02-01), Haraguchi
patent: 4542890 (1985-09-01), Braillon
patent: 5435613 (1995-07-01), Jung
patent: 6076873 (2000-06-01), Jung

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