Magnetic circuit with opposing permanent magnets and method...

Details Magnetic circuit with opposing permanent magnets and method... Magnetic circuit with opposing permanent magnets and method...

2005-08-23

2005-08-23

Barrera, Ramon M. (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

C335S296000, C335S306000, C324S319000, C324S320000

Reexamination Certificate

active

06933820

ABSTRACT:
It is an object of the present invention to facilitate adjustment of magnetic fields. There is provided a magnetic circuit with opposing permanent magnets, comprising: a pair of permanent magnets opposing each other across a gap, the pair of permanent magnets being magnetized in thickness direction; a yoke magnetically coupled to the permanent magnets, and provided outside of the permanent magnets and the gap; a pair of pole pieces each arranged on a gap side of an opposing surface of each of the permanent magnets and having a peripheral projection in opposing direction; and an adjustment permanent magnet piece having magnetic flux amount of at most 2×10−7Wb provided so as to magnetically communicate with a magnetic field formed in the gap.

REFERENCES:
patent: 5055812 (1991-10-01), Abele et al.
patent: 5089798 (1992-02-01), Miyata
patent: 5229723 (1993-07-01), Sakurai et al.
patent: 5864275 (1999-01-01), Ohashi et al.
patent: 5963117 (1999-10-01), Ohashi et al.
patent: 1164356 (1989-06-01), None
patent: 5-87962 (1993-12-01), None
patent: 9056692 (1997-03-01), None

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