Patent ID: 7592890
Filing Date: 2009-09-22
Classification: F16D

Abstract:
1. A magnetic path member comprising: a first magnetic portion made of a magnetic material and formed in an annular shape symmetrical about an axis; a second magnetic portion made of a magnetic material surrounding the first magnetic portion so as to have the axis in common with the first magnetic portion and leave an annular gap to magnetically separate the first magnetic portion and the second magnetic portion; a first surface formed and shared by surfaces of the first magnetic portion and the second magnetic portion; a second surface formed and shared by other surfaces of the first magnetic portion and the second magnetic portion, said second surface opposed to the first surface; and a non-magnetic portion made of a sintered non-magnetic material and filled in the annular gap to structurally couple the first magnetic portion with the second magnetic portion, said non-magnetic portion having a depression receding from the first surface into the annular gap and a receding surface opposite to the depression so as to leave a space between the receding surface and the second surface.