Brakes – Operators – Electric
Patent
1993-06-07
1994-04-19
Oberleitner, Robert J.
Brakes
Operators
Electric
188164, 188267, 310 93, 310105, B60L 728, H02K 4902
Patent
active
053038029
ABSTRACT:
A vehicle braking system including a brake structure defining an annular surface; an annular magnet support disposed adjacent to the annular surface; a plurality of permanent magnets mounted on the magnet support and circumferentially spaced apart thereon, the polarities of the plurality of permanent magnets alternating circumferentially and each permanent magnet having circumferentially spaced apart end portions of substantially equal cross-sectional area joined by a middle portion of substantially smaller cross-sectional area; an annular pole piece support; and a plurality of ferromagnetic pole pieces mounted on the pole piece support and circumferentially spaced apart in positions between the annular surface and the permanent magnets, each pole piece having a circumferential length substantially equal to the circumferential length of a radially adjacent permanent magnet. Also included is an adjustment mechanism for producing relative angular movement between the magnet support and the pole piece support so as to change the circumferential alignment between the pole pieces and the permanent magnets.
REFERENCES:
patent: 5143183 (1992-09-01), Kuwahara
patent: 5248133 (1993-09-01), Okamoto et al.
Isuzu Motors Ltd.
Jarcho Harold G.
Oberleitner Robert J.
Poon Peter M.
Toupal John E.
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