Brake control apparatus obtaining braking force by pressing...

Details Brake control apparatus obtaining braking force by pressing... Brake control apparatus obtaining braking force by pressing...

2005-01-25

2005-01-25

Butler, Douglas C. (Department: 3683)

Brakes

Wheel

Axially movable brake element or housing therefor

C188S071800, C188S162000, C188S1960BA, C188S1960BA

Reexamination Certificate

active

06845852

ABSTRACT:
A vehicular brake apparatus, which is provided at a shaft of a motor that revolves due to depression of a brake pedal, has a variable gear mechanism including a non-circular spur gear that changes a reduction ratio from a high gear ratio to a low gear ratio along with revolution. Revolution is converted to linear movement by roller bearings interposed between two ramp portions each having a straight inclined surface, and a friction member is pressed against a disk by a friction material holding portion being moved in a straight direction. Further, a braking force is generated on the disk by the friction member and another friction member provided on the opposite side of the caliper. As a result, it is possible to generate a highly responsive braking force by the high gear ratio when revolution of the motor initially increases, and possible to reduce electric power consumption using a highly efficient motor speed by changing from the high gear ratio to the low gear ratio in accordance with the motor revolution speed.

REFERENCES:
patent: 5094079 (1992-03-01), Leigh-Monstevens et al.
patent: 5949168 (1999-09-01), Dieckmann et al.
patent: 6173820 (2001-01-01), Blosch et al.
patent: 6279691 (2001-08-01), Takahashi et al.
patent: 6311807 (2001-11-01), Rinsma
patent: 20010023798 (2001-09-01), Usui et al.
patent: A-61-143253 (1986-06-01), None
patent: A-6-183330 (1994-07-01), None
patent: A2001-41269 (2001-02-01), None

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