Electrically operated disc brake

Details Electrically operated disc brake Electrically operated disc brake

2005-02-15

2005-02-15

Lavinder, Jack (Department: 3683)

Brakes

Wheel

Axially movable brake element or housing therefor

C188S071700, C188S156000, C188S162000

Reexamination Certificate

active

06854572

ABSTRACT:
An electrically operated disc brake includes a ball/ramp mechanism operable to convert rotary motion of an electric motor to linear motion and transmit the linear motion to a piston so that the piston is advanced to urge a pair of friction pads against opposite sides of a disc rotor to produce a barking force. The disc brake also includes a pad wear adjusting mechanism operable to threadably move the piston relative to an axially movable member of the ball/ramp mechanism in response to the amount of pad wear. The axially movable member has a female thread along its full length. The piston includes a piston head and a piston rod joined to the piston head. The piston rod has a male thread or threaded section. The threaded section has a length such that the piston can safely be moved together and relative to the axially movable member. The piston also has a smooth section extending from the threaded section toward the disc rotor. A holder is secured to the caliper body and carries a seal in which the smooth section of the piston rod is slidably received. A dust boot is connected between the piston head and the caliper body. A combination of the dust boot and the seal or dual seal arrangement reliably seals the interior of the caliper body.

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