Vibration damper for a drum brake

Details Vibration damper for a drum brake Vibration damper for a drum brake

1997-06-06

1999-10-05

Oberleitner, Robert J.

Brakes

With condition indicator

Electrical

188250E, F16D 6600

Patent

active

059609125

ABSTRACT:
In order to effectively damp the vibration of the drum of a drum brake, which is a main cause of brake squeals, a vibration detector and a vibrator are provided and operated separately from each other. The vibration damping control is carried out directly mechanically, or in a non-contact manner to improve durability of the device. A piezoelectric element, magnetic sensor or acceleration sensor is used to detect the vibration of the drum. The detected vibration is converted to an electric signal. After adjusting its phase and amplitude, the electric signal is converted to vibration force and outputted through a piezoelectric element or magnetic actuator as the vibrator to suppress brake squeals.

REFERENCES:
patent: 4950966 (1990-08-01), Moulds, III
patent: 5099967 (1992-03-01), Lang
patent: 5209326 (1993-05-01), Harper
patent: 5372221 (1994-12-01), Jalbert
patent: 5409078 (1995-04-01), Ishioka et al.
patent: 5653317 (1997-08-01), Wakui
patent: 5660251 (1997-08-01), Nishizawa et al.
European Patent Office Abstract of Japanese Patent Publication No. 04054325, published Feb. 21, 1992.

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