Brake apparatus with functional integrity monitor

Details Brake apparatus with functional integrity monitor Brake apparatus with functional integrity monitor

1996-02-01

1998-07-28

Oberleitner, Robert J.

Brakes

Wheel

Transversely movable

188134, B60T 872

Patent

active

057851581

ABSTRACT:
The problem of verifying functional readiness of a braking apparatus including: a brake plate rotatable about an axis; an armature and a reaction plate disposed on opposite sides of the brake plate; and an actuator for urging the armature to clamp the brake plate between the armature and the reaction plate in a manner generating braking torque acting on the brake plate with respect to the armature and reaction plate for resisting rotation of the brake plate, is solved by providing an integral brake integrity monitoring apparatus. The brake integrity monitoring apparatus includes features for reacting the brake torque directly against one or more calibrated springs, as the brake is applied, to generate a calibrated relative rotation of the armature with respect to the reaction plate. The amount of relative rotation of the armature and/or reaction plate caused by the braking torque acting against a reacting torque generated by the springs provides a direct measurement of braking torque. The relative rotation between the armature and the reaction plate is measured with a proximity sensor and compared to a reference value of relative rotation corresponding to a minimum functional value of braking torque for a properly functioning brake apparatus, to verify that the brake is producing the minimum required torque. In alternate embodiments, relative rotation is generated and measured between the braking apparatus and a support structure operatively connected to the braking apparatus.

REFERENCES:
patent: 2403952 (1946-07-01), Ruge
patent: 3693770 (1972-09-01), Charchian et al.
patent: 3701401 (1972-10-01), Palma et al.
patent: 4597480 (1986-07-01), Schwarz
patent: 4625843 (1986-12-01), Maltby et al.
patent: 4762205 (1988-08-01), Ortman
patent: 5131268 (1992-07-01), Dillmann

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