Wear indicator for vehicle air brakes

Details Wear indicator for vehicle air brakes Wear indicator for vehicle air brakes

1989-08-01

1991-02-05

Cuchlinski, Jr., William A.

Signals and indicators

Indicators

Element wear type

116283, 188 111, G01D 1300, F16D 6602

Patent

active

049895370

ABSTRACT:
A brake wear indicator for an air brake system that includes an actuator having a diaphragm adapted to move within the actuator in response to air pressure, and a push rod mechanically coupled to the diaphragm and extending from the actuator through an opening in the actuator wall. The brake wear indicator comprises marking means having a generally cylindrical outer surface, a longitudinal axis, a distance indicator on the outer surface, and means for securing the marking means to the push rod within the opening. The marking means thereby provides a visual indication of the position of the push rod along such axis at the opening. In a preferred embodiment, the marking means comprises a tubular member having an internal diameter large enough to accommodate the push rod, and an outside diameter small enough to permit the tubular member to move through the opening, and a flange having an outside diameter too large to fit through the opening. An indicator formed integrally with the push rod is also disclosed.

REFERENCES:
patent: 1569133 (1926-01-01), Ostrander
patent: 1635349 (1927-07-01), Sandilands
patent: 3298466 (1967-01-01), Ayers, Jr. et al.
patent: 4800991 (1989-01-01), Miller

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