Parking brake warning device for over the road tractor trailers

Details Parking brake warning device for over the road tractor trailers Parking brake warning device for over the road tractor trailers

1989-08-28

1990-10-30

Orsino, Joseph A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

200 81H, B60Q 100

Patent

active

049671820

ABSTRACT:
A warning device for generating a warning signal when the driver of an over the road tractor-trailer vacates the cab without setting the parking brake. A pressure sensor is used to sense the pressure on the air ride seat and to close an electric switch element whenever the seat is unoccupied. Another switch element is closed when the parking brake is in its release position. The two switch elements are arranged in series with a warning buzzer in a battery powered electric circuit to energize the buzzer if the seat is vacated without the parking brake having been set.

REFERENCES:
patent: 3723968 (1973-03-01), Kelly
patent: 3903513 (1975-09-01), Green et al.
patent: 4620072 (1986-10-01), Miller

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