School bus door/service brake interlock retrofit system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 9, 2004
Grant Date -
N/A
app pub date -
Jul 19, 2000
filing date -
Jul 19, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bus door/service brake interlock system having a warning system is provided to inform a driver that the service brake pressure is insufficient or not being applied at all, as well as indicating if a system malfunction occurs, precluding a service brake application. The system is based on a sequential operation of the driver activating the caution lights and opening the door. Once these events have occurred, the autobrake system including an alarm is activated. On the other hand, applying the park brake deactivates the autobrake system. The autobrake assembly energizes a solenoid that receives regulated pressure from a pressure reducing valve. This pressure is supplied to one side of a double check valve, while the other side receives a delivery from the foot valve to assure delivery for normal service braking.
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Family
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