B - Operations – Transporting – 60 – R
Patent
B - Operations, Transporting
60
R
B60R 16/00 (2006.01) A61G 3/00 (2006.01) A61G 3/06 (2006.01) B60P 1/44 (2006.01) B60T 7/12 (2006.01)
Patent
CA 2416059
A parking brake invalift interlock system that includes electrical communication with a park brake solenoid valve. This solenoid valve in a closed position will prevent air from releasing the park brakes. The solenoid valve is engaged to the circuit of the interlock system such that the valve cannot be opened to release the park brake unless the vehicle ignition is in an ON or energized position, the lift is stowed, and the lift door is closed. The invalid or wheelchair lift, referred to as an invalift, is electrically engaged through the interlock system to the ignition system, a park brake pressure sensor, and a lift door position sensor. As a result, the invalift lift control cannot be operated unless the ignition is ON, there is power to a Lift Switch, the park brake system fluid or air pressure is below a predefined pressure setpoint, and the lift door is opened. The system may further be configured to prevent lift door opening unless the ignition is in the ON position. This would be to ensure that the lift has the power to operate.
Kurttila Milton W.
Vinson Harry L.
Finlayson & Singlehurst
International Truck Intellectual Property Company Llc
LandOfFree
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