Motor vehicles – With means for promoting safety of vehicle – its occupant or... – Responsive to engagement of portion of perimeter of vehicle...
Patent
1985-07-15
1986-05-27
Butler, Douglas C.
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
Responsive to engagement of portion of perimeter of vehicle...
188151A, 192 4R, 293 5, 303 2, 303 13, 303 68, B60T 716
Patent
active
045910197
ABSTRACT:
An auxiliary air brake system is provided for a mobile vehicle which has a drive selector having reverse and other positions and which has a main air brake system which includes a plurality of compressed air tanks, main conduit including a foot brake line and a hand brake line for connecting at least one of the tanks to wheel brake chambers, and air control valves in the main conduit for controlling air pressure at the wheel brake chambers. The auxiliary air brake system includes a first additional air control valve controlled by the drive selector, a detector mounted at the rear of the vehicle positioned to be actuated by contact with an external object during reverse movement of the vehicle, a second additional non-electrically actuated air control valve actuable in response to actuation of the detector member and additional conduit which connects the first and second additional air control valves to control the pressure at the brake wheel chambers when the detector member is in its actuated condition and the drive selector is in reverse. The second non-electrically actuated air control valve has a spring biased operating plunger having at one end a roller which is contacted by the detector member to depress the plunger thereby to connect pressurized air to the auxiliary braking system.
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Fisher Brian
Westmoreland Raymond R.
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