B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
B60T 13/38 (2006.01) B60T 13/26 (2006.01) B60T 13/68 (2006.01) B60T 17/08 (2006.01)
Patent
CA 2324998
An improved air brake system for tractor trailers is disclosed. The present system immediately engages the trailer brakes of a tractor trailer when an emergency brake control member is engaged by the driver. The trailer brake is operatively coupled to a spring brake having a first spring operatively coupled to the trailer brake, the first spring engaging the trailer brake when the spring is in a relaxed position. The spring brake also has a first pneumatic chamber having a first movable diaphragm, the movable diaphragm causing the first spring to compress and disengage the brake when the first chamber is compressed with air supplied by an air line. Decompression of the first pneumatic chamber permitting the first spring to relax. The present invention comprises an electrically operated exhaust valve mounted adjacent the spring brake and operatively coupled to the first pneumatic chamber, the electrically operated exhaust valve having an exhaust state wherein the valve exhausts the first pneumatic chamber and an open state wherein the valve does not exhaust the first pneumatic chamber. The exhaust valve is operatively coupled to a control circuit which is adapted to place the exhaust valve in its exhaust state when the brake control member is operated.
Borges Elias C.
Costa Jack
LandOfFree
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