B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
B60T 15/48 (2006.01) B60T 13/26 (2006.01) B60T 15/22 (2006.01)
Patent
CA 2126256
A full function brake valve far a semi-trailer is contained within a single housing and provides ports for receiving supply air and control air, and for delivering and receiving air from reservoirs, service brakes and spring brakes, and delivering air to an exhaust. The internal valves include a pressure protection valve which communicates with, a first check valve and a quick release valve to pressurize spring brake chambers, and a reservoir check valve and a relay valve to respectively pressurize a reservoir and to deliver supply air to service brakes. An orifice preferably provided in a second check valve permits partial air flow to the spring brakes to release the spring brakes for towing the vehicle.
Koelzer Robert L.
Wallestad Steven D.
Haldex Brake Corporation
Perley-Robertson Hill & Mcdougall Llp
LandOfFree
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