Patent ID: 7963547

Claim:
A transport vehicle configured to transport a load including: a front vehicle frame; a front vehicle wheel assembly operably coupled to the front vehicle frame, the front vehicle wheel assembly providing rolling support for the front vehicle frame; a trailer including a trailer frame; a trailer wheel assembly operably coupled to the trailer frame, the trailer wheel assembly providing rolling support for the trailer frame, the trailer wheel assembly including a trailer tandem pivotally coupled to the trailer at a tandem pivot coupling, a front trailer tandem wheel rotatably coupled to the trailer tandem of the trailer wheel assembly to provide rolling support of the trailer tandem of the trailer wheel assembly, and a rear trailer tandem wheel rotatably coupled to the trailer tandem of the trailer wheel assembly to provide rolling support of the trailer tandem of the trailer wheel assembly; a load bin supported by the trailer frame, the load bin being configured to support a load transported by the transport vehicle; a center of gravity; and at least two lines of action defining a stability region therebetween; a transport vehicle frame coupling between the front vehicle frame and the trailer frame, the transport vehicle frame coupling being configured to provide pivoting movement between the front vehicle frame and the trailer frame about a vertical pivot axis; a transport vehicle condition sensor, the transport vehicle condition sensor being configured to detect a condition of the transport vehicle; a transport vehicle controller, the transport vehicle controller being in communication with the transport vehicle condition sensor; and a transport vehicle stabilizer operably coupled to the trailer frame and the trailer tandem, the transport vehicle stabilizer including a fluid cylinder configured to restrict pivoting movement of the transport vehicle tandem of the second transport vehicle wheel assembly in response to the condition of the transport vehicle sensed by the transport vehicle condition sensor, a fluid pump, the fluid pump being configured to supply fluid under pressure, at least one fluid valve including a valve housing and a valve member positioned within the valve housing to control the flow of fluid, and at least one fluid line, the at least one fluid line communicating fluid between the fluid cylinder, the fluid pump, and the at least one fluid valve, the at least one fluid valve being configured to control the position of at least one of the lines of action to control the size of the area of the stability region.