Abstract: A vehicle engine enclosure includes a tractor frame which supports an engine. A cooling system is mounted on the frame. The cooling system has a housing which surrounds cooling components. A hood is mounted on the frame and encloses the engine and the cooling system. The hood includes a top panel and left and right hood side panels. The top panel has outlet vents formed therein. A pair of left and right side plates are mounted on the frame. A rear end plate covers a rear end of the hood. A plurality of seals are placed between these components so that a duct is formed which collects hot air and moves it vertically through the vents to prevent re-ingesting of the hot air.

Abstract: A fender mounting assembly is provided for a vehicle steerable wheel. The fender mounting assembly includes a base mounted on the axle and a support pivotally coupled to the base about a pivot axis which is aligned with the kingpin axis. A bumper arm projects from the support. A stop support with a curved arm is fixable at different positions on the axle, and a stop member is fixable at different positions on the arm. The stop member is engagable with the bumper arm to limit pivoting of the fender. The base has a cylindrical pivot pin which is aligned with the kingpin axis. The support has a bearing housing which receives an annular bearing, and the annular bearing receives the pivot pin. A torsion spring is coupled between the base and the support. The fender mounting assembly allows the fender to rotate relative to the wheel. The fender pivot axis is coincident with the kingpin axis and includes stops which can be set in a range of positions to prevent unwanted fender rotation.

Abstract: A vehicle front drive assembly includes an auxiliary drive assembly for a vehicle which is driven by an engine which is cooled by a fan. The auxiliary drive assembly includes an input pulley for receiving torque from the engine, a fan drive pulley, a belt engaging the input pulley and the drive pulley and an auxiliary drive housing. The housing supports the belt and has a first opening adapted to receive a torque transmitting member which transmits torque from the engine to the input pulley. The housing has a second opening which receives a fan drive shaft which transmits torque from the fan drive pulley to the fan.

Abstract: A vehicle front drive assembly includes a housing supporting a plurality of belt driven pulleys, including an input pulley driven by an engine of the vehicle, a first driveshaft, a front PTO drive, and a second driveshaft. The first driveshaft can be connected directly between the engine and the input pulley. The front PTO drive has a housing rotatably supporting an input member, an auxiliary drive member and a PTO driveshaft, and enclosing a PTO transmission. A second driveshaft can be coupled between the engine and the auxiliary drive member. The first driveshaft is removable from the assembly when the second driveshaft and the front PTO drive are connected between the engine and the input pulley. The second driveshaft and the front PTO drive are removable from the assembly when the first driveshaft is connected between the engine and the input pulley.

Abstract: An axial flow fan assembly includes a plurality of fan blades surrounded by a shroud. The shroud includes an annular first wall which extends radially outwardly, an annular second wall which extends axially and radially outwardly, and an annular third wall which joins the first wall to the second wall. The third wall has a curved cross sectional shape, and has a minimum diameter part which is positioned approximately half-way between the upstream and downstream edges of the fan blades. There is a desired relationship between the radius of curvature of the third wall and the diameter of the fan. There is a desired relationship between the height of the first wall and the diameter of the fan. The fan blades have an upstream edge which is upstream with respect to the first wall. The third wall has a minimum diameter part which is positioned approximately half-way between the upstream and downstream ends of the fan.

Abstract: A stable, safe, lightweight modular play structure for encouraging and supporting ambulatory motion by one or more infants and which may be selectively assembled in a variety of configurations in an enclosed, modular unit

Abstract: A cooling system is provided for a vehicle having an engine. The cooling system includes an engine cooling radiator positioned in front of the engine, a radiator fan for moving air through the radiator, a duct fro conducting air blown through the radiator, and a pair of subsystem heat exchangers, each with an electric motor driven fan. The duct has a forward opening inlet receiving warmed air from the radiator, a housing extending substantially upwardly from the inlet to an upwardly opening outlet. The heat exchangers are positioned higher than the radiator, and adjacent to and in front of the outlet of the duct. The radiator fan may be mounted in front of the radiator, or it may be mounted inside the duct outlet. An air cleaner unit may be positioned higher than and forward of the radiator and lower than the heat exchangers.

Abstract: A cooling system is provided for a vehicle having an engine. The cooling system includes a pair of heat exchangers, such as an oil cooler and a charge air cooler, laterally spaced apart from each other and located in front of a front end of the engine. A pair of blower units are in front of the coolers and blow cooling air rearwardly therethrough. A pair of duct units are located above the engine and to the rear of the coolers. Each duct unit includes a forward opening inlet receiving warmed air from the corresponding cooler, an upwardly opening outlet and a hollow housing extending from the inlet to the outlet. The outlets are spaced laterally apart from each other. A radiator is positioned above the duct unit housings and forward of the outlets. A set of radiator fans blow air upwardly through the radiator and are positioned between the radiator and the duct housings.

Abstract: An exhaust gas recirculation (EGR) system is provided for an internal combustion engine having a combustion air intake circuit, an exhaust manifold, and an exhaust circuit for communicating engine exhaust to the environment. The EGR system includes an air-to-gas EGR cooler, an air supply conduit for supplying inlet air to the EGR cooler, an EGR supply conduit for communicating exhaust from the exhaust circuit to the EGR cooler, and an EGR outlet conduit communicating cooled EGR from the EGR cooler to the intake circuit. The EGR system also includes a venturi unit in the exhaust circuit, and an air outlet conduit communicating heated air from the EGR cooler to the venturi unit. Flow of exhaust through the venturi creates a pressure which draws cooling air through the EGR cooler. A valve controls flow through the outlet conduit as a function of a sensed temperature in the intake circuit.

Abstract: A cooling system is provided for a vehicle having an engine. The cooling system includes an engine cooling radiator positioned in front of the engine, a radiator fan for moving air through the radiator, a duct fro conducting air blown through the radiator, and a pair of subsystem heat exchangers, each with an electric motor driven fan. The duct has a forward opening inlet receiving warmed air from the radiator, a housing extending substantially upwardly from the inlet to an upwardly opening outlet. The heat exchangers are positioned higher than the radiator, and adjacent to and in front of the outlet of the duct. The radiator fan may be mounted in front of the radiator, or it may be mounted inside the duct outlet. An air cleaner unit may be positioned higher than and forward of the radiator and lower than the heat exchangers.