초록 ▼

A casing is secured to the front of the radiator air intake of a tractor and a cylindrical screen assembly is journalled for free rotation to the casing. A fan blade assembly is secured to the inner end of the cylindrical screen assembly so that air drawn through the radiator by the engine cooling f

A casing is secured to the front of the radiator air intake of a tractor and a cylindrical screen assembly is journalled for free rotation to the casing. A fan blade assembly is secured to the inner end of the cylindrical screen assembly so that air drawn through the radiator by the engine cooling fan, passes through the fan assembly of the screen assembly and rotates the screen assembly. A blanking plate is supported within the screen assembly which blanks off part of the screen as it passes thereby, so that no air passes into the screen assembly in this area. This releases chaff or other debris normally held on the surface of the screen by suction. The fan blade assembly is provided with small additional blades on the periphery thereof, positioned to generate a slight positive pressure in the annular area betwen the periphery of the fan blade assembly and the casing as the screen assembly rotates, in order to provide an air seal and to prevent any chaff or other debris from being drawn into the radiator around this area.

대표청구항 ▼

A screen assembly for the radiator intakes of the engines of tractors, farm equipment such as combines, trucks and the like comprising in combination support means attachable to the front of the radiator air intake, a substantially cylindrical screen component journalled for rotation upon said suppo

A screen assembly for the radiator intakes of the engines of tractors, farm equipment such as combines, trucks and the like comprising in combination support means attachable to the front of the radiator air intake, a substantially cylindrical screen component journalled for rotation upon said support means whereby substantially all air entering said radiator air intake passes through said screen component, said screen component including air operated means to rotate said screen component in one direction as air passes therethrough and into the radiator air intake and means to substantially seal the area between said support means and said screen component, said last mentioned means including the inner end of said screen component engaging said support means in spaced relationship therefrom thereby defining an annular channel between said support means and the inner end of said screen component, said channel constituting said area between said support means and said screen component, and means formed around the periphery of said screen component, and means formed around the periphery of said inner end of said screen component and positioned to develop positive air pressure within said annular channel directed radially outwardly from the interior of said screen component and through said annular channel, when said screen component is rotating, said means formed around the periphery of said inner end of said screen component comprising a plurality of relatively small blades formed around the periphery of said inner end.