Abstract A radiator fan for earth moving equipment, in which air is blown through the radiator, said fan being designed to remove most of the rock and dirt from the air before the air is blown through the radiator, so as to prevent damage to the radiator core. The trailing edges of the fan blades are curled around on the side facing the radiator, so that stones or dirt are caught by the curled portion and accelerated in a circular path around the axis of the fan, causing the debris to be thrown radially outward by centrifugal force. The centrifugally thrown sand and dust particles are caught by a shroud surrounding the fan, and are then picked up and carried forwardly through the radiator core at relatively low velocity by the turbulent air outside the main blast of the fan.
In the combination of a radiator core of an internal combustion engine and a pusher-type fan having a hub and angularly spaced blades thereon for blowing a stream of air through the radiator core; the improvement to minimize damage to the radiator core by solid particles entrained in the airstream comprising: at least one of said blades having a surface adjacent the trailing edge thereof projecting in the direction of the flow of the airstream and facing in the direction of rotation of the blade to catch solid particles in its path of rotation to accelerate them in the direction of rotation of the blade and thus cause the particles to be thrown radially outward from the blade by centrifugal force.
Claim 2
Dependent Claim
121 words
In the combination of a radiator core of an internal combustion engine and a pusher-type fan having a hub and angularly spaced blades thereon for blowing a stream of air through the radiator core; the improvement to minimize damage to the radiator core by solid particles entrained in the airstream comprising: at least one of said blades having a surface adjacent the trailing edge thereof projecting in the direction of the flow of the airstream and facing in the direction of rotation of the blade to catch solid particles in its path of rotation to accelerate them in the direction of rotation of the blade and thus cause the particles to be thrown radially outward from the blade by centrifugal force.
Claim 3
Dependent Claim
26 words
An improvement as set forth in claim 1 in which said surface is the surface of a bent portion of the trailing edge of the blade.
Claim 4
Dependent Claim
31 words
An improvement as set forth in claim 2 in which said bent portion is arcuate in transverse cross-section with its concave side facing in the direction of rotation of the blade.
Claim 5
Dependent Claim
23 words
An improvement as set forth in claim 1 which includes means surrounding the fan to intercept particles thrown off centrifugally by the fan.