Snow blower

Claim 1

A BLOWER FOR SNOW AND OTHER GRANULAR MATERIAL COMPRISING A CYLINDRICAL HOUSING HAVING A BOTTOM WALL AND OPENED AT ITS FRONT END FOR RECEIVING MATERIAL TO BE EJECTED, A SHAFT ROTATABLY MOUNTED WITHIN SAID HOUSING AND COAXIAL THEREWITH, ANGULARLY SPACED VANES RIGIDLY SECURED TANGENTIALLY TO SAID SHAFT AT THEIR RADIALLY INNER END, THE OUTER ENDS OF SAID VANES BEING SLIGHTLY SPACED FROM THE CYLINDRICAL WALL OF SAID HOUSING, AND SUBTENDING AN ANGLE VARYING BETWEEN FOUR AND FOURTEEN DEGREES WITH A LINE JOINING THE EXTERNAL END OF SAID VANE TO THE AXIS OF SAID SHAFT, AND AN EJECTION TUBE SECURED TO AND IN COMMUNICATION WITH THE CYLINDRICAL WALL OF SAID HOUSING, SAID TUBE HAVING AN UPSTREAM WALL WITH RESPECT TO THE DIRECTION OF ROTATION OF SAID VANES WHICH IS INCLINED IN A DIRECTION CONTRARY TO SAID DIRECTION OF ROTATION AT AN ANGLE DEFINED BY SAID UPSTREAM WALL AND A LINE TANGENTIAL TO THE JUNCTION OF SAID UPSTREAM WALL WITH SAID CYLINDRICAL WALL, SAID LAST NAMED ANGLE BEING EQUAL TO THE ANGLE SUBTENDED BY SAID VANES AS DEFINED HEREINABOVE, WHEREBY EACH VANE UPON REACHING A POSITION AT THE JUNCTION OF SAID UPSTREAM WALL WITH SAID CYLINDRICAL WALL OF SAID HOUSING IS IN A PLANE SUBSTANTIALLY PERPENDICULAR TO SAID UPSTREAM WALL OF SAID TUBE.