Snow blowers
Assignee9095-2805 QuéBec Inc.
InventorRaynald TURCOTTE
Life of this patent
Estimating the term…
Abstract
The snow blower generally has a tip fence being annular in shape, the tip fence protruding radially from the cylindrical wall adjacent the front edge of the blades and spanning at least a portion of the circumference of the cylindrical wall, and blades having front edges radially clearing the tip fence by at most half of the first radial dimension. The snow blower can have blades with an oblique edge extending radially inwardly from the front edge and extending rearwardly, the oblique edge forming an angle greater than 25° relative to the impeller axis. The snow blower can have blades with front edges forming an angle of at least 85° relative to the corresponding tips.
Claims12
A snow blower comprising:
- a primary housing having a back wall extending laterally and upwardly and two side walls extending forwardly from opposite lateral ends of the back wall, the back wall having an opening;
- an auger mounted between the side walls, in the primary housing, and rotatable around an auger axis extending between the side walls, to move snow in the primary housing towards the opening, the auger having a flight in the form of a helical pushing segment, the flights being provided with angularly disposed oars which form an acute angle relative to the flight;
- a secondary housing recessed from the back wall and open to the primary housing via the central opening, the secondary housing having a cylindrical wall having a tangential opening;
- an impeller rotatably mounted in the secondary housing around an impeller axis coinciding with an axis of the cylindrical wall, the impeller axis forwardly oriented, the impeller having a plurality of impeller blades circumferentially interspaced from one another, the blades having a tip adjacent to the cylindrical wall and a front edge having a first radial dimension;
- and
- a chute extending tangentially relative the impeller axis, from the tangential opening of the secondary housing.
The snow blower of claim 21 wherein the front edges of the blades radially clear the tip fence by a third of the first radial dimension.
The snow blower of claim 21 wherein the front edges of the blades radially clear the tip fence by at least a quarter of the first radial dimension.
The snow blower of claim 21 wherein the cylindrical wall has a given diameter, the tip fence having a second radial dimension corresponding to the given diameter divided by a given number, the number varying between 12 and 20.
-20. (canceled)
Dependencies are inferred from the claim text.