HIGH SPEED RUNWAY SNOWBLOWER
A snowblower for removing snow from a paved surface, such as roadways and airport runways. The snowblower includes a blower assembly having a blower housing that encloses a pair of rotating side augers and a rotating impeller. The blower housing includes an upper hood. The upper hood is angled from a trailing edge to a leading edge such that the angled upper hood provides enhanced visibility of the operator of the snowblower. Each of the side augers is driven by a hydrostatic drive motor that is positioned above the upper hood to remove the drive motors from within the open interior of the blower housing. The drive motors are driven from a power source separate from the power source used to rotate the impeller. The lower, leading edge of the blower housing includes a V-shaped lower edge to further enhance the direction of snow into the blower housing.
The present application is based on and claims priority to U.S. Provisional Patent Application Ser. No. 61/438,466 filed on Feb. 1, 2011.
BACKGROUNDThe present disclosure generally relates to a high speed snowblower. More specifically, the present disclosure relates to a high speed runway snowblower that includes a pair of augers positioned on opposite sides of a center impeller that allows the snowblower to remove snow from a paved surface, such as a roadway, or runway at relatively high speeds.
High speed snowblowers are particularly useful in clearing long stretches of pavement, such as an airport runway. In a typical application, multiple plows or rotating brooms are used to direct snow toward the side of a runway. A snowblowing machine is then used to move the piled snow away from the runway and onto the infield of the airfield.
Presently, plows and brooms can be operated at speeds much higher than the speed at which currently available truck-mounted snowblowers can remove the snow from the runway. Thus, the snowblowing equipment is the limiting factor for the amount of time needed to remove snow from a runway.
SUMMARYThe present disclosure generally relates to a snowblower for removing snow from paved surfaces, such as roads, or runways. The snowblower of the present disclosure includes a blower assembly having a pair of rotating side augers that direct snow toward a center impeller. The center impeller rotates and throws snow into a volute assembly which then directs snow out of a discharge chute.
The blower assembly includes a blower housing that defines an open interior defined at a top end by an upper hood extending between a pair of sidewalls. The upper hood defines the top edge of the blower housing and extends from a leading edge to a trailing edge. When installed on the blower assembly, the upper hood of the present disclosure decreases in height from the trailing edge to the leading edge to provide enhanced visibility for the driver of the vehicle to which the blower assembly is mounted.
Each of the side augers is driven by a hydrostatic drive motor. In accordance with the disclosure, the hydrostatic drive motor for each of the side augers is positioned outside of the open interior defined by the blower housing and thus above the upper hood. By moving the hydrostatic drive motors for each of the side augers outside of the open interior of the blower housing, the blower assembly reduces the amount of snow that is thrown into contact with the hydrostatic drive motors.
The lower leading edge of the blower assembly is V-shaped and each side is angled from one of the sidewalls to a center apex. The V-shaped lower leading edge of the blower assembly further directs snow toward the rotating center impeller.
The center impeller is driven by an auxiliary diesel engine contained on the drive vehicle. The auxiliary diesel engine provides power for only the center impeller while a separate diesel chassis engine on the vehicle provides the hydraulic pressure to drive each of the vertical side augers.
A back plate contained within the blower housing is angled toward the center impeller to further direct snow toward the center impeller.
Various other features, objects and advantages of the invention will be made apparent from the following description taken together with the drawings.
The drawings illustrate the best mode presently contemplated of carrying out the disclosure. In the drawings:
The blower assembly 12 is mounted to the front end 18 of the vehicle 14 through a mechanical linkage 20 that allows the operator of the vehicle to lift the blower assembly 12 off of the ground when desired. The blower assembly 12 includes a pair of caster wheels 22 and a front, lower leading edge 30 of the blower assembly. The height of the front, lower leading edge 30 is adjustable through adjustments to the caster wheels 22.
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Specifically, the lower auger blade 72 is configured such that rotation of the side auger causes the lower auger blade 72 to direct snow upward and toward the center of the open interior 25 for discharge by the rotating impeller 34. The upper auger blades 70 have a different configuration and are designed to fling snow toward the center of the open interior and away from the upper hood 28. The function of both the upper and lower auger blades 70, 72 is to direct snow away from the sidewalls 26 and toward the center of the open interior 25. Further, both of the auger blades 70, 72 are configured to direct snow toward the rotating impeller for discharge. Since the snowblower assembly 12 of the present disclosure is typically used in clearing large runways, it is important for all of the snow from the runway to be removed during a single pass of the snowblower. Thus, the pair of rotating side augers 32 function to direct snow that may not initially be removed by the rotating impeller 34 back into contact with the rotating impeller for ultimate removal.
As described, the longitudinal shape of the bottom section of the snowblower enclosure is angular such that the snow is directed from the pavement surface to the impeller 34 located at the rear of the blower housing 24. Likewise, the snow that enters the blower housing 24 on opposite sides of the impeller 34 is directed upward and toward the center of the blower housing 24 by the side augers 32, where the snow is ingested by the impeller 34. Since the snow is handled by both the side augers 32 and the center impeller 34, some turbulence is created, and a certain amount of residual snow that does not immediately exit the snowblower enclosure through the volute assembly 38 and discharge chute 36 may otherwise be thrown out the front or sides of the snowblower enclosure. As shown in
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Specifically, as the snowblower vehicle moves in a forward direction on a snow-filled runway, there is a natural tendency for some of the snow to otherwise get pushed to the sides of the blower assembly. In addition, a certain amount of snow being handled by the side augers and the center impeller has a tendency to be pushed forward and out of the blower housing. The pair of side frame extensions 74 function to increase the physical volume of the snow that can be held within the open interior 25 of the blower housing to keep snow contained within the blower housing to be processed by the rotating impeller. The front frame extensions 74 can be easily removed by maintenance personnel if desired. As described above, the upper hood 28, the center and side snow shields 60, 62 and the side frame extensions 74 work together to contain snow within the interior 25 of the blower housing while the snow blower is traveling in a forward direction, thereby increasing overall performance and reducing the amount of residual snow that is left on the runway surface during the snow removal operation. We claim:
Claims
1. A vehicle-mounted snowblower assembly for removing snow from pavement, comprising:
- a blower housing having a pair of spaced sidewalls and an upper hood extending between the sidewalls to define an open interior that receives snow to be removed;
- a rotating impeller extending through a back wall of the blower housing and into the open interior to receive the snow to be removed,
- wherein the upper hood has a width defined between a leading edge and a trailing edge, wherein the upper hood is downwardly declined from the trailing edge to the leading edge.
2. The snowblower of claim 1 wherein the height of the trailing edge of the upper hood above a ground surface is approximately equal to a diameter of the impeller when the snowblower assembly is supported on the ground surface.
3. The snowblower of claim 2 wherein the height of the leading edge of the upper hood above the ground surface is less than the diameter of the impeller when the snowblower assembly is supported on the ground surface.
4. The snowblower of claim 1 wherein the blower housing includes a leading edge extending between the pair of sidewalls, wherein the leading edge has a generally V-shape having an apex positioned between the two sidewalls.
5. The snowblower of claim 1 wherein the width of the upper hood between the leading edge and the trailing edge is approximately constant.
6. The snowblower of claim 1 further comprising:
- a pair of side augers mounted within the open interior on opposite sides of the rotating impeller; and
- a pair of drive motors each coupled to one of the side augers, wherein the drive motors are operable to rotate one of the side augers.
7. The snowblower of claim 6 wherein the drive motors are each mounted above the upper hood and outside of the open interior of the blower housing.
8. The snowblower of claim 1 further comprising a pair of side frame extensions each attached to one of the sidewalls, wherein each of the side frame extensions extends past the leading edge of the blower housing.
9. A vehicle-mounted snowblower assembly for removing snow from pavement, comprising:
- a blower housing having a pair of spaced sidewalls and an upper hood extending between the sidewalls to define between an open interior that receives snow to be removed;
- a rotating impeller extending through a back wall of the blower housing and into the open interior to receive the snow to be removed;
- a pair of side augers mounted within the open interior on opposite sides of the rotating impeller; and
- a pair of drive motors each coupled to one of the side augers, each of the drive motors being positioned above the upper hood and outside of the open interior of the blower housing.
10. The snowblower of claim 9 wherein each of the drive motors are driven by a power source different from the power source that rotates the impeller.
11. The snowblower of claim 9 further comprising a pair of side frame extensions each attached to one of the sidewalls, wherein each of the side frame extensions extends past the leading edge of the blower housing.
12. The snowblower of claim 9 wherein the blower housing includes a leading edge extending between the pair of sidewalls, wherein the leading edge has a generally V-shape having an apex positioned between the two sidewalls.
13. The snowblower of claim 9 wherein the upper hood has a width defined between a leading edge and a trailing edge, wherein the upper hood is downwardly declined from the trailing edge to the leading edge.
14. The snowblower of claim 13 wherein the height of the trailing edge of the upper hood above a ground surface is approximately equal to a diameter of the impeller when the snowblower assembly is supported on the ground surface.
15. The snowblower of claim 14 wherein the height of the leading edge of the upper hood above the ground surface is less than the diameter of the impeller when the snowblower assembly is supported on the ground surface.
16. A snowblower for removing snow from pavement, comprising:
- a vehicle;
- a blower assembly mounted to the vehicle, the blower assembly including a blower housing having a pair of spaced sidewalls and an upper hood extending between the sidewalls to define an open interior that receives the snow to be removed;
- a rotating impeller extending through a back wall of the blower housing and into the open interior to receive the snow to be removed;
- a pair of spaced side augers mounted within the open interior on opposite sides of the rotating impeller; and
- a pair of drive motors each coupled to one of the side augers, each of the drive motors being operable to rotate one of the side augers, wherein the pair of drive motors are each mounted above the upper hood and outside of the open interior of the blower housing.
17. The snowblower of claim 16 wherein the upper hood has a width defined between a leading edge and a trailing edge, wherein the upper hood is downwardly declined from the trailing edge to the leading edge.
18. The snowblower of claim 16 wherein the height of the trailing edge of the upper hood above a ground surface is approximately equal to a diameter of the impeller when the snowblower assembly is supported on the ground surface.
19. The snowblower of claim 18 wherein the height of the leading edge of the upper hood above the ground surface is less than the diameter of the impeller when the snowblower assembly is supported on the ground surface.
Type: Application
Filed: Jan 31, 2012
Publication Date: Aug 2, 2012
Applicant: WAUSAU EQUIPMENT COMPANY, INC. (New Berlin, WI)
Inventors: Rodney C. Winter (Dousman, WI), Luther E. Esselstrom (St. Francis, WI), Alan Fillman (Racine, WI), Peter Tiffe (Brookfield, WI)
Application Number: 13/362,547
International Classification: E01H 5/07 (20060101);