Snow blower

A snow blower or snow thrower is a machine for removing snow from an area where it is not wanted, such as a driveway, sidewalk, roadway, railroad track, ice rink, or runway. The misnomer "snow blower" is often used, as the snow is moved using an auger or impeller instead of blowing it. It can use either electric power (line power or battery), or a gasoline or diesel engine to throw snow to another location or into a truck to be hauled away. This is in contrast with the action of snow plows, which push snow to the front or side.

Snow blowers range from the very small, capable of removing only a few inches (a few cm) of light snow in an 18 to 20 in (457 to 508 mm) path, to the very large, mounted onto heavy-duty winter service vehicles and capable of moving 20-foot (6.10 m) wide, or wider, swaths of heavy snow up to 6 feet (1.83 m) deep.

Snow blowers can generally be divided into two classes: single-stage and two-stage. On a single-stage snow blower, the auger (the paddle mechanism visible from the front) pulls snow into the machine and directs it out of a discharge chute. The auger contacts the ground, making single-stage snow blowers unsuitable for use on unpaved surfaces. On a two-stage snow blower, the auger pulls snow into the machine and feeds it into a high-speed impeller, which in turn directs it out of a discharge chute. Two-stage snow blowers can generally handle deeper snow depths than single-stage ones, and because their augers don't touch the ground, they can be used on unpaved surfaces.

Robert Carr Harris of Dalhousie, New Brunswick patented a "Railway Screw Snow Excavator" in 1870. In 1923, Robert E. Cole patented a snowplow that operated by using cutters and a fan to blow snow from a surface. Various other innovations also occurred. However, it is Arthur Sicard (1876–1946) who is generally credited as the inventor of the first practical snow blower. In 1925 Sicard completed his first prototype, based on a concept he described in 1894. He founded Sicard Industries in Sainte-Thérèse, Quebec and by 1927 his vehicles were in use removing snow from the roadways of the town of Outremont, now a borough of Montreal. His company is now a division of SMI-Snowblast, Inc. of Watertown, New York.

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