초록 ▼

An improved single stage snowthrower includes a housing with an open front portion, the housing including two side walls, a rear wall therebetween and a discharge chute. The rear wall includes deflecting ledges that angle upwardly toward the discharge chute, inwardly toward the center of the housing

An improved single stage snowthrower includes a housing with an open front portion, the housing including two side walls, a rear wall therebetween and a discharge chute. The rear wall includes deflecting ledges that angle upwardly toward the discharge chute, inwardly toward the center of the housing and forwardly toward the open front. The deflecting ledges provide both an inward and an upward component to snow travelling in the housing. The snowthrower also includes an impeller having axial ends and a radial edge. The impeller is comprised of two molded identical body sections that are joined about a shaft. Each body section includes a central portion, two end portions and a pair of helical portions with one helical portion between each end portion and the central portion. A portion of the radial edge of the impeller includes a shovel-like projection that is oriented in a direction extending laterally away from the impeller in the direction of rotation of the impeller.

대표청구항 ▼

[ We claim:] [1.] A snowthrowing impeller assembly comprising:a rotatable shaft;an impeller including first and second non-planar body sections, each of said body sections being pre-shaped to have a configuration including a pair of axial ends, a central portion, a spiral portion positioned between

[ We claim:] [1.] A snowthrowing impeller assembly comprising:a rotatable shaft;an impeller including first and second non-planar body sections, each of said body sections being pre-shaped to have a configuration including a pair of axial ends, a central portion, a spiral portion positioned between said central portion and each of said axial ends and a mounting member positioned adjacent said central portion and each of said spiral portions; anda fastener for clamping each of said mounting members to said shaft so that said impeller is rotatable with said shaft.