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US 7,596,892 B2Granted
Blade for a snow plough
AssigneeHagie Manufacturing Company
InventorMauno Ruuska
Life of this patent
Estimating the term…
Abstract
A blade (3) meant to work in the curved form of a snow plough and attached from its lower edge to a rigid beam, the upper edge of which is supported by means of upper beam (12) or similar, and said blade is of flexible material, as plastic sheet. The blade is from its upper beam (12), essentially from its middle, supported by suspension means (9), which due to the ploughing load allows upper beam (12) and blade (3) upper edge to tilt and blade (3) to change the radius of curvature at least from the suspension spot on the blade area toward the blade point.
Claims7
A snow plough comprising:
- a snow blade made of a flexible material and which works in a curved form, the snow blade having a lower edge, an upper edge, and a radius of curvature between the lower edge and the upper edge;
- and
- a suspension for the snow blade including
- a body,
- a rigid lower beam fixed to the lower edge of the snow blade and to the body,
- an upper beam supporting the upper edge of the snow blade,
- a suspension means secured to the body for suspending the snow blade from the upper beam essentially from only a near-middle suspension spot of the snow blade and for allowing the upper beam and the upper edge of the snow blade to tilt relative to the body depending on a dynamic plowing load experienced by the snow blade and hence for allowing the snow blade to dynamically change the radius of curvature at least of a blade portion extending downwardly from the suspension spot toward the lower edge.
4 more elements
Dependencies are inferred from the claim text.