Collection device for grass cutting machines
AssigneeElectrolux Northern Limited
InventorKen Dunn
Life of this patent
Estimating the term…
Abstract
A grass cutting machine includes a grass cutter, a motor for driving the grass cutter, a housing for supporting the machine above ground datum, collector for collecting grass cut by cutter, and a fan for establishing a flow of air. The collector for cut grass further includes a duct for directing cut grass entrained in a stream of air from the fan. The duct has a collection mouth at an upstream end thereof and disposed in the region of the ground datum, thereof, and a downstream end of the duct connected to the collector. At least one air-outlet aperture is disposed in the region of the collection mouth, each aperture serving to direct at least a portion of the stream of air downstream from the collection mouth so as to draw into the mouth cut grass and to transport the cut grass through the duct to the collector.
Claims29
A grass cutting machine comprising a grass cutter, a driving source for driving said grass cutter, means for supporting said machine above ground datum, collecting device for collecting grass cut by said grass cutter and a source for establishing a flow of air, the said collecting device comprising a duct having an upstream end and a downstream end, said upstream end having a collection mouth disposed to receive grass cut by said grass cutter, the collection mouth including a plurality of apertures for receiving the flow of air from said source, each aperture including a generally convexly-shaped air flow control surface arranged so that at least a portion of said flow of air follows said control surface to be directed at an angle inclined towards the longitudinal axis of the duct in the downstream direction.
A machine according to claim in which said grass cutter is a cylinder cutter rotatable about a horizontal axis and said means for supporting the machine above ground datum includes, rollers or castors.
A grass cutting machine comprising a housing, a cutting chamber disposed within the housing, a grass cutter rotatably mounted within the cutting chamber, a driving source for driving said grass cutter, means for supporting said machine above ground datum, a collecting device for collecting grass cut by said grass cutter and a source for establishing a flow of air, the said collecting device comprising a duct disposed externally of the cutting chamber having an upstream end and a downstream end, said upstream end having a collection mouth disposed externally of the housing to receive grass cut by said grass cutter and deposited on ground data, the collection mouth including at least one aperture for discharging the flow of air from said source, each said aperture including a generally convexly shaped air flow control surface arranged so that at least a portion of said flow of air follows said control surface to be directed at an angle inclined towards the longitudinal axis of the duct in the downstream direction so that said flow of air draws cut grass into the duct from a position external of the housing.
Dependencies are inferred from the claim text.