Harvesters – Gang
Patent
1979-08-27
1981-12-08
Hafer, Robert A.
Harvesters
Gang
56 135, 56 171, 280443, A01D 7530
Patent
active
043040861
ABSTRACT:
An independently powered mowing attachment for small or medium sized lawn and garden tractors of the low profile type having a rotary mower mounted on the underside of the tractor frame. The attachment has spaced mower assemblies that cut swaths on both sides of the tractor mowers central cut. The mower attachment includes a frame pivotally connected to the tractor drawbar having rear wheels that steer as the tractor turns to assure that the mower assemblies follow and overlap the swath of the leading tractor mounted mower.
Each mower assembly is pivotally mounted about a horizontal axis at one side of the attachment frame and has three rotary cutting blades driven by an internal combustion engine mounted centrally on the frame. Two hydraulic actuators are provided for raising and lowering the mower assemblies either simultaneously prior to transort and use, or independently when an obstruction is encountered on one side of the cutting path.
The attachment mounted engine also drives a hydrostatic drive that is used to rotate the blades in the tractor mounted mower to remove the mower blade as a load on the tractor engine.
REFERENCES:
patent: 2579118 (1951-12-01), Land
patent: 3329225 (1967-07-01), Dunn
patent: 3514126 (1970-05-01), Fuss
patent: 3608284 (1971-09-01), Erdman
patent: 3717981 (1973-02-01), Lely
patent: 4135349 (1979-01-01), Schwertner
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