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US 4,825,570 AGranted
Lift system for front-mounted implements for lawn and garden tractors
AssigneeDeere & Company
InventorsSteven L. Schmid, Larry D. Hining
Life of this patent
Estimating the term…
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AssigneeDeere & Company
InventorsSteven L. Schmid, Larry D. Hining
Estimating the term…
A front-mounted snowblower is pivotally attached to a midmount location at the underside of a tractor frame by a pair of lift arms that extend between the tractor front wheel. A rockshaft is pivotally attached to the snowblower at a location forwardly of the tractor and is linked to brackets carried by the tractor axle. The rockshaft includes a transversely offset arm to which the forward end of a lift link is coupled, the rear end of the lift link being coupled to a lift handle located beside the tractor operator station and secured to the outer end of a support bracket fixed to rear end portions of the lift arms. The mounting of the handle to the bracket releases the handle from the bracket upon the handle being swung forwardly beyond a normal working range thereby permitting the implement lift arms to be moved between the tractor front wheels during attachment and detachment operations.
In a front-mounted implement including a working element support frame, a pair of elongate transversely spaced lift arms having forward ends fixed to the support frame and a quick-attach coupling means mounted to rear ends of the lift arms, with the implement being adapted for attachment to a lawn and garden tractor such that the support frame is in front of the tractor, the lift arms extend beneath the tractor and the coupling means pivotally mounts the lift arms to the tractor for swinging about a horizontal, transverse pivot axis, an improved lift system comprising:
In combination with a lawn and garden tractor including a main frame formed at least in part by a pair of transversely spaced, longitudinally extending frame members supported on rear and front pairs of wheels with the front pair being carried at opposite ends of a transverse axle mounted to a bracket, joining forward portions of the pair of frame members, for swinging about a horizontal longitudinal axis and an operator's station including a seat located between the rear pair of wheels, a front-mounted implement, comprising:
The combination defined in claim 11 and further including releasable latch means for preventing the handle from moving outwardly relative to the lift handle support bracket outer end when the handle is swinging in a working range of movement commensurate with that necessary for effecting movement of the working element support structure between its raised and lowered positions but for releasing the handle, upon disconnection of the lift link from and forward swinging of the handle beyond its working range, for sideways movement for separating the handle from the handle support bracket.
Dependencies are inferred from the claim text.