Roll-over protection device
First Claim
1. In a tractor of the type having rear hitch means, an operator'"'"'s position, hydraulic power means for lifting the hitch means, and a substantially U-shaped roll-over protection structure including a pair of lateral members secured to the tractor immediately adjacent to the operator'"'"'s position on opposite sides thereof, the improvement comprising:
- means for adjustably mounting the roll-over protection structure to the tractor, said structure being movable between a retracted position in which the roll-over protection structure is substantially horizontal and an erect position in which the roll-over protection structure is substantially vertical; and
means including a rigid link connected between said hydraulic power means and said roll-over protection structure for raising and lowering said roller-over protection structure.
5 Assignments
0 Petitions
Accused Products
Abstract
An improved roll-over protection system for a tractor of the type having a three-point hitch with a hydraulic power lift. A roll-over protection structure is movable between retracted and erect positions and the hydraulic lift of the hitch apparatus is linked to the roll-over protection structure to raise and lower it. The link is either detachable when the structure is in place or has a slotted section allowing the hitch to be lifted without detachment of the link from the roll-over protection structure.
38 Citations
17 Claims
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1. In a tractor of the type having rear hitch means, an operator'"'"'s position, hydraulic power means for lifting the hitch means, and a substantially U-shaped roll-over protection structure including a pair of lateral members secured to the tractor immediately adjacent to the operator'"'"'s position on opposite sides thereof, the improvement comprising:
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means for adjustably mounting the roll-over protection structure to the tractor, said structure being movable between a retracted position in which the roll-over protection structure is substantially horizontal and an erect position in which the roll-over protection structure is substantially vertical; and means including a rigid link connected between said hydraulic power means and said roll-over protection structure for raising and lowering said roller-over protection structure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a tractor of the type having rear hitch means, hydraulic power means for lifting the hitch means, and a roll-over protection structure, the hydraulic power means including a powered horizontal shaft and a rock arm with a driving end affixed to said powered shaft, the rear hitch means including a three-point hitch lower link and a three-point hitch lift link attached to the lower link and extending to a pivot attachment with the rock arm, the improvement comprising:
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means for adjustably mounting the roll-over protection structure to the tractor, said structure being movable between a retracted position in which the roll-over protection structure is substantially horizontal and an erect position in which the roll-over protection structure is substantially vertical; and means for linking said hydraulic power means to said roll-over protection structure to use said hydraulic power means for raising and lowering said structure, said linking means including a link arm pivotably attached to the rock arm at a first point spaced from said driving end and extending to a pivot attachment with the roll-over protection structure. - View Dependent Claims (9, 10, 11)
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12. In a tractor of the type having rear pitch means, hydraulic power means for lifting the hitch means, and a roll-over protection structure, improvement comprising:
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means for adjustably mounting the roll-over protection structure to the tractor, said structure being movable between a retracted position in which the roll-over protection structure is substantially horizontal and an erect position in which the roll-over protection structure is substantially vertical; and means for linking said hydraulic power means to said roll-over protection structure to use said hydraulic power means for raising and lowering said roll-over protection structure, said linking means including a slot arm pivotably attached at one end to the roll-over protection structure and having a slot extending therealong and spaced from the pivot attachment of said slot arm to said roll-over protection structure, said hydraulic power means engaging the slot arm at variable positions in the slot whereby said hydraulic power means can operate the hitch means without detachment of said inking means. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification