Roll-over protective system for tractors
First Claim
1. In a tractor having a frame supported on a rear axle;
- an operator'"'"'s seat positioned proximate to said rear axle; and
a roll-over protection apparatus mounted on said rear axle rearwardly of said operator'"'"'s seat, an improved roll-over protection apparatus comprising;
a fixed lower section attached to said rear axle;
a movable upper section alignable with said lower section and movable relative thereto between a raised operative position and a lowered inoperative position; and
a four-bar linkage mechanism connecting said upper section to said lower section to permit said upper section to be pivotally moved relative to said lower section.
2 Assignments
0 Petitions
Accused Products
Abstract
A collapsible roll-over protection system is provided with an upper section pivotally connected to a fixed lower section by a four-bar linkage. The linkage permits the upper section to be pivotally rotated rearwardly of the lower section and lowered to an inoperative position adjacent to and immediately behind the lower section. The pivot linkage includes an apertured tab that registers with a locking opening on the lower section to fix the upper section in the inoperative position. The engagement surfaces of the upper and lower sections is slanted with respect to the axis of the legs of the upper and lower sections to facilitate the movement of the upper section between the operative and inoperative positions. A locking pin fixes the structure in both the positions to prevent loose parts whenever the structure is moved between positions.
59 Citations
16 Claims
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1. In a tractor having a frame supported on a rear axle;
- an operator'"'"'s seat positioned proximate to said rear axle; and
a roll-over protection apparatus mounted on said rear axle rearwardly of said operator'"'"'s seat, an improved roll-over protection apparatus comprising;a fixed lower section attached to said rear axle; a movable upper section alignable with said lower section and movable relative thereto between a raised operative position and a lowered inoperative position; and a four-bar linkage mechanism connecting said upper section to said lower section to permit said upper section to be pivotally moved relative to said lower section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- an operator'"'"'s seat positioned proximate to said rear axle; and
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9. A roll-over protection system for use on vehicles, comprising:
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a fixed lower section attached to said vehicle; a movable upper section alignable with said lower section and movable relative thereto between a raised operative position and a lowered inoperative position; a pair of laterally spaced top links pivotally interconnecting said upper and lower sections; and a pair of laterally spaced bottom links pivotally interconnecting said upper and lower sections, said bottom links being parallel to said top links, said top and bottom links permitting said upper section to be pivotally moved relative to said lower section. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification