초록 ▼

A farm implement has a number of normally horizontal sections for supporting ground-engaging tools, hingedly interconnected such that the outer sections may be folded upwardly and inwardly to a reduced width for transport and storage. A folding assembly separate from the hinges includes a hydraulic

A farm implement has a number of normally horizontal sections for supporting ground-engaging tools, hingedly interconnected such that the outer sections may be folded upwardly and inwardly to a reduced width for transport and storage. A folding assembly separate from the hinges includes a hydraulic piston and cylinder power unit coupled with a lift link that is pivotally connected to a force-transmitting lever which, in turn, acts against a fulcrum during the folding operation. The fulcrum has the second function of serving as one of a pair of limiting stops in a lost motion arrangement for the lever which permits the foldable section to rise and fall in response to uneven terrain. The lever is supported through a trunnion by a carriage which, during folding, is first tilted by the lever to align the trunnion with slotted trunnion guide tracks and then shifted within a slide box by the power unit acting through the trunnion as the last phase of the folding operation takes place.

대표청구항 ▼

In a farm implement: a pair of normally horizontal sections for supporting ground-engaging tool means; hinge means interconnecting the sections for up and down swinging movement of one of said sections; a lift link pivotally attached to said one section and normally extending upwardly therefrom; a c

In a farm implement: a pair of normally horizontal sections for supporting ground-engaging tool means; hinge means interconnecting the sections for up and down swinging movement of one of said sections; a lift link pivotally attached to said one section and normally extending upwardly therefrom; a carriage; a force-transmitting lever pivotally attached to said carriage and normally extending upwardly therefrom; said link and lever converging as their normally uppermost ends are approached; and power means pivotally connected with the other of said sections and with said uppermost ends of the link and lever, said carriage being supported by said other section for movement away from said one section as the power means swings the link and the lever to a position folding the one section into overlying relation to the other section.