Farm implement and control structure for wing sections thereof

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:
• an extensible device pivotally interconnecting said link and the other of said sections for raising the one section about said hinge means to a transport and storage position;
• a force-transmitting lever normally extending upwardly from one other section and provided with a trunnion;
• means pivotally coupling the lever with the link;
• a trunnion-supporting carriage,
• said lever being swingable relative to the carriage in response to extension and retraction of said device;
• and
• means on said other section supporting the carriage for reciprocable movement during said extension and retraction of the device.

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.

In a farm implement:

• a first tool-supporting section;
• a second tool-supporting section;
• an articulated joint between the sections;
• a power device for lifting the first section and swinging the latter to a folded position overlying the second section;
• means pivotally coupling one end of the power device with said second section, means pivotally connecting the opposite end of the power device with said first section,
• said connecting means including:
• a lift link provided with a normally lowermost end having pivot means connected with said first section, and
• a force-transmitting lever having a normally uppermost end provided with a pivot pin connecting the lever with the normally uppermost end of the lift link,
• said pivot pin pivotally connecting the opposite end of the power device with the lift link and the lever;
• a reciprocable support underlying the lever;
• guide means carried by the second section beneath the power device and disposed to guide the support for rectilinear reciprocable movement along the second section toward and away from said joint;
• and
• a trunnion at the normally lowermost end of the lever pivotally connecting the latter with said support,
• said guide means having a fulcrum beneath the trunnion about which the lever turns during initial lifting of the first section toward said folded position.