초록 ▼

An agricultural implement is provided with a forward folding tool bar that is pivotally mounted on the draw bar for rotation about a transverse pivot axis as part of the folding and unfolding of the tool bar. The tool bar is provided with a tower apparatus having a passageway therethrough for alignm

An agricultural implement is provided with a forward folding tool bar that is pivotally mounted on the draw bar for rotation about a transverse pivot axis as part of the folding and unfolding of the tool bar. The tool bar is provided with a tower apparatus having a passageway therethrough for alignment with pivot linkages for providing a floating movement of the pivotally mounted wing members with the wing fold actuators forming a rigid link in the pivot linkages. An unfold finger is mounted on the draw bar where the tower mechanism would be positioned upon the rotation of the tool bar into an intermediate transport position such that the unfold finger is positionable within the passageway through the tower apparatus. The unfold finger is spring-biased and incorporates lost movement slots to allow the unfold finger to yield when the passageway is blocked as the tower apparatus is moved over the unfold finger. Once engaged within the tower apparatus, the unfold finger provides a stop against which the pivot linkages push when the wing fold actuators are utilized to unfold the wing members, but is retracted from the passageway whenever the tool bar is rotated into a working position.

대표청구항 ▼

[ Having thus described the invention, what is claimed is:] [1.] In an agricultural implement supporting ground working devices, said agricultural implement having a draw bar adapted for connection to a prime mover; and a tool bar connected to said draw bar and including left and right wing members

[ Having thus described the invention, what is claimed is:] [1.] In an agricultural implement supporting ground working devices, said agricultural implement having a draw bar adapted for connection to a prime mover; and a tool bar connected to said draw bar and including left and right wing members pivotally movable about a wing pivot axis relative to said draw bar, each of said wing members having a wing actuator effecting said pivotal movement of said wing members so as to be movable between a laterally extending operating position and a forwardly folded transport position, said wing pivot axes extending in a fore-and-aft direction when said wing members are in said operating position so that pivotal movement of said wing members will allow a floating movement of said wing members for following changing ground contours, the improvement comprising:a pivot linkage connected to each said wing actuator and interconnecting each said wing member and said draw bar to allow said floating movement of said wing member while holding said wing actuator as a rigid link;a tower apparatus having a laterally extending passageway therethrough in alignment with said pivot linkage, an upward said floating movement of said wing members causing said pivot linkage to enter said tower apparatus through said passageway; andan unfold finger mounted on said drawbar and being positionable within said passageway to block said passageway when said wing members are moved into said transport position, said unfold finger being movably mounted on said draw bar to avoid interference under circumstances where said passageway is blocked as said unfold finger is moved into said passageway.