Tool bar control for agricultural implement
First Claim
1. An agricultural implement comprising, in combination,a frame,at least two tool bars supported by said frame for rotation about their longitudinal axes and each carrying at least one ground working tool thereon for movement therewith,wheel means mounted on said frame and movable between a lowered transport position wherein said frame and ground working tools are raised for transport and a raised position wherein said frame and ground working tools are lowered for ground working operation,operator means operatively associated with said wheel means and adapted to move said wheel means between its said lowered and raised positions,and a control mechanism operatively associated with said wheel means and said tool bars so as to effect predetermined rotation of said tool bars when said wheel means is moved between its said lowered and raised positions, said control mechanism including first linkage means interconnecting one of said tool bars to said wheel means so that movement of said wheel means from its said lowered to its said raised positions effects rotation of said one of said tool bars in a predetermined direction,second linkage means intereconnecting the other of said tool bars to said wheel means so that movement of said wheel means from its said lowered to its said raised positions is inoperative to effect rotation of said other of said tool bars through said second linkage means, while movement of said wheel means from its said raised to its said lowered positions is operative to effect rotation of said other of said tool bars through said second linkage means in a direction opposite to said predetermined direction,and third linkage means directly interconnecting said tool bars so that rotation of either of said tool bars effects a corresponding rotation of the other of said tool bars,wherein said first linkage means includes a connector plate mounted on said one of said tool bars for movement therewith, and a pair of actuator links pivotally connected to said connector plate and interconnecting said connector plate to said wheel means, and,wherein each of said actuator links has lost motion connection with said connector plate, one of said actuator links being adapted to effect rotation of said connector plate and said one of said tool bars in said predetermined rotational direction in response to movement of said wheel means from its said lowered to its said raised positions, and the other of said actuator links being adapted to limit the extent of said rotation of said one of said tool bars in said predetermined rotational direction.
6 Assignments
0 Petitions
Accused Products
Abstract
A tool bar control mechanism for an agricultural implement or the like having a frame, a pair of generally transverse tool bars mounted on the frame for rotation about their longitudinal axes and carrying ground working tools such as spring teeth for movement therewith, and transport wheels mounted on the frame and movable between lowered transport positions wherein the frame and ground working tools are raised for transport and raised positions wherein the frame and tools are lowered for ground working operation, the tool bar control mechanism including linkage means operatively interconnecting the transport wheels with the tool bars so as to effect predetermined rotation of the tool bars and ground working tools in response to movement of the transport wheels between their lowered and raised positions and positively maintain the tools in set position during ground working operation.
20 Citations
10 Claims
-
1. An agricultural implement comprising, in combination,
a frame, at least two tool bars supported by said frame for rotation about their longitudinal axes and each carrying at least one ground working tool thereon for movement therewith, wheel means mounted on said frame and movable between a lowered transport position wherein said frame and ground working tools are raised for transport and a raised position wherein said frame and ground working tools are lowered for ground working operation, operator means operatively associated with said wheel means and adapted to move said wheel means between its said lowered and raised positions, and a control mechanism operatively associated with said wheel means and said tool bars so as to effect predetermined rotation of said tool bars when said wheel means is moved between its said lowered and raised positions, said control mechanism including first linkage means interconnecting one of said tool bars to said wheel means so that movement of said wheel means from its said lowered to its said raised positions effects rotation of said one of said tool bars in a predetermined direction, second linkage means intereconnecting the other of said tool bars to said wheel means so that movement of said wheel means from its said lowered to its said raised positions is inoperative to effect rotation of said other of said tool bars through said second linkage means, while movement of said wheel means from its said raised to its said lowered positions is operative to effect rotation of said other of said tool bars through said second linkage means in a direction opposite to said predetermined direction, and third linkage means directly interconnecting said tool bars so that rotation of either of said tool bars effects a corresponding rotation of the other of said tool bars, wherein said first linkage means includes a connector plate mounted on said one of said tool bars for movement therewith, and a pair of actuator links pivotally connected to said connector plate and interconnecting said connector plate to said wheel means, and, wherein each of said actuator links has lost motion connection with said connector plate, one of said actuator links being adapted to effect rotation of said connector plate and said one of said tool bars in said predetermined rotational direction in response to movement of said wheel means from its said lowered to its said raised positions, and the other of said actuator links being adapted to limit the extent of said rotation of said one of said tool bars in said predetermined rotational direction.
- 7. An agricultural implement comprising, in combination, frame means adapted to be attached to a draft vehicle, a rockshaft mounted on said frame means in transverse relation thereto for rotation about its longitudinal axis, wheel means mounted on said rockshaft for movement therewith, actuator means operatively associated with said rockshaft and operative to effect movement of said wheel means between a lowered transport position wherein said frame means is in a raised position relative to ground and a second position wherein said frame means is in a lowered position relative to ground, at least two tool bars mounted on said frame means in transverse relation thereto for rotation about their longitudinal axes, each of said tool bars supporting at least one ground working tool thereon for movement therewith, first linkage means operatively associated with one of said tool bars and said rockshaft and operative to effect predetermined rotation of said one of said tool bars when said wheel means is moved from its said lowered to it said raised positions, second linkage means operatively associated with the other of said tool bars and said rockshaft and being inoperative to rotate said other of said tool bars when said wheel means is moved from its lowered to its raised positions but being operative to rotate said other of said tool bars in a direction opposite to said predetermined rotation when said wheel means is moved from its raised to its lowered position, and third linkage means directly interconnectng said tool bars so that rotation of both of said tool bars is effected in response to rotation of either of said tool bars by said first or second linkage means in response to movement of said wheel means, wherein said first linkage means includes a pair of actuator links, and a connector plate mounted on said one of said tool bars in normal relation thereto, said actuator links each being pivotally connected to said rockshaft and having lost motion connection with said connector plate in a manner so that movement of said wheel means from its said lowered to its said raised positions places one of said actuator links in tension and effects said predetermined rotation of said one of said tool bars, the other of said actuator links being operative to limit the extent of said predetermined rotation of said one of said tool bars when said wheel means is moved to its said raised position.
Specification