Transport lock system for an implement or the like

Claim 1

In an implement or the like having a frame, transport wheel means mounted on the frame and movable between a lowered transport position wherein the frame is raised for transport and a raised position wherein the frame is lowered for an operating mode, and actuating means including a fluid pressure operated cylinder operatively associated with said transport wheel means and operative to move said wheel means between its said lowered and raised positions upon selective energizing of said cylinder, said cylinder being connected in a fluid pressure control circuit including a source of fluid pressure and operative to supply fluid pressure to said cylinder so as to selectively move said wheel means between its said lowered and raised positions; the combination therewith comprising, control valve means connected in said fluid pressure control circuit and having a valve actuator operative in a first position to condition said control valve means so as to prevent fluid pressure flow to said cylinder in a manner to move said wheel means from its said lowered transport position to its said raised position, said actuator being movable to a second position conditioning said control valve means to allow fluid pressure flow to said cylinder so as to selectively move said transport wheels between its said lowered and raised positions, actuator means supported by said frame for operative association with said valve actuator, said actuator means being movable between a locking condition placing said valve actuator in its said first position, and a non-locking condition placing said valve actuator in its said second position, said actuator means including control lever means supported by said frame and operable to bias said actuator means between its said locking and non-locking conditions, said actuator means further including locking pin means supported by said frame for operative association with said valve actuator, said locking pin being longitudinally movable between a locking position placing said valve actuator in its said first position, and a non-locking position placing said valve actuator in its said second position, transport lock means operatively associated with said wheel means and cooperative with said actuator means to prevent movement thereof from its said locking condition to its said non-locking condition when said wheel means is in its said lowered position, said transport lock means being operative to enable movement of said actuator means from its said locking condition to its said non-locking condition in response to movement of said wheel means to its said raised position, said control lever means including an operating handle mounted adjacent the forward end of said frame, and including resilient means interposed between said operating handle and said locking pin enabling said locking pin to be selectively biased between its said locking and non-locking positions.