Sperry Corporation

Sperry Rand Corporation

J Dwayne Wells

L Dennis Butler

A control linkage for a round bale wagon is disclosed wherein both the operation of the bale pickup mechanism to squeeze a bale of crop material for firm engagement between a pair of projecting arms and the operation to lift a bale so engaged onto the load bed can be controlled by a single control lever. The squeeze and lift operations are powered by separate hydraulic cylinders operatively controlled by respective control valves having three position spools, spring loaded to the central, neutral position. The control linkage includes a cross link interconnecting the two respective control valves and a connecting link extending from a point on the cross link, closer to the squeeze valve than to the lift valve, for connection to the control lever. Movement of the control lever effects a movement of the squeeze valve spool to manipulate the squeeze function of the bale pickup mechanism before effecting a movement of the lift valve spool, which manipulates the lift function of the bale pickup; however, due to the spring loaded spools, the lift valve spool will return to the central, neutral position before the squeeze valve spool. A hydraulic system is also provided so that the squeeze function of the bale pickup mechanism can only be manipulated whenever the lift valve spool is in the neutral position.

Control linkage for two function bale pickup

A bale wagon having a bale-receiving area, a bale-accumulating area, means for transferring bales from the bale-receiving area to the bale-accumulating area, and an improved means for sensing the location of bales on the bale-receiving area and activating the means for transferring is disclosed. The improved sensing and activating means includes a cantilevered arm pivotable about a vertical axis between first and second predetermined sensing locations. A follower fixed to the arm and movable therewith either activates a sensor after a predetermined amount of radial movement corresponding to the second sensing location, or engages a spacer which is caused to activate the sensor after another smaller amount of radial movement corresponding to the first sensing location.

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Selma, CA, United States of America

J Dwayne Wells