Patent ID: 6450524
Filing Date: 2002-09-17
Classification: A01B

Abstract:
An agricultural implement that is pulled comprising:a main frame having a front end and an opposing rear end; a hitch attached to said main frame adjacent said front end thereof for attachment of the implement to a towing vehicle; a pair of steerable wheels supporting said main frame and attached thereto toward said rear end thereof; and hydraulic circuitry for controlling functions of said implement, said circuitry including a feed line and a return line for connection to a hydraulic pump and an oil tank, respectively, said connection enabling operation of said functions of said implement, the improvement comprising: said steerable wheels are each mounted on individual hubs and interconnected such that they are generally parallel to each other at all times; a blocking mechanism connected to said circuitry and selectively engagable with at least one of said wheels, and when so engaged, said blocking mechanism pushes said wheels into a generally fixed fore-and-aft position; and said circuitry including an actuating mechanism for selectively engaging said blocking mechanism by providing hydraulic pressure from said pump to said return line.