Foldable agricultural implement

Claim 1

An agricultural implement comprising, a tool bar having ground working tools operatively supported thereon, said tool bar comprising a main frame and at least one wing frame pivotally connected to one of the ends thereof, said wing frame having inner and outer ends, pivotal connection means interconnecting said main frame and said wing frame whereby said wing frame may be pivotally moved from a working position substantially 180 degrees to a transport position over a portion of said main frame, said pivotal connection means comprising a first support means secured to one end of said main frame and extending upwardly therefrom, said first support means having inner and outer end portions and an upper end portion; a second support means secured to the inner end of said wing frame and extending upwardly therefrom, said second support means having inner and outer end portions and an upper end portion, the upper end portions of said first and second support means being pivotally connected about a horizontal axis which is transversely disposed to the length of said tool bar; a first linkage means pivotally connected at one end to said first support means inwardly of and below said upper end portion of said first support means; a second linkage means pivotally connected at one end to said second support means outwardly of and below said upper end portion of said second support means; a third linkage means pivotally connected to and extending between the other ends of said first and second linkage means; a power cylinder positioned above said tool bar, said power cylinder including a cylinder body mounted on said third linkage means, said power cylinder having a cylinder rod movably extending therefrom which is pivotally connected to the pivotal connection between the said upper end portions of said first and second support means whereby extension of said cylinder rod from said cylinder body will pivotally move said wing frame from its said working position to its said transport position and whereby retraction of said cylinder rod into said cylinder body will pivotally move said wing frame from its transport position to its working position.