Tree shear head assembly

A tree shear head assembly comprising a shear structure, a connecting frame having a boom connecting section to connect to a boom of a motorized vehicle, said connecting frame further having one or more connecting sections for attachment of at least one of a clamping grapple and a tree trunk support fork secured to a support column, said shear structure having a stationary jaw member and an inwardly curved displaceable jaw member secured in a common plane with said stationary jaw member and defining a mouth opening there between for receiving a tree trunk there across, said stationary jaw member having an elongated channel formed between a pair of straight parallel spaced members, each said spaced members having a forward gripping edge adjacent an entrance end of said elongated channel, said curved displaceable jaw member having a pivot connection at a rear end of said mouth opening and a free forward end, a flat blade secured to said curved displaceable jaw member and defining a straight blade edge extending between said pivot rear end and said free forward end, a cylinder secured to said curved displaceable jaw member to progressively displace said straight blade edge of said blade towards and into said elongated channel from a rear to a front end of said channel to impart a slicing motion of said blade into a tree trunk extending across said mouth opening and gripped by said forward gripping edge on opposed sides of said elongated channel as said jaw member is progressively displaced to effect a clean cut across said tree trunk.