Patent ID: 7377297

Claim:
A tree delimber, comprising: a) a base frame, said base frame including a horizontal roof plate; b) a cutter head assembly; c) a yoke assembly including a floor plate mounted on said horizontal roof plate for rotation about a vertical axis, said yoke assembly supporting said cutter assembly for pivotal movement about a horizontal axis; and d) a roller system disposed between said horizontal roof plate and said floor plate and supporting said yoke assembly; e) said roller system including a roller unit on said base frame; f) said roller unit including a support roller journalled in a roller housing on a horizontal axle shaft and extending upwardly from said horizontal roof plate; g) an adjustment member in said roller housing and engaging said axle shaft; h) said adjustment member being movable horizontally in said roller housing and, as it moves, being effective to raise and lower said lower vertically relative to said horizontal roof plate so as to properly engage said floor plate; i) said moveable adjustment member including a wedge shaped element having an inclined support surface; j) said wedge shaped element supporting said inclined surface on said axle shaft and being moveable horizontally in said roller housing to raise or lower said axle shaft; k) a horizontally oriented draw bolt in said roller housing and protruding outwardly from one side of said base frame; l) said draw bolt having a threaded section which is threadably connected to said wedge shaped element.