Patent ID: 6962222
Filing Date: 2005-11-08
Classification: B62D

Abstract:
1. A mobile agricultural machine, comprising: right and left track frames; right and left travel crawlers; drive sprockets, at a front of said machine for supporting said travel crawlers; tension rollers, at a rear of said machine, in said right and left track frames, for supporting said travel crawlers; track rollers, in said right and left track frames, for supporting said travel crawlers between said drive sprockets and said tension rollers; crawler elevation arms, for attaching said right and left track frames to said machine, in a manner wherein elevation of said right and left track frames relative to said machine is adjustable by said crawler elevation arms; idler frames, for supporting said tension rollers; tension frames, for movably supporting said idler frames in a back and forth manner; a link mechanism, having a front idler link and a rear idler link, for connecting front sides of said tension frames to said crawler elevation arms by way of said front idler link and connecting rear sides of said tension frames to said track frames by way of said rear idler link, such that: in a lowered position a platform of said machine is adjacent to said track frames and said tension frames assume a nearly horizontal position; and during ascension, said platform is elevated with respect to said track frames, the front side of said tension frames are raised, and said tension rollers move in a nearly vertical downward direction.