Driver's seat mounting structure for a tractor

Claim 1

In a driver's seat mounting structure for a tractor having a body carrying a first work implement at the front part thereof, a further work implement at the rear part thereof, an operation unit disposed in front of the driver's seat and associated with said first work implement, and a further operation unit disposed behind the driver's seat and associated with said further work implement, said two operation units being positioned at different vertical levels, said driver's seat being turnable between a forward facing position and a rearward facing position, said driver's seat mounting structure comprising a mounting member carrying said driver's seat for rotation about a vertical axis, first locking means for locking said seat relative to said mounting member in forward facing position and rearward facing position, a parallelogram link mechanism connecting said mounting member to the tractor body, said parallelogram link mechanism being oscillatable and lockable on axes extending transversely of the tractor body, whereby said driver's seat is moved forward and rearward and up and down relative to the tractor body to provide easy access to each of said operation units, second locking means for locking said mounting member in an upper position and a lower position, and handle means operatively connected to said first and second locking means for causing said locking means to lock and unlock said mounting member, said handle means being movable in horizontal and vertical planes, the movement of said handle means in one plane being operative to lock and unlock the first locking means and in the other plane to lock and unlock the second locking means.