Patent ID: 8029346

Claim:
A combine ( 10 ) comprising: a support frame ( 12 ) that is movable across a field; and a grain tank ( 42 ) fastened to the support frame ( 12 ) that includes two side walls ( 58 ) that are movable with respect to the support frame between a first retracted position and a first extended position by means of an adjusting drive ( 68 ) and wherein the two sidewalls extend vertically in the first retracted position; and two covers ( 84 ) that adjoin an upper portion of the side walls ( 58 ) and are movable with respect to the two sidewalls between a second retracted potion and a second extended position, wherein the covers ( 84 ) are components of a ring-shaped grain tank extension that forms a standing ring in the second extended position, and further wherein the covers substantially completely cover the grain tank ( 42 ) when the covers are in the second retracted position.