Patent ID: 8596474
Filing Date: 2013-12-03
Classification: B66C

Abstract:
1. A crane comprising: a first crane arm; a second crane arm connected to said first crane arm by a joint; a first drive including a piston-cylinder unit for pivoting said first crane arm and said second crane arm relative to each other, said first crane arm, said second crane arm, and said first drive being configured to pivot said first crane arm and said second crane arm starting from either one of two opposite end positions whereat said first crane arm and said second crane arm are in a substantially parallel relationship, said first drive being configured to pivot said first crane arm and said second crane arm relative to each other until said piston-cylinder unit of said first drive reaches a dead point position, the dead point position being a position whereat a longitudinal axis of said piston-cylinder unit is substantially on a line with said joint; and a second drive for pivoting said first crane arm and said second crane arm relative to each other while said piston-cylinder unit of said first drive moves through the dead point position.