Crane
AssigneeEPSILON Kran GmbH
InventorJohannes Steindl
Life of this patent
Estimating the term…
Abstract
A crane, in particular a vehicle crane, includes a first crane arm and at least one second crane arm which are connected together by a joint. The crane arms are pivotable relative to each other by a drive having a piston-cylinder unit, in each case starting from one of the two end positions in which the crane arms are in substantially mutually parallel relationship until reaching a dead point when the longitudinal axis of the piston-cylinder unit is substantially on a line with the joint. There is provided at least one second drive by which it is possible to go beyond the dead point position of the piston-cylinder unit relative to the joint.
Claims19
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.
Dependencies are inferred from the claim text.