Patent ID: 9085444
Filing Date: 2015-07-21
Classification: B66C,E05D,F03D,F05B,F16M,Y02E,Y02P

Abstract:
1. Crane arm ( 1 ), comprising a first crane end portion ( 3 ) configured to be connected to pillars ( 20 ) while the opposite end portion is a free second crane end portion ( 4 ), where the crane arm ( 1 ) is comprised of a plural of connecting links ( 2 ), each connecting link ( 2 ) exhibiting a predetermined height ( 5 ), and being oriented in the direction ( 6 ) of the force of gravity, whereby each connecting link ( 2 ) in a longitudinal direction, perpendicular to the direction ( 6 ) of the force of gravity, has a first end portion ( 9 ) and a second end portion ( 11 ) and at the first end portion ( 9 ) is provided with at least one first means ( 8 ) for providing a rotary connection ( 17 ) with a successive connecting link ( 2 ) and at the second end portion ( 11 ) is provided with at least one second means ( 10 ) for the receiving of a preceding first means ( 8 ) for providing a preceding rotary connection ( 17 ) with a preceding connecting link ( 2 ) enabling rotation in a direction around the pillar ( 20 ) being oriented perpendicular to the direction ( 6 ) of the force of gravity wherein each connecting link ( 2 ) has a first means ( 8 ) and a second means ( 10 ) placed in an upper holding means ( 13 ) being mounted at the upper end of a centre element ( 12 ) and a lower first means ( 8 ′) in a lower first holding means ( 14 ) placed at the lower end of the centre element ( 12 ) and a lower second means ( 10 ′) in a lower second holding means ( 15 ) placed outermost at the lower end of the centre element ( 12 ), and in that the upper first and second means ( 8 , 10 ) in relation to the lower first and second means ( 8 ′, 10 ′) are placed in relation to each other to form a first rotary axis ( 16 ) and a second rotary axis ( 18 ), and whereby the rotary axes ( 16 , 18 ) are arranged in parallel, which upper first and second means ( 8 , 10 ) and lower first and second means ( 8 ′, 10 ′) are cooperatively configured so that each of the consecutive connecting links 2 , 2 ″ may freely be mounted or respectively disassembled from the preceding connecting link 2 ′, 2 , wherein each first means ( 8 ) further comprises a protrusion which exhibits a circular cross section and is oriented ( 6 ) opposite the force of gravity and cooperates with a corresponding one of the second means ( 10 ) for receiving the first means ( 8 ), and wherein each second means has a complementary perforation for receiving a first means protrusion and providing of a rotary connection ( 17 ).