Patent ID: 6193087
Filing Date: 2001-02-27
Classification: B66C

Abstract:
A two armed system for use in a unit crane comprising:a base;a first arm; and,a second arm connected to said first arm and said base,wherein said first arm and said second arm are shiftable between a first position where said first arm is positioned above said second arm and a second position where said first arm extends away from said second arm, said first arm being rigid and said second arm comprising a plurality of units jointedly connected to form a polygon,first point (28) on a first one (19a) of said units and a second point (30) on a second one (20a, 20b) of said units being movable relative to each other,said first unit (19a) having a first end and a second end and an arm (19c) extending outwardly from a location between said first and second ends, said first point being located on said first unit arm (19c), andsaid first unit (19a) being connected to said second unit (20a, 20b) at a point between a first end and a second end of said second unit, said second point being located at the second end of said second unit.