Patent ID: 6213318
Filing Date: 2001-04-10
Classification: B66C,Y10T

Abstract:
A crane having a boom with a rotatable boom section connection system, the crane having an upper works rotatably mounted on a lower works, the upper works including a load hoist winch, the boom comprising:a) at least a first and second boom section each with a longitudinal axis and a first and second end, the second end of the first section being coupled to the first end of the second section;b) at least one male connector on the second end of the first section coupled to a female connector on the first end of the second section;c) the male connector comprising a base and a protrusion, the base and protrusion each having an extension in a direction generally perpendicular to the longitudinal axis of said first boom section, the extensions and protrusion defining a socket;d) the female connector comprising two protrusions spaced apart at a distance such that the protrusion of the male connector fits between the two protrusions, the female connector further comprising a coupler connected to at least one of the protrusions and extending toward the other protrusion and fitting within the socket of the male connector; ande) a retainer extending between and secured to the extensions of the male connector enclosing the coupler within the socket and preventing the male and female connectors from uncoupling.