Patent ID: 6186346
Filing Date: 2001-02-13
Classification: B66C,B66D

Abstract:
A combination comprising:a boom having a distal end;a support structure connected adjacent said distal end of said boom;a first sheave set supported by said support structure, said first sheave set including at least one sheave;a pivot arm having a first end and a second end, a portion of said pivot arm, adjacent said first end of said pivot arm, being pivotally attached to said support structure about a pivot axis, wherein said pivot arm is rotated about said pivot axis a first degree of rotation to a first working position and rotated about said pivot axis a second degree of rotation to a stowed position; anda second sheave set supported adjacent said second end of said pivot arm, said second sheave set including at least one sheave, wherein said second sheave set is contained within said boom when said pivot arm is in said stowed position.