Patent ID: 7044315

Claim:
Telescopic boom of a crane, comprising a pivotally-mounted section ( 2 ), telescopic sections ( 3 , 4 ) arranged to telescope out of the pivotally-mounted section ( 2 ), and a guy system ( 5 ) comprising at least one guy support ( 6 ) pivotally housed on one of the sections ( 2 , 3 , 4 ), and a guy cable ( 7 ) adjustably-supported on this guy support ( 6 ) for winding or unwinding with respect thereto, wherein said guy cable ( 7 ) running from the guy support ( 6 ) has radially-thickened areas ( 25 ) positioned at discrete intervals along said cable ( 7 ), and the guy support ( 6 ) comprises a cable lock ( 22 ) positioned to engage the thickened areas ( 25 ) and lock the cable ( 7 ) in place or move away from the cable ( 7 ) to allow the cable ( 7 ) to wind or unwind.