Guide roll assembly for telescopic boom

Claim 1

A TELESCOPIC BOOM ASSEMBLY COMPRISING: (A) AN OUTER BOOM MEMBER; (B) AN INNER BOOM MEMBER TELESCOPICALLY POSITIONED WITHIN SAID OUTER MEMBER; AND (C) GUIDE MEANS FIXED TO SAID OUTER BOOM MEMBER AT SPACED POINTS ABOUT ITS PERIPHERY AND ALONG ITS LENGTH FOR SLIDABLY ENGAGING SAID INNER BOOM MEMBER AS THE LATTER IS MOVED LONGITUDINALLY OF SAID OUTER BOOM MEMBER, AT LEAST ONE OF SAID GUIDE MEANS COMPRISING: (1) A PAIR OF SPACED SUPPORT MEMBERS FIXED TO SAID OUTER BOOM MEMBER AND EXTENDING OUTWARDLY THEREFROM AND HAVING ALIGNED JOURNAL OPENINGS THERETHROUGH, (2) A CRANK PIN ROTATABLY POSITIONED IN SAID JOURNAL OPENINGS FOR ROTATION ABOUT A PREDETERMINED AXIS AND HAVING A CYLINDRICAL BEARING SUPPORT SURFACE DISPOSED BETWEEN SAID SPACED SUPPORT MEMBERS ON AN AXIS PARALLEL TO AND OFFSET FROM SAID PREDETERMINED AXIS, (3) A ROLLER BEARING ROTATABLY POSITIONED ON SAID BEARING SUPPORT SURFACE AND EXTENDING INWARDLY OF SAID OUTER BOOM MEMBER IN A DIRECTION TRANSVERSE TO A PLANE PASSING THROUGH THE LONGITUDINAL AXIS OF SAID OUTER BOOM MEMBER FOR BEARING ENGAGEMENT WITH SAID INNER BOOM MEMBER,