Saw bars for portable power driven chain saws

Claim 1

A SAW BAR FOR PORTABLE POWER DRIVEN CHAIN SAWS AND OF THE KIND HAVING A SPROCKET WHEEL AT ITS FREE END AROUND WHICH A SAW CHAIN EXTENDS, A GUIDE GROOVE FOR THE SAW CHAIN EXTENDING ALONG THE EDGE OF THE SAW BAR AND SAID SPROCKET WHEEL HAVING A THICKNESS SUBSTANTIALLY CORRESPONDING TO THE WIDTH OF THE GUIDE GROOVE, SAID SAW HAVING SPACED APART SIDE PLATES AT ITS FREE END PROVIDED WITH OPENINGS OPPOSITE ONE ANOTHER, SIDE MEMBERS EACH BEING SET IN ONE OF SAID PLATE OPENINGS, SAID SIDE MEMBERS EACH HAVING BEVELLED CIRCUMFERENTIAL EDGES, SAID SIDE PLATE OPENINGS EACH HAVING EDGES DEFINING SAID OPENINGS BEING BEVELLED IN A MANNER CORRESPONDING TO SAID SIDE MEMBER BEVELLED CIRCUMFERENTIAL EDGES WHICH ENGAGE THEREWITH, A MEMBER SECURED BETWEEN SAID SIDE MEMBERS AND PROVIDING AN INNER RACE, ROLLER ELEMENTS POSITIONED ON SAID INNER RACE ROTATABLY SUPPORTING THE SPROCKET WHEEL, AND SAID SIDE MEMBERS, THE OUTER SURFACES OF WHICH ARE IN SUBSTANTIALLY THE SAME PLANE AS THE OUTER SURFACES OF SAID SIDE PLATES, SURROUND AN ANNULAR SPACE WHICH ENCLOSES SAID ROLLER ELEMENTS AND THE EXTENSION OF WHICH AXIALLY OF THE SPROCKET WHEEL, IS LARGER THAN THE WIDTH OF THE SAW BAR GUIDE GROOVE.