Power saw blade

摘要

PCT No. PCT/DE84/00253 Sec. 371 Date Jul. 23, 1985 Sec. 102(e) Date Jul. 23, 1985 PCT Filed Nov. 23, 1984 PCT Pub. No. WO85/02363 PCT Pub. Date Jun. 6, 1985.An elongate chain support blade of a chain saw is shaped so as to provide clearance between respective runs of the chain and longitudinal edges of the blade, thereby reducing friction and reducing oil usage. Other aspects of the invention reside in a chain guide wheel on the blade providing the chain with a short inclined chain run at the forward end, and different forms of chain-tensioning devices.