Sprocket-brake drum construction for chain saw

摘要

PCT No. PCT/US80/01011 Sec. 371 Date Oct. 30, 1980 Sec. 102(e) Date Oct. 30, 1980 PCT Filed Aug. 8, 1980 PCT Pub. No. WO82/00436 PCT Pub. Date Feb. 18, 1982.A drive assembly for a chain saw (10) having a brake (42) wherein lugs (102) formed integrally on the brake drum (78) are mechanically connected within opening (72) of adjacent pairs of teeth (70) on the sprocket (22) which drives the saw chain (18) so that upon application of the brake (42) the brake drum (78) and the sprocket (22) stop simultaneously. The drive assembly includes a clutch (94) and a fastener (26) threadedly received on the drive shaft (24) to complete the assembly.