Patent ID: 6148525
Filing Date: 2000-11-21
Classification: B27B

Abstract:
A chain saw, having a chain tension device for tensioning a cutting chain comprising:a guide bar having an outer periphery for guiding a cutting chain therearound;a sprocket for driving the cutting chain, and said sprocket being driven by a drive mechanism;the cutting chain wrapped around said sprocket and said outer periphery of said guide bar for rotation therearound;a chain saw body supporting said guide bar, said sprocket and said drive mechanism and including a leaf spring insertion hole formed in the chain saw body and situated between said guide bar and said sprocket; anda leaf spring interposed between an end of said guide bar adjacent said sprocket and said sprocket, said leaf spring, being captively supported and housed within the leaf spring insertion hole, resiliently and directly engaging said chain saw body and said guide bar end to bias said guide bar in a longitudinal direction of said guide bar, away from said sprocket, thereby applying a desired tension to said cutting chain.