Patent ID: 6112419
Filing Date: 2000-09-05
Classification: A01G,B27B,F02B

Abstract:
A cutter head for a motor chainsaw, said cutter head comprising:a cutter head housing (9);a drive shaft (37) mounted in and projecting from said cutter head housing (9);a drive pinion (25) mounted on a portion of said drive shaft (37) projecting from said cutter head housing (9);a guide bar (10) having a first deflecting end positioned adjacent to said drive pinion (25);a saw chain (11) driven by said drive pinion (25) and circulating in a circulating direction on said guide bar (10);said saw chain (11) being deflected by said first deflecting end;said cutter head housing (9) having an exterior housing wall (23);a cover (18) connected to said exterior housing wall (23) of said cutter head housing (9);said cover (18) and said housing wall (23) enclosing a cuttings chamber (3) open toward said guide bar (10);said drive pinion (25) positioned in said cuttings chamber (3);said first end of said guide bar (10) clamped between said housing wall (23) of said cutter head housing (9) and said cover (18);wherein said cover (18) has a cuttings ejection opening (40) opposite said housing wall (23) in the vicinity of said first end of said guide bar in an area where said saw chain is deflected in a direction of exiting said cuttings chamber (3) in said circulating direction;wherein said cuttings ejection opening (40) has a rim (33, 47) with a first rim portion (33), said first rim portion (33) having a curvature configured to match a curvature of said first deflecting end); andwherein said cuttings ejection opening (40) has a ramp (41) extending from said first rim portion (33) into said cuttings chamber (30).