Patent ID: 6128997
Filing Date: 2000-10-10
Classification: B27B,Y10T

Abstract:
A cutting assembly (16) for a motor chain saw, said cutting assembly (16) comprising:a guide bar (9) having a peripheral guide groove (11) and guide surfaces (17) adjacent to said guide groove (11);a saw chain (10) circulating in said guide groove (11) in a longitudinal direction of said guide bar (9);said saw chain (10) comprised of chain members (12, 13, 14), said chain members comprising centrally arranged drive members (13) and connectors (12, 14) laterally connecting said drive members (13); wherein some of sad connectors and/or some of said drive members (13) are embodied as cutters having cutting portions (12) arranged alternatingly on opposite sides of said saw chain (10) in a circulating direction (15) of said saw chain (10);rivets (21) connecting said chain members (12,13,14) pivotably to one another and extending in a direction transverse to said circulating direction (15);said drive members (13) engaging said guide groove (11);said connectors (12, 14) slidingly supported on said guide surfaces (17);each one of said cutters (12) comprised of a base (23), a support stay (24) connected to said base (23), and a cutting tooth (29, 30) connected to said support stay (24);wherein said cutting tooth has a laterally projecting roof portion (29), having a leading end in said circulating direction (15), and a roof cutting edge (30) positioned at said leading end, wherein said support stay (24) has a first portion (26) positioned in a central plane (27) defined by said drive members (13), and wherein said laterally projecting roof portion (29) projects in a direction of a cutting plane (34) of said saw chain (10) in which direction said base (23) faces;wherein said laterally projecting roof portion (29) has an outer angled edge (32) extending in said circulating direction (15) parallel to said base (23);wherein said outer angled edge (32) has a lateral cutting edge (33) positioned in front of said roof cutting edge (30) in said circulating direction (15).