#$%^&*AU2013203355B220160121.pdf#####Abstract A timber-working head (10) having a fore-aft dimension (22) and a lateral dimension (24) perpendicular to the fore-aft dimension, the timber-working head comprising: a frame (28)； a grapple-and-feed system (30) mounted to the frame, the grapple-and-feed system comprising a first drive arm (34), a second drive arm (36), a first delimb arm (44), and a second delimb arm (46)； the first and second drive arms (34, 36) attached pivotally to the frame (28) on laterally opposite sides of a median plane (20) of the timber- working head (10), and the first and second delimb arms (44, 46) attached pivotally to the frame on laterally opposite sides of the median plane (20), each delimb arm comprising a blade； and a delimb knife module (32) comprising a platform (52) detachably mounted to the frame, a central blade (54), a first side blade (56), and a second side blade (58), the central blade mounted to the platform (52) in fixed relation thereto, the first and second side blades mounted pivotally to the platform such that the first and second side blades are positioned on laterally opposite sides of the central blade relative to the lateral dimension (24), and the central blade (54) and the first and second side blades (56, 58) cooperating to provide the delimb knife module (32) with a cutting edge that is variable in profile in response to pivotal movement of the first and second side blades relative to the platform, each of the first and second side blades being biased relative to the platform (52) in a timber feed path-narrowing direction.1/12 32 22 FIG. 1 24 35 28 46 44 38 4840 C r 42 36 34 304/12 CN --t cn ICI,- I,co co CN C', MCT) C14 LO CN C.0 co m co LO C.0 C%4 CN co I,C%4 C=) co C4 cn cr) CN C%4 C.D 14, C4 V- LO - - - - - - - - - - - - - - - - - - - -04 LO 04 co co CN 00 C%4 CN co c=1 CiD co LO U
