Patent ID: 8256335

Claim:
A bi-directional chain for a chainsaw comprising: (a) a continuous chain having opposite sides having a plurality of alternating first and second link sections pivotally connected to one another; (b) said first link sections each having a first cutting link disposed on a first side of the chain with opposite first and second ends, said first cutting link pivotally connected at its first end to a first drive link, said drive link having a groove oriented to drive the chain in a first direction, said first cutting link having a cutting tooth on its first end projecting transversely across the chain and having a raker tooth spaced from said cutting tooth, said first cutting link pivotally connected to a second drive link at its second end, said second drive link defining a groove oriented to drive the chain in a second opposite direction; (c) said first link sections having a second cutting link disposed on the second side of the chain and having opposite first and second ends pivotally connected at a first end to a third drive link, said third drive link having a groove oriented to drive the chain in a first direction, said second cutting link having a cutting tooth on its first end projecting transversely across the chain and having a raker tooth spaced from said cutting tooth, said cutting link pivotally connected to a fourth drive link at its second end, said fourth drive link defining a groove oriented to drive the chain in a second direction; (d) said second link sections having a first cutting link disposed on the first side of the chain with opposite first and second ends, said cutting link pivotally connected at its first end to a fifth drive link, said fifth drive link having a groove oriented to drive the chain in a first direction, said cutting link having a cutting tooth at its second end projecting transversely across the chain and having a raker tooth spaced from said cutting tooth, said cutting link pivotally connected to a sixth drive link at its second end, said sixth drive link defining a groove to drive the chain in a second direction; and (e) said second link sections having a second cutting tooth disposed on the second side of the chain with opposite first and second ends, said cutting link pivotally connected at its first end to a seventh drive link, said seventh drive link having a groove oriented to drive the chain in a first direction, said cutting link having a cutting tooth at its second end projecting transversely across the chain and having a raker tooth spaced from said cutting tooth, said cutting link pivotally connected to an eighth drive link at its second end, said eighth drive link defining a groove to drive the chain in a second direction.