Patent ID: 6953167

Claim:
An improved wood chipper knife holder system for a power driven rotor head having at least one opening in its wood confronting surface for accommodating the system, the system including: a mount block having a counter knife receiving surface; a counter knife received thereon; a reversible knife, with flat opposing surfaces extending from one end to the other end and with opposed front and rear end transverse cutting edges, received on the counter knife; and a removable clamp member releasably secured on the block to clamp the knife in a cutting position in which one of its cutting edges projects forwardly beyond the counter knife; the improvement wherein: (a) the counter knife is releasably mounted on the counter knife receiving surface; (b) the clamp member and knife have transversely spaced pins and transversely aligned pin openings which permit 180° repositioning of said knife; and (c) the clamp member has a transverse surface for receiving and back-bracing the rearward transverse cutting edge of the knife, and locating the knife in cutting position.