Patent ID: 6418004
Filing Date: 2002-07-09
Classification: F16P

Abstract:
A wood chipping machine comprising a safety system, said wood chipping machine including:chipping blades that rotate to chip material delivered to the machine; a feed rollers that grip and feed the material to the chipping blades; a feed chute that guides material to the feed rollers, the feed chute having walls defining a passage, an open front end for receiving the material and an open rear end adjacent the feed rollers; and a motor that drives the feed rollers and the chipping blades; said safety system comprising:at least one passive sensor incorporated in a band worn by a user of the wood chipping machine; at least one sensing coil mounted on one of the walls of the chute, the sensing coil generating a signal when the passive sensor is in the passage; and means for stopping the chipping blades and/or the feed rollers in response to the signal.