US Patent 7497017 Debris removal apparatus for a jigsaw

A jigsaw comprising a debris or dust collection system is described. A shroud is arranged to encapsulate a portion of a saw blade such that debris from the blade ejected during cutting of a work-piece is captured in the shroud and entrained in an airflow provided by a vacuum source. The airflow passes along a pipe section from the shroud to the vacuum source, where the debris can be collected. The shroud is generally U-shaped and symmetrical such that it extends around other jigsaw components, such as the orbital action bell crank. As a result, the pipe can be fitted on either side of the jigsaw's shoe or footplate and engage with the shroud. The airflow in the immediate area of the cutting blade is transverse to the cut direction, thereby removing debris from the line-of-sight of the operator. The shroud is arranged such that only a portion of the blade passes through a volume defined by the shroud, footplate and work-piece. Thus, debris does not become entrained in other working parts of the tool, such as the reciprocating shaft or blade clamp.