Abstract: A dust shroud is disclosed for a pipe-cutting portable circular saw. The shroud comprises upper and lower blade housings which are nested and guided so that the lower housing can be moved into and out of the upper housing. The lower periphery of the lower housing generally conforms to the shape of the pipe to be cut. A device which cooperates with the saw and which fits into the pipe to collect dust from within the pipe is also described.

Abstract: A dust shroud for a portable circular saw is described comprising an upper blade housing, a lower blade housing, an external connecting link connecting the two and aligned with the saw blade, and flexible sealing means attached to the upper part of the lower blade housing. The thickness of the connecting link is not greater than the thickness of the saw blade and since the link is aligned with the saw blade it follows the saw blade through the kerf created by the blade in the worksheet. The upper blade housing is attached directly to the saw's motor housing and moves therewith while the lower blade housing is attached to the upper blade housing through the connecting link and is thus kept aligned with the upper housing as the saw cuts through the workpiece. The flexible sealing means keeps dust from escaping from the lower blade housing since it continuously conforms to irregularities in the surface of the workpiece.