Abstract: A seal for a butterfly valve includes an end cap with an outer tubular side wall surrounding an inner tubular side wall, both extending in the same direction providing a gap therebetween. At least the inner side wall is made from a resiliently deformable material. The end cap abuts a conduit entrance, and the inner and outer side walls extend therein, the outer side wall abutting an inner surface of the entrance of the conduit. A rotatable pivotal disk mounted inside the inner side wall within the entrance is rotatable between a position where the periphery of the disk engages the inner side wall to seal the entrance and a position where the disk is angled relative to the entrance, opening the entrance so a fluid may pass through the conduit. A butterfly valve assembly and a vacuum cleaner including the seal or the assembly are also disclosed.

Abstract: A collar system for a dust extractor is provided including: a collar including a drill passage extending through the collar and an extension forming an internal passage that connects at one end with the drill passage, the extension being attachable to a housing of the dust extractor to enable the internal passage to connect to a suction passage of the dust extractor; and a cover mounted adjacent an entrance of the drill passage, the cover being moveable between a first position where it covers the entrance and a second position where is remote from the entrance, wherein the cover comprises at least hole that passes through the cover.

Abstract: A seal for a butterfly valve includes an end cap with an outer tubular side wall surrounding an inner tubular side wall, both extending in the same direction providing a gap therebetween. At least the inner side wall is made from a resiliently deformable material. The end cap abuts a conduit entrance, and the inner and outer side walls extend therein, the outer side wall abutting an inner surface of the entrance of the conduit. A rotatable pivotal disk mounted inside the inner side wall within the entrance is rotatable between a position where the periphery of the disk engages the inner side wall to seal the entrance and a position where the disk is angled relative to the entrance, opening the entrance so a fluid may pass through the conduit. A butterfly valve assembly and a vacuum cleaner including the seal or the assembly are also disclosed.

Abstract: A collar system for a dust extractor is provided including: a collar including a drill passage extending through the collar and an extension forming an internal passage that connects at one end with the drill passage, the extension being attachable to a housing of the dust extractor to enable the internal passage to connect to a suction passage of the dust extractor; and a cover mounted adjacent an entrance of the drill passage, the cover being moveable between a first position where it covers the entrance and a second position where is remote from the entrance, wherein the cover comprises at least hole that passes through the cover.

Abstract: A collar system for a dust extractor is provided including: a collar including a drill passage extending through the collar and an extension forming an internal passage that connects at one end with the drill passage, the extension being attachable to a housing of the dust extractor to enable the internal passage to connect to a suction passage of the dust extractor; and a cover mounted adjacent an entrance of the drill passage, the cover being moveable between a first position where it covers the entrance and a second position where is remote from the entrance, wherein the cover comprises at least hole that passes through the cover.

Abstract: A suction cup dust extractor for a power tool is provided. The dust extractor includes a housing; a drill collar attached to the housing and having a drill passage formed through it; a suction chamber formed by the walls of the housing having an opening and which, in use, locates against a work piece to create a chamber; a single aperture located on the housing through which air can pass; at least one first air passage formed by the walls of the housing that connects between the drill passage and the aperture to enable air to pass from the drill passage to the aperture; and at least one second air passage formed within the housing that connects between the suction chamber and the single aperture and enables air to pass from the suction chamber to the aperture. A part of the first air passage is formed by a tube.