An envelope (10) for use with a vacuum cleaner, the envelope (10) comprising flexible material arranged to provide a fluid path there-through, and further comprising a coupling arranged to couple the envelope (10) to a structural member for in use maintaining the fluid path open by supporting the envelope (10) against external pressure, wherein the envelope (10) is arranged in use to isolate, from the fluid path, the structural member that supports the envelope (10).

A vacuum tool that is removably couplable to a hose or wand of a vacuum.

A vacuum tool configured to be removably coupled to hose or wand of a vacuum includes a body including a first end, a second end, and a first longitudinal axis extending between the first end and the second end. The vacuum tool also includes a head coupled to the first end of the body, a connection portion coupled to the second end of the body and configured to couple the body to a hose or wand of a vacuum cleaner, and a brush coupled to the head. The brush includes an elongate support defining a second axis perpendicular to the longitudinal axis of the body and configured to couple the brush to the head, and a plurality of bristles positioned on the elongate support.

A vacuum tool configured to be removably coupled to hose or wand of a vacuum includes a body including a first end, a second end, and a first longitudinal axis extending between the first end and the second end. The vacuum tool also includes a head coupled to the first end of the body, a connection portion coupled to the second end of the body and configured to couple the body to a hose or wand of a vacuum cleaner, and a brush coupled to the head. The brush includes an elongate support defining a second axis perpendicular to the longitudinal axis of the body and configured to couple the brush to the head, and a plurality of bristles positioned on the elongate support.

A vacuum cleaner (100) is provided. The vacuum cleaner (100) includes a hand-held device (400), and the hand-held device includes: a housing (401); a dust cup (402) disposed in the housing (401) and having a dust outlet in a bottom thereof; and an ash pouring plate (405) disposed at a bottom of the housing (401. The ash pouring plate (405) is configured to be movable between an open position for opening the dust outlet and a closed position for closing the dust outlet.

A vacuum truck for dispensing water into a sewer or similar location and receiving recovered water from the sewer that includes debris to be removed therefrom. The vacuum truck includes a debris tank that receives the recovered water and retains debris removed from the recovered water. A primary and a secondary filter are positioned in the debris tank for separating debris from the recovered water. A water pump draws the recovered water through the secondary filter and provides the water to a tertiary filter that removes smaller debris from the recovered water. The recovered water from the tertiary filter is provided directly to a jetting water pump without being accumulated in a water holding tank. The vacuum truck includes a water storage tank that includes potable water for cleaning the truck or when recovered water is not available from the debris tank.

A hand-held vacuum cleaner (100) is provides, including a housing (1) and a floor brush (200), the housing (1) is provided with an air inlet (111) and an air blowing vent (121), the air blowing vent (121) is disposed adjacent to the air inlet (111); the floor brush (200) is provided with a floor brush inlet (201), a floor brush outlet (203) and a floor brush opening (202), the floor brush inlet (201) is in communication with the air blowing vent (121), the floor brush outlet (203) is in communication with the air inlet (111), the floor brush opening (202) is located at a side of the floor brush (200) away from the housing (1), and an airflow blowing from the air blowing vent (121) first flows to the floor brush opening (202) through the floor brush inlet (201), and then flows to the air inlet (111) through the floor brush outlet (203).

Provided is a dust limiting collection bag for collecting used insulation and method of making the bag. The bag is formed from a non-porous, heat-sealable plastic and includes a filter.

A vacuuming device for neutralizing flammable powders. The device includes a container having an upper chamber and a lower chamber separated by a baffle, with the upper chamber being in fluid communication with the lower chamber proximate an outer annular region of baffle. A liquid such as water is disposed in the lower chamber, and an air jet drawn into the lower chamber via a vacuum inlet line. In one embodiment, the air jet passes through the liquid for generation of a tangential flow that causes the body of liquid to rotate within the lower chamber. The rotation in the lower chamber can also cause the air in the upper chamber to rotate, so that liquid droplets entrained therein migrate to the outer wall centrifugally. Flammable particles entrained in the air jet are wetted and neutralized.

A vacuum truck for dispensing water into a sewer or similar location and receiving recovered water from the sewer that includes debris to be removed therefrom. The vacuum truck includes a debris tank that receives the recovered water and retains debris removed from the recovered water. A primary and a secondary filter are positioned in the debris tank for separating debris from the recovered water. A water pump draws the recovered water through the secondary filter and provides the water to a tertiary filter that removes smaller debris from the recovered water. The recovered water from the tertiary filter is provided directly to a jetting water pump without being accumulated in a water holding tank. The vacuum truck includes a water storage tank that includes potable water for cleaning the truck or when recovered water is not available from the debris tank.