A filter that includes: a filter base portion having a first main surface and a second main surface, the filter base portion defining a plurality of through-holes connecting the first main surface and the second main surface via an inner wall extending from the second main surface toward the first main surface; and a support portion that has a plurality of protruding portions located in respective through-holes of the plurality of through-holes and disposed on the second main surface of the filter base portion, the plurality of protruding portions having an outer wall in contact with the inner wall of the filter base portion, wherein a first opening on the first main surface side of the filter base portion is larger than a second opening on the second main surface side of the filter base portion, and there is a clearance between the filter base portion and the support portion.

A filter that includes: a filter base portion having a first main surface and a second main surface, the filter base portion defining a plurality of through-holes connecting the first main surface and the second main surface via an inner wall extending from the second main surface toward the first main surface; and a support portion that has a plurality of protruding portions located in respective through-holes of the plurality of through-holes and disposed on the second main surface of the filter base portion, the plurality of protruding portions having an outer wall in contact with the inner wall of the filter base portion, wherein a first opening on the first main surface side of the filter base portion is larger than a second opening on the second main surface side of the filter base portion, and there is a clearance between the filter base portion and the support portion.

A dust mitigation system for a mobile sweeper, the dust mitigation system including a cover to at least partially cover one or more brushes of the mobile sweeper, a dust collector including at least one fan and one or more filters, and at least one duct fluidly connecting the cover with the dust collector.

A dust mitigation system for a mobile sweeper, the dust mitigation system including a cover to at least partially cover one or more brushes of the mobile sweeper, a dust collector including at least one fan and one or more filters, and at least one duct fluidly connecting the cover with the dust collector.

A cyclone assembly for a surface cleaning apparatus has a first cyclonic cleaning stage having a first end moveable between a closed position in which a first stage cyclone chamber and a first stage dirt collection chamber are closed and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are open, and a second cyclonic cleaning stage having a second end moveable between a closed position in which a plurality of second stage cyclone chambers and at least one second stage dirt collection chamber are closed and an open position in which the second stage cyclone chambers and the second stage dirt collection chamber are open.

An air cleaner is provided that includes a first air cleaning module including a first fan that generates an air flow toward a first discharge outlet from a first suction inlet; a second air cleaning module including a second fan that generates an air flow toward a second discharge outlet from a second suction inlet; a divider provided between the first air cleaning module and the second air cleaning module, the divider including a dividing plate space; and a printed circuit board (PCB) device provided in the dividing plate space.

Degassing device for systems for treatment of food products such as leaf vegetables, tuberous, fruit of meet, cheeses or sausages, and like, characterized in that it includes—a degassing conduct for a food product treatment fluid, the degassing conduct having, in sequence along its development trajectory, an inclined inlet tract, within which the flow fluid rises, a degassing tract, and an outlet tract, within which the flow is directed downward; and—a degassing chamber, in correspondence of the degassing tract; the degassing tract having, at least on its upper wall, a plurality of holes suitable to communicate said degassing tract with the degassing tract to permit exit of air bubbles trapped within the flow from said degassing chamber, preventing exit of food products.

Degassing device for systems for treatment of food products such as leaf vegetables, tuberous, fruit of meet, cheeses or sausages, and like, characterized in that it includes—a degassing conduct for a food product treatment fluid, the degassing conduct having, in sequence along its development trajectory, an inclined inlet tract, within which the flow fluid rises, a degassing tract, and an outlet tract, within which the flow is directed downward; and—a degassing chamber, in correspondence of the degassing tract; the degassing tract having, at least on its upper wall, a plurality of holes suitable to communicate said degassing tract with the degassing tract to permit exit of air bubbles trapped within the flow from said degassing chamber, preventing exit of food products.

A filtration filter comprises a porous film including a central film portion having a plurality of through holes and an outer edge portion adjacent to the central film portion. The porous film portion lies in a flat plane in the absence of a force being applied to the central portion of the central film portion. A frame holds the outer edge portion of the porous film in such a manner that when a force is applied to the central film portion in a first direction, the central film portion moves in the first direction relative to the flat plane and the outer edge portion moves in a second direction, opposite to the first direction, relative to the flat plane. In this way stresses applied to the porous film during a filtering operation are reduced.

A filtration filter comprises a porous film including a central film portion having a plurality of through holes and an outer edge portion adjacent to the central film portion. The porous film portion lies in a flat plane in the absence of a force being applied to the central portion of the central film portion. A frame holds the outer edge portion of the porous film in such a manner that when a force is applied to the central film portion in a first direction, the central film portion moves in the first direction relative to the flat plane and the outer edge portion moves in a second direction, opposite to the first direction, relative to the flat plane. In this way stresses applied to the porous film during a filtering operation are reduced.