# US 7,607,195 B2 · Cleaning unit of roads and the like > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,195 B2 - Document ID: US7607195B2 - Status: Granted - Kind: B2 - Application number: 11/543,350 - Filed: 2006-10-05 - Published: 2007-04-12 - Granted: 2009-10-27 - Earliest claimed: 2005-10-07 - Assignees: Dulevo International S. p. A. - Inventors: Fabrizio Tagliaferri - Web page: https://patentgrep.com/patent/US7607195B2 ## CPC - E01H 1/0863: {Apparatus loosening or removing the dirt by blowing and subsequently dislodging it at least partially by suction (liquids or semi-liquids E01H1/108); Combined suction and blowing nozzles} - E01H: STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING {OR PREVENTING} FOG IN GENERAL {CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS}(cleaning in general B08B) ## Abstract A cleaning unit is disclosed, comprising: a containment chamber (2) defining an accumulation base (10), a suction apparatus (3) including a suction inlet (6) positioned close to the ground, and a filtering apparatus (12), the suction apparatus (3) comprising primary suction means (4) and secondary suction means (5) positioned in parallel to one another above the accumulation base (10), the primary suction means (4) controlling said suction inlet (6) and the secondary suction means (5) being suitable to expel filtered air, and the containment chamber (2) including separating element (9) which separates the turbulent zone (5a), the air inside of which being highly turbulent, and a recirculation zone (4a), the air inside of which having a low turbulence, the recirculation zone (4a) being connected to the primary suction means (4) and the turbulent zone (5a) being connected to the secondary suction means (5). ## Claims ### Claim 1 Cleaning unit of roads and the like, comprising: a containment chamber (2) defined by an accumulation base (10), a suction apparatus (3) including a suction inlet (6) positioned close to the ground, and a filtration apparatus (12), said suction apparatus (3) being suitable to recycle the air, between said containment chamber (2) and said suction inlet (6), and including primary suction means (4) and secondary suction means (5) positioned in parallel to one another and above said accumulation base (10), said primary suction means (4) controlling said suction inlet (6) and said secondary suction means (5) being suitable to expel filtered air, and said containment chamber (2) including a separation element (9) that separates a turbulent zone (5a), in which exists air with a high level of turbulence and energy, and a recirculation zone (4a), in which exists air with a low level of turbulence and energy, said primary suction means (4) being placed in said recirculation zone (4a) and said secondary suction means (5) being placed in said turbulent zone (5a). ### Claim 2 (depends on 1) Unit according to claim 1, wherein said suction apparatus (3) includes a suction duct (7) and conveyance members (7c) suitable to channel said air, refuse and pollutants from said inlet (6) to said turbulent zone (5a), and a recirculation duct (8), suitable to channel said air from said recirculation zone (4a) to said inlet (6), in a manner to aid the suction of said pollutants. ### Claim 3 (depends on 2) Unit according to claim 2, wherein said conveyance members (7c) are defined by an extension of said suction duct (7), and wherein said conveyance members (7c) pass through said suction element (9). ### Claim 4 (depends on 1) Unit according to claim 1, wherein said suction apparatus (3) includes a suction duct (7) and a recirculation duct (8), and wherein said suction (7) and recirculation ducts (8) are outside said containment chamber (2). ### Claim 5 (depends on 1) Unit according to claim 1, wherein said separation element (9) is made up by a vertical wall section. ### Claim 6 (depends on 1) Unit according to claim 1, wherein said primary suction means (4) have a capacity between 60% and 70% of the total and said secondary suction means (5) have a capacity between 30% and 40% of the total. ### Claim 7 (depends on 1) Unit according to claim 1, having a filtration element (11) which extends in said containment chamber (2) in such a manner so as to filter refuse sucked by said primary suction means (4) as well as said secondary suction means (5), and in which said filtering apparatus (12) is suitable to filter said refuse and said pollutants sucked by said secondary suction means (5). ### Claim 8 (depends on 7) Unit according to claim 7, wherein said filtration element (11) is made up by a net having a mesh opening between 8 mm and 10 mm. ### Claim 9 (depends on 1) Unit according to claim 1, wherein said filtering apparatus (12) includes a filtering cloth filter (12a). ### Claim 10 (depends on 9) Unit according to claim 9, in which said filtering apparatus (12) includes an absolute filter (12b) placed in series to said filtering cloth filter (12a). ### Claim 11 (depends on 9) Unit according to claim 9, wherein said filtering apparatus (12) includes an electrostatic filter placed in series to said filtering cloth filter (12a). ### Claim 12 (depends on 1) Unit according to claim 1, comprising a second filtering device (11a) positioned between said filtering device (11) and said primary suction means (4).