# US 2017/0281998 A1 · Automatic nozzle for firefighting systems

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2017/0281998 A1
- Document ID: US20170281998A1
- Status: Published application
- Kind: A1
- Application number: 15/513,960
- Filed: 2015-10-14
- Published: 2017-10-05
- Earliest claimed: 2014-10-15
- Assignees: Etea Sicurezza Group Ltd
- Applicants: Etea Sicurezza Group Ltd
- Inventors: Ferruccio Cerruti
- Web page: https://patentgrep.com/patent/US20170281998A1

## CPC

- A62C 37/14: with frangible vessels
- A62C 31/05: with two or more outlets
- A62C 37/11: heat-sensitive
- A62C 99/0072: {using sprayed or atomised water}
- B05B 1/14: with multiple outlet openings (B05B1/02, B05B1/26 take precedence); with strainers in or outside the outlet opening
- B05B 1/1421: {the multiple outlet openings arranged in plural groups or rows (for roses or shower heads B05B1/1821)}
- B05B 1/265: {the liquid or other fluent material being symmetrically deflected about the axis of the nozzle}
- B05B 1/3006: {the controlling element being actuated by the pressure of the fluid to be sprayed (B05B1/323 takes precedence; single-unit outlet valves actuated by the pressure of the fluid to be sprayed B05B11/0062)}
- A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10)
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)

## Abstract

An automatic nozzle for firefighting low-pressure water mist systems comprising a nozzle body and shutter means, said nozzle body comprising a plurality of axial-symmetric components defining an inlet opening and a plurality of inner cavities, which are fluid-dynamic connected each other by means of one or more openings, being said components configured to generate a radial spray through a circumferential opening, which extends all over the circumference of a second component, said circumferential opening being formed between a base of an annular board of the second component and an upper surface of a hollow body of a third component, and two or more full cone sprays by means of the fluid passage through cylindrical openings on a circular and axial-symmetric body of a fifth component, configured to define a turbulent motion of the fluid in at least two correspondent cylindrical cavities of a fourth component.

## Claims

### Claim 1

An automatic nozzle (10) for firefighting low-pressure water mist systems comprising a nozzle body (200) and shutter means (107), said nozzle body (200) comprising a plurality of axial-symmetric components (101-106) defining an inlet opening and a plurality of inner cavities, which are fluid-dynamic connected each other by means of one or more openings, being said components (101-106) located in a way to share the same symmetry axis and configured to generate:
a radial spray (10′) through a circumferential opening (15), which extends all over the circumference of a second component (102), said circumferential opening (15) being formed between a base (14) of a cylindrical wall of the second component (102) and an upper surface (16) of a hollow body (13) of a third component (103), and
two or more full cone sprays (10″) by means of the fluid passage through cylindrical openings (26) on a circular and axial-symmetric body (24) of a fifth component (105), configured to define a turbulent motion of the fluid in at least two correspondent cylindrical cavities (23) of a fourth component (104), said two or more full cone sprays (10″) out coming through at least two orifices (22) fed by the at least two correspondent cylindrical cavities (23),
wherein said
axis of each of said cylindrical openings (26) of the fifth component (105) is inclined of a first angle (β) ranging between 10° and 80° with respect to an upper surface (S) of the circular and axial- symmetric body (24), the axis of each of said cylindrical openings (26) has a second inclination of a second angle (y) ranging between 30° and 90° and laying on a plane (FF), which is tangent to the upper surface (S) of the circular and axial-symmetric body (24) and contains the intersection points (R′, R) between the upper surface (S) and the axis of said cylindrical openings (26) converging towards a same orifice of the two or more orifices (22), said second angle (γ) being comprised between the projection of the axis of said cylindrical openings (26) on the plane (FF) and a straight line (r), passing through the intersection points (R′, R″).

### Claim 2 (depends on 1)

The automatic nozzle (10) according to claim 1, wherein said upper surface (16) of the hollow body (13) of the third component (103) and said base (14) of an annular edge (6) of the second component (102) have correspondent external radius which differ of a length (ΔL) greater or equal to 1 mm.

### Claim 3 (depends on 1)

The automatic nozzle (10) according to claim 1 the wherein said upper surface (16) of the hollow body (13) of the third component (103), creating the circumferential opening (15) of the radial spray (10′), in its radially inner portion is shaped to form a recess (31) with the annular edge (6) of a cylindrical central body (3) of the second component (102), to create in an annular cavity (7) fluid vortexes, which improve water nebulization at the exit of the circumferential opening (15).

### Claim 4 (depends on 1)

The automatic nozzle (10) according to claim 1, wherein said upper surface (16) of the hollow body (13) of the third component (103) comprises a radially outer surface (16″), forming a gap (32), whose width gradually increases toward the water exit, to break the water layer in small droplets.

### Claim 5 (depends on 1)

The automatic nozzle (10) according to claim 1, wherein said at least two or more orifices (22) are inclined of an angle (a) ranging between 10° and 80° with respect to the symmetry axis of the fourth component (104).

### Claim 6 (depends on 1)

The automatic nozzle (10) according to claim 1, wherein said second component (102) comprises the cylindrical central body (3) having an opening (4), which is co-axial to the cylindrical central body (3) and crosses the cylindrical central body (3) all over its length, and the annular edge (6), co-axial to the cylindrical central body (3) and having a smaller height than the cylindrical central body (3).

### Claim 7 (depends on 6)

The automatic nozzle (10) according to claim 6, wherein said cylindrical central body (3) of the second component (102) comprises one or more not co-axial openings (5), which cross the cylindrical central body all over its length.

### Claim 8 (depends on 6)

The automatic nozzle (10) according to claim 6 wherein said cylindrical central body (3) and the annular edge (6) create an annular cavity (7), which is closed on one side by a wall (8) and open on the opposite side, where the third component (103) is steadily connected.

### Claim 9 (depends on 1)

The automatic nozzle (10) according to claim 1, wherein said fifth component (105) comprises the circular and axial-symmetric body (24), having a thickness smaller than the maximum diameter of said circular and axial-symmetric body (24) and a central passing-through opening (25), which completely crosses the circular and axial-symmetric body (24).

### Claim 10 (depends on 1)

The automatic nozzle (10) according to claim 1, wherein said cylindrical openings (26) fluid-dynamically connect an internal cavity (19) of the fourth component (104) with cylindrical cavities (23) of the same fourth component (104), localized upstream of the at least two orifices (22).

### Claim 11 (depends on 1)

The automatic nozzle (10) according to claim 1, wherein said shutter means (107) comprise a cylindrical body (28), crossing all components (101-106) of the nozzle body (200) and is co-axial to said further components.

### Claim 12 (depends on 11)

The automatic nozzle (10) according to claim 11, wherein said shutter means (107) comprise at the lower end a cavity (29), which is suitable to accommodate an end of a thermal bulb (27) and at the upper end a seat (30), which is suitable to accommodate sealing means (33), which, adhering at the inner walls of a second opening (1′) of a first component (101), prevent water passages, when the thermal bulb (27) is not broken.