Dry sprinkler assemblies

Patent metadata

Field	Value
Publication number	US-2016339283-A1
Application number	US-201615230272-A
Country	US
Kind code	A1
Filing date	Aug 5, 2016
Priority date	Jun 28, 2011
Publication date	Nov 24, 2016
Grant date	—

Abstract

A dry sprinkler for a fire protection system having a configuration with one or more coupling arrangements for connection to a fluid supply piping of the system. The dry sprinkler structure further includes an inner surface and inner assembly to provide a preferred discharge performance. The dry sprinkler provides for a flow rate from the outlet of the sprinkler in accordance with the start pressure at the inlet of the sprinkler and the rated discharge coefficient, K factor, ranging between 16.8 GPM/PSI½ and 33.6 GPM/PSI½

First claim

1 - 17 . (canceled)

18 . A dry sprinkler comprising:
an outer structural assembly having a proximal inlet, a distal outlet, and an internal passageway extending between the inlet and the outlet defining a longitudinal axis of the sprinkler, the outer structural assembly including:
an outlet frame including an internal bore defining the outlet, the outlet frame including a deflector axially spaced at a fixed distance from the outlet;
an inlet fitting including a proximal head portion and a distal body portion, the head portion including an external thread for a threaded-type coupling connection to a fluid supply pipe, the inlet fitting having an inner surface defining a proximal portion of the internal passageway coaxially and symmetrically disposed about the longitudinal axis, the inlet fitting including a sealing surface of the dry sprinkler disposed axially along the inner surface such that the external thread extends proximally of the sealing surface; and
a casing tube disposed between the inlet fitting and an outlet frame;
a thermal trigger assembly for thermally triggering the sprinkler from an unactuated state to an actuated state, the thermal trigger assembly engaged with the outlet frame in an unactuated state of the sprinkler; and a seal assembly disposed along the passageway coaxially aligned along the longitudinal axis,
wherein in the unactuated state of the sprinkler, the seal assembly is supported by the thermal trigger assembly so as to be in contact with the sealing surface, and in an actuated state of the sprinkler the sealing assembly being spaced from the sealing surface, the proximal portion of the passageway being coaxially aligned and symmetrically disposed about the sealing assembly in each of the unactuated and actuated states.

19 .- 24 . (canceled)

25 . The dry sprinkler of claim 18 , wherein the inlet fitting defines an entrance surface proximal of the sealing surface, the entrance surface having a radiused profile.

26 . The dry sprinkler of claim 18 , wherein the inlet fitting defines an entrance surface proximal of the sealing surface, the entrance surface having a tapered profile.

27 . The dry sprinkler of claim 18 , wherein the nominal K-factor is nominally one of (i) 16.8 (16.0-17.6) GPM/(PSI) 1/2 ; (ii) 19.6 (18.6-20.6) GPM/(PSI) 1/2 ; (iii) 22.4 (21.3-23.5) GPM/(PSI) 1/2 ; (iv) 25.2 (23.9-26.5) GPM/(PSI) 1/2 ; (v) 28.0 (26.6-29.4) GPM/(PSI) 1/2 ; and 33.6 (31.9-35.3) GPM/(PSI) 1/2 .

28 . (canceled)

29 . The dry sprinkler of claim 18 , wherein external threads comprise American National Standard Taper Pipe Thread (NPT) defining a nominal 1.25 inch.

30 . The dry sprinkler of claim 18 , wherein the casing tube defines a nominal pipe diameter of 1½ inch and an axial length between about two to about fifty inches.

31 . The dry sprinkler of claim 18 , wherein the inner surface of the inlet fitting expands the passageway from the sealing surface and distally converges toward the casing tube.

32 . (canceled)

33 . The dry sprinkler of claim 18 , wherein the external pipe thread defines a 1¼ inch diameter and the sealing surface defines an internal opening with a diameter of about one inch (1 in.).

34 . (canceled)

35 . The system of claim 18 , wherein the dry sprinkler further comprises an internal assembly comprises a fluid tube, a guide tube and trigger seat supported by the thermal trigger in the unactuated state of the sprinkler, the fluid tube including a plurality of apertures and a plurality of projections.

36 . The dry sprinkler of claim 18 , wherein the outlet defines a diameter of about 0.95 inch with the sprinkler having the K-factor value to about 17 GPM/(PSI) 1/2 .

37 . The dry sprinkler of claim 18 , wherein the outlet is about 1.125 inches and wherein the seal assembly defines an axial displacement of about 0.75 inch with the sprinkler having the K-factor value to about 19.6 GPM/(PSI) 1/2 .

38 . The dry sprinkler of claim 18 , wherein the thermal trigger assembly element is one of a solder thermal trigger assembly and frangible bulb.

39 . The dry sprinkler of claim 18 , wherein the trigger element is thermally rated for any one of 135, 155, 165, 175, 200, 214 or 286 degrees Fahrenheit.

40 . The dry sprinkler of claim 18 , wherein the trigger element has an RTI of 50 (meters-seconds) 1/2 or less.

41 . The dry sprinkler of claim 18 , wherein the trigger element has an RTI of 80 (meters-seconds) 1/2 or more.

Assignees

• Tyco Fire Products Lp

Inventors

• Ringer Yoram
• Silva Jr Manuel R
• Coletta George B
• Leduc Roger H
• Weed Sean D

Classifications

• A62C37/12

  with fusible links · CPC title

• Y10T29/49826

  Assembling or joining · CPC title

• A62C35/68

  Details, e.g. of pipes or valve systems (valves in general F16K) · CPC title

• A62C35/62 Primary

  dry, i.e. empty of extinguishing material when not in use · CPC title

• A62C37/14

  with frangible vessels · CPC title