US3135331A - Dry adapter for fire-extinguishing sprinkler systems - Google Patents

Dry adapter for fire-extinguishing sprinkler systems Download PDF

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US3135331A
US3135331A US225696A US22569662A US3135331A US 3135331 A US3135331 A US 3135331A US 225696 A US225696 A US 225696A US 22569662 A US22569662 A US 22569662A US 3135331 A US3135331 A US 3135331A
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valve
pressure
casing
telltale
supply line
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Floyd J Lee
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/60—Pipe-line systems wet, i.e. containing extinguishing material even when not in use
    • A62C35/605—Pipe-line systems wet, i.e. containing extinguishing material even when not in use operating and sounding alarm automatically

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  • a dry adapter which may be filled with an inert gas at a selected pressure above supply line pressure, or may be filled or partially filled and pressurized with a liquid having a low freezing point.
  • FIGURE 1 is a fragmentary, substantially diagrammatical view illustrating one manner in which the dry adapter for fire-extinguishing, sprinkler systems may be installed, wherein the adapter and sprinkler projectdownwardly from a ceiling;
  • FIGURE 2 is a similar fragmentary, diagrammatical view, showing the adapter extending horizontally through a wall and the sprinkler depending therefrom;
  • FIGURE 3 is a similar fragmentary, diagrammatical view, showing the dry adapter extending horizontally and the sprinkler in an upstanding position;
  • FIGURE 4 is an enlarged, longitudinal, fragmentary, sectional view taken through 44 of FIGURE 1;
  • FIGURE 5 is a transverse, sectional view taken through 55 of FIGURE 4;
  • FIGURE 6 is a sectional view of the inlet plug shown in FIGURES 4 and 5, and illustrating the manner in which the inlet valve is supported during charging of the dry adapter;
  • FIGURE 7 is an exploded view showing the parts of the telltale valve structure.
  • the dry adapter for fire-extinguishing, sprinkler systems is arranged to be attached to a water supply line 1 by a T-fitting 2 or other conventional fitting.
  • the dry adapter includes a casing 3 which may be formed from a United States Patent 0 a length of pipe having pipe threads 4 at its extremity.
  • the casing 3 may extend downwardly from a fitting 2 through a wall 5 into a region wherein the temperature may drop below the freezing point of water.
  • the casing 3 may extend horizontally through a wall, as shown in FIGURES 2 and 3.
  • the extended end of the casing 3 receives a reducer fitting 6 or a reducer elbow 7 which may be confidential. That is, in either case, the reducer fitting 6 or reducer elbow 7 is provided with an internally screw-threaded end so as to form a tightly sealed connection with the casing 3, and a reduced end also internally screw-threaded arranged to form a tightly sealed connection with a conventional sprinkler head 8, of the type which incorporates a fuse.
  • the inlet end of the casing 3 is internally screwthreaded to sealingly receive an inlet plug 9.
  • the inlet plug is provided with an offset bore 10.
  • the axially inner end of the bore 10 forms a seat which is closed by an inlet check valve 11 having a tapered seat 12.
  • the inlet check valve 11 extends inwardly from the inlet plug 9 and is provided with a cross bore which receives a mounting wire 13.
  • the mounting wire 13 is L-shaped to form a laterally extending end which extends transversely through a screw pin 14, screw-threaded into the inlet plug 9 at one side of the bore 10.
  • the reducer fitting 6 or reducer elbow 7 is modified slightly by providing a fiat area on one side.
  • a screwthreaded bore is formed through the fitting and the end of the casing 3 therein, as shown in FIGURE 4.
  • the screw-threaded bore thus formed receives an internally screw-threaded fitting 15 having a bore 16 counterborcd at its inner end, and forming a valve seat which is closed by a telltale valve element 17.
  • the valve element 17 is provided with a head 18 sealingly engaging the bore 16, and a stem 19 projects into the bore 16.
  • the stem 19 is provided with a transverse opening through which is threaded a pull wire 21 the ends of which initially extend outwardly through the fitting 15.
  • a spring 21 is located within the screwthreaded fitting 15 and bears against the valve element 17, tending to lift the valve element from its seat.
  • valve element 17 The screw-threaded fitting 15, valve element 17, and associated parts form a telltale valve unit.
  • a screw-threaded stem 22 is inserted into the inlet valve 11 through the bore 10.
  • the stem 22 is mounted within a sleeve 23, which in turn is fitted within the bore 10 and is provided with a shoulder 24.
  • the stem 22 is provided with a head 25 and a spring 26 bears against the head 25.
  • An internal shoulder 27 is provided within the sleeve 23 so as to hold the inlet valve 11 in yieldable engagement with the bore 10.
  • the dry adapter structure is assembled by connecting the reducer fitting 6 or the reducing elbow 7 with the casing 3 and connecting the sprinkler head '8 therewith, and in addition inserting the assembled inlet plug unit as well as the telltale valve unit.
  • the inlet valve 11 is equipped with the stem 22 and sleeve 23.
  • the inlet head of the casing 3 is then connected to a source of pressure fluid which is forced into the casing 3 through the inlet valve 11, it being understood that the stem 22 and sleever 23 fit sufficiently loose to permit flow of the pressure fluid into the casing 3.
  • the pressure fluid may be an inert gas or may be a liquid having a low freezing point, or may be a liquid and gas mixture. In any case, the fluid is such that it will not freeze at the temperatures to which the sprinkler head 8 may be subjected.
  • the pressure at which the casing 3 is charged is substantially above the line pressure of the water supply system to which the dry adapter is to be attached. For example, if the line pressure is 100 pounds, the casing 3 would be pressurized to 200 pounds.
  • the pull Wire or wires 20 are held manually or by a suitable tool as to maintain the valve element 17 closed against the force of the spring 21, until the internal pressure is suflicient to maintain the valve element 17 closed. Thereafter, the pull wire 24) is clipped, as indicated in FIGURE 4, or pulled free of the valve element 17.
  • the sleeve 23 and stem 22 are removed.
  • the dry adapter is installed by screw-threading the upper end containing the inlet plug 9 into a water supply system. Should any leak occur at any of the joints confronting the interior of the casing 3, or should the sprinkler leak or should the telltale valve element 13 leak, or should the inlet valve 11 leak back into the water supply line 1, the pressure within the casing 3 will drop to the pressure at the supply line 1.
  • the force of the spring 21 is so calculated that it will open the telltale valve at some pressure above the line pressure.
  • the telltale valve may be designed to open at 125 pounds. Once the telltale valve opens, the internal pressure will continue to drop to a point below line pressure, causing the inlet valve 11 to open. Sufficient water will flow out visually to indicate malfunctioning of the dry adapter.
  • the pressure fluid may include a liquid containing a dye to make more apparent any flow through the telltale valve.
  • the fuse which normally holds the sprinkler closed, gives way so that the sprinkler opens.
  • the pressure in the casing 3 rapidly drops so that the inlet valve 11 quickly opens and allows the Water to flow to and through the sprinkler.
  • the telltale valve may open, but the dimensions of the bore through the telltale valve are such that the amount of water lost through the telltale valve in no'way interferes with the functioning of the sprinkler.
  • a dry adapter for fire-extinguishing, sprinkler systems having a water supply line and sprinkler heads said adapter comprising:
  • a dry adapter for fire-extinguishing, sprinkler systems having a water supply line and sprinkler heads said adapter comprising:
  • a telltale check valve responsive to pressure in said (5) other means is N for l closflg casing to close said bare and a spring tending to said telltale check valve during pressunzmg of said open said telltale check valve when the fluid pressure 5 casmg' in said casingdrops belowa predetermined value.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Description

June 2, 1964 F. J. LEE 3,135,331
DRY ADAPTER FOR FIRE-EXTINGUISHING SPRINKLER SYSTEMS Filed Sept. 24, 1962 INVENTOR. fZ'a/p L/ LEE 3,135,331 DRY ADAPTER FOR FIRE-EXTHNGUISEHNG SPRENKLER SYSTEMS Floyd J. Lee, 119 N. Yale St, Fullerton, Calif. Filed Sept. 24, 1962, Ser. No. 225,696 6 Claims. (Cl. 169-17) This invention relates to dry adapters for fire-extinguishing sprinkler systems, and included in the objects of this invention are:
First, to provide a water-free or dry adapter which is connected to a water-filled, fire-extinguishing system so as to extend from the supply lines of the system maintained above freezing temperatures into regions which may be maintained below freezing temperatures, such though primarily adapted to carry a single sprinkler head, may be arranged to carry several.
' Fourth, to provide a dry adapter which may be filled with an inert gas at a selected pressure above supply line pressure, or may be filled or partially filled and pressurized with a liquid having a low freezing point.
Fifth, to provide a dry adapter which incorporates a telltale or bleed valve operable at a predetermined pressure above line pressure so that, in the event of leakage from the adapter to the supply line, the bleed valve will open as a warning of such leakage; and wherein, should the bleed valve or sprinkler itself leak, the pressure in the adapter will drop to cause full opening of the bleed valve, thus creating in either case a warning condition which will demand attention.
Sixth, to provide a dry adapter which, on sudden release of pressure, such as caused by collapse of the fuse assembly of the sprinkler head, ensures prompt delivery of water from the water supply system.
With the above and other objects in view, as may appear hereinafter, reference is directed to the accompanying drawings in which:
FIGURE 1 is a fragmentary, substantially diagrammatical view illustrating one manner in which the dry adapter for fire-extinguishing, sprinkler systems may be installed, wherein the adapter and sprinkler projectdownwardly from a ceiling;
FIGURE 2 is a similar fragmentary, diagrammatical view, showing the adapter extending horizontally through a wall and the sprinkler depending therefrom;
FIGURE 3 is a similar fragmentary, diagrammatical view, showing the dry adapter extending horizontally and the sprinkler in an upstanding position;
FIGURE 4 is an enlarged, longitudinal, fragmentary, sectional view taken through 44 of FIGURE 1;
FIGURE 5 is a transverse, sectional view taken through 55 of FIGURE 4;
FIGURE 6 is a sectional view of the inlet plug shown in FIGURES 4 and 5, and illustrating the manner in which the inlet valve is supported during charging of the dry adapter;
FIGURE 7 is an exploded view showing the parts of the telltale valve structure.
The dry adapter for fire-extinguishing, sprinkler systems is arranged to be attached to a water supply line 1 by a T-fitting 2 or other conventional fitting. The dry adapter includes a casing 3 which may be formed from a United States Patent 0 a length of pipe having pipe threads 4 at its extremity.
The casing 3 may extend downwardly from a fitting 2 through a wall 5 into a region wherein the temperature may drop below the freezing point of water. Alternatively, the casing 3 may extend horizontally through a wall, as shown in FIGURES 2 and 3.
The extended end of the casing 3 receives a reducer fitting 6 or a reducer elbow 7 which may be confidential. That is, in either case, the reducer fitting 6 or reducer elbow 7 is provided with an internally screw-threaded end so as to form a tightly sealed connection with the casing 3, and a reduced end also internally screw-threaded arranged to form a tightly sealed connection with a conventional sprinkler head 8, of the type which incorporates a fuse. i
The inlet end of the casing 3 is internally screwthreaded to sealingly receive an inlet plug 9. The inlet plug is provided with an offset bore 10. The axially inner end of the bore 10 forms a seat which is closed by an inlet check valve 11 having a tapered seat 12.
The inlet check valve 11 extends inwardly from the inlet plug 9 and is provided with a cross bore which receives a mounting wire 13. The mounting wire 13 is L-shaped to form a laterally extending end which extends transversely through a screw pin 14, screw-threaded into the inlet plug 9 at one side of the bore 10. p
The reducer fitting 6 or reducer elbow 7 is modified slightly by providing a fiat area on one side. A screwthreaded bore is formed through the fitting and the end of the casing 3 therein, as shown in FIGURE 4. The screw-threaded bore thus formed receives an internally screw-threaded fitting 15 having a bore 16 counterborcd at its inner end, and forming a valve seat which is closed by a telltale valve element 17.
The valve element 17 is provided with a head 18 sealingly engaging the bore 16, and a stem 19 projects into the bore 16. The stem 19 is provided with a transverse opening through which is threaded a pull wire 21 the ends of which initially extend outwardly through the fitting 15. A spring 21 is located within the screwthreaded fitting 15 and bears against the valve element 17, tending to lift the valve element from its seat.
The screw-threaded fitting 15, valve element 17, and associated parts form a telltale valve unit.
With reference again to the inlet valve 11, initially a screw-threaded stem 22 is inserted into the inlet valve 11 through the bore 10. The stem 22 is mounted within a sleeve 23, which in turn is fitted within the bore 10 and is provided with a shoulder 24. The stem 22 is provided with a head 25 and a spring 26 bears against the head 25. An internal shoulder 27 is provided within the sleeve 23 so as to hold the inlet valve 11 in yieldable engagement with the bore 10.
Operation of the dry adapter for fire-extinguishing, sprinkler systems is as follows:
The dry adapter structure is assembled by connecting the reducer fitting 6 or the reducing elbow 7 with the casing 3 and connecting the sprinkler head '8 therewith, and in addition inserting the assembled inlet plug unit as well as the telltale valve unit.
In the initial assembly, the inlet valve 11 is equipped with the stem 22 and sleeve 23. The inlet head of the casing 3 is then connected to a source of pressure fluid which is forced into the casing 3 through the inlet valve 11, it being understood that the stem 22 and sleever 23 fit sufficiently loose to permit flow of the pressure fluid into the casing 3.
The pressure fluid may be an inert gas or may be a liquid having a low freezing point, or may be a liquid and gas mixture. In any case, the fluid is such that it will not freeze at the temperatures to which the sprinkler head 8 may be subjected.
The pressure at which the casing 3 is charged is substantially above the line pressure of the water supply system to which the dry adapter is to be attached. For example, if the line pressure is 100 pounds, the casing 3 would be pressurized to 200 pounds. During the course of charging the dry adapter, the pull Wire or wires 20 are held manually or by a suitable tool as to maintain the valve element 17 closed against the force of the spring 21, until the internal pressure is suflicient to maintain the valve element 17 closed. Thereafter, the pull wire 24) is clipped, as indicated in FIGURE 4, or pulled free of the valve element 17. After the dry adapter has been pressurized, the sleeve 23 and stem 22 are removed.
The dry adapter is installed by screw-threading the upper end containing the inlet plug 9 into a water supply system. Should any leak occur at any of the joints confronting the interior of the casing 3, or should the sprinkler leak or should the telltale valve element 13 leak, or should the inlet valve 11 leak back into the water supply line 1, the pressure within the casing 3 will drop to the pressure at the supply line 1.
The force of the spring 21 is so calculated that it will open the telltale valve at some pressure above the line pressure. For example, in the condition given previously, the telltale valve may be designed to open at 125 pounds. Once the telltale valve opens, the internal pressure will continue to drop to a point below line pressure, causing the inlet valve 11 to open. Sufficient water will flow out visually to indicate malfunctioning of the dry adapter.
If desired, the pressure fluid may include a liquid containing a dye to make more apparent any flow through the telltale valve.
In the event of a fire, the fuse, which normally holds the sprinkler closed, gives way so that the sprinkler opens. The pressure in the casing 3 rapidly drops so that the inlet valve 11 quickly opens and allows the Water to flow to and through the sprinkler. At this time the telltale valve may open, but the dimensions of the bore through the telltale valve are such that the amount of water lost through the telltale valve in no'way interferes with the functioning of the sprinkler.
While a particular embodiment of this invention has been shown and described, it is not intended to limit the same to the exact details of the construction set forth, and it embraces such changes, modifications, and equivalents of the parts and their formation and arrangement as come within the purview of the appended claims.
What is claimed is:
l. A dry adapter for fire-extinguishing, sprinkler systems having a water supply line and sprinkler heads, said adapter comprising: 7 I
(a) a hollow casing having an inlet end for connection to said supply line and an outlet end for connection to a sprinkler head;
(b) a pressure fluid contained in said casing at a pressure above the normal pressure at said supply line;
() acheck valve in the inlet end of said casing for admitting water thereto, said check valve being held closed against the pressure in said supply line by reason of the pressure exerted by said pressure fluid;
(d) a telltale valve disposed in a wall of said casing, and also maintained in its closed position by said pressure fluid;
(e) and a spring operable to open said telltale valve in the event the pressure of said pressure fluid drops below a predetermined value, thereby to cause flow of detectable fluid from said telltale valve.
2. A dry adapter for fire-extinguishing, sprinkler systems having a water supply line and sprinkler heads, said adapter comprising:
(a) a hollow casing havingan inlet end for connection to said supply line and an outlet end for connection to a sprinkler head;
(b) a pressure fluid contained in said casing at a pressure above the normal pressure at said supply line;
(0) a check valve in the inlet end of said casing for admitting water thereto, said check valve being held closed against the pressure in said supply line by reason of the pressure exerted by said pressure fluid;
(d) a telltale valve bore in said casing at said outlet end at one side of its connection to said sprinkler head;
(e) a telltale valve in said bore and maintained in its closed position by said pressure fluid;
(f) and a spring operable to open said telltale valve in the event the pressure of said pressure fluid drops below a predetermined value, thereby to cause flow of detectable fluid from said telltale valve.
3. A dry adapter for fire-extinguishing, sprinkler systems having a water supply line and sprinkler heads, said 15 adapter comprising:
(a) a hollow casing having an inlet end for connection to said supply line and an outlet end for connection to a sprinkler head;
(b) a pressure fluid contained in said casing at a pressure above the normal pressure at said supply line;
(c) a check valve in the inlet end of said casing for admitting water thereto, said check valve being held closed against the pressure in said supply line by reason of the pressure exerted by said pressure fluid;
(d) a telltale valve bore in said casing at said outlet end at one side of its connection to said sprinkler head;
(e) a telltale valve in said bore and maintained in its closed position by said pressure fluid;
(f) a'spring operable to open said telltale valve in the event the pressure of said pressure fluid drops below a predetermined value, thereby to cause flow of detectable fluid from said telltale valve;
(g) and a tension means attached to said telltale valve and initially extending through said casing for drawing said telltale valve to its closed position against the action of said spring prior to pressurizing said casing.
4. A dry adapter for fire-extinguishing, sprinkler sys- 4 terms having a water supply line and sprinkler heads, said adapter comprising: 7 g
(a) a tubular casing having an inlet end for connection to said supply line and an outlet end;
(b) means at said inlet end forming an inlet port hav- H ing a valve seat facing into said casing;
49 (c) an inlet valve closing said valve seat and movable into said casing for admitting water from said supply line;
(d) a fitting at the'outlet end of said casing adapted for connection to a sprinkler head;
50 (e) means defining a telltale valve bore at the outlet portion of said casing;
(f) a telltale valve in said valve bore, and having a head within said casing for sealing engagement with said a bore; 5
(g) means for filling said casing with a fluid to a pres- 1 sure above the pressure in said supply line to hold both said inlet valve and said telltale valve closed;
(h) and a spring operable to open said telltale valve in the event of leakage of said fluid and consequent re- 69 duction in pressure to a predetermined value between its initial pressure and said supply line pressure.
5. A dry adapter for fire-extinguishing, sprinkler systems having a water supply line and sprinkler heads, said adapter comprising:
(a) a tubular casing having an inlet end screw-threaded for connection to a Water supply line, and an outlet end;
(1)) a plug sealed in said inlet end and having an inlet bore;
7 O (c) an inlet check valve within said casing for closing said bore against backfiow from said casing to said supply line;
(01 a fitting at said outlet end adapted to receive a thermally operable sprinkler head;
(e) and a telltale valve unit disposed in a wall of said casing, and including a check valve bore of small (a) yieldable means is provided for initially closing diameter for limited flow of liquid from said casing, Said inlet check Valvfl;
a telltale check valve responsive to pressure in said (5) other means is N for l closflg casing to close said bare and a spring tending to said telltale check valve during pressunzmg of said open said telltale check valve when the fluid pressure 5 casmg' in said casingdrops belowa predetermined value. References Clted m the me of thls patent 6. A dry adapter for fire-extinguishing, sprinkler sys- UNITED STATES PATENTS 1,903,150 Tyden Mar. 22, 1933 terns as set forth in claim 5, wherein:

Claims (1)

1. A DRY ADAPTER FOR FIRE-EXTINGUISHING, SPRINKLER SYSTEMS HAVING A WATER SUPPLY LINE AND SPRINKLER HEADS, SAID ADAPTER COMPRISING: (A) A HOLLOW CASING HAVING AN INLET END FOR CONNECTION TO SAID SUPPLY LINE AND AN OUTLET END FOR CONNECTION TO A SPRINKLER HEAD; (B) A PRESSURE FLUID CONTAINED IN SAID CASING AT A PRESSURE ABOVE THE NORMAL PRESSURE AT SAID SUPPLY LINE; (C) A CHECK VALVE IN THE INLET END OF SAID CASING FOR ADMITTING WATER THERETO, SAID CHECK VALVE BEING HELD CLOSED AGAINST THE PRESSURE IN SAID SUPPLY LINE BY REASON OF THE PRESSURE EXERTED BY SAID PRESSURE FLUID; (D) A TELLTALE VALVE DISPOSED IN A WALL OF SAID CASING, AND ALSO MAINTAINED IN ITS CLOSED POSITION BY SAID PRESSURE FLUID; (E) AND A SPRING OPERABLE TO OPEN SAID TELLTALE VALVE IN THE EVENT THE PRESSURE OF SAID PRESSURE FLUID DROPS BELOW A PREDETERMINED VALUE, THEREBY TO CAUSE FLOW OF DETECTABLE FLUID FROM SAID TELLTALE VALVE.
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US4220208A (en) * 1977-11-21 1980-09-02 Hays Heating & Plumbing Company Dry pipe fire extinguishing sprinkler system
US20030075343A1 (en) * 2001-10-22 2003-04-24 National Foam, Inc., D/B/A Kidde Fire Fighting Dry sprinkler
US20050173562A1 (en) * 2004-02-09 2005-08-11 Franson Scott T. Dry sprinkler assembly
US20060113093A1 (en) * 2004-12-01 2006-06-01 Tyco Fire Products Lp Dry sprinkler with a diverter seal assembly
US20070169946A1 (en) * 2004-11-29 2007-07-26 Tyco Fire Products Lp Dry sprinkler installation and sealing device
US20080266800A1 (en) * 2007-04-30 2008-10-30 Lankston Robert J Heat sink with surface-formed vapor chamber base
US7516800B1 (en) 2002-07-19 2009-04-14 Tyco Fire Products Lp Dry sprinkler
US20100212918A1 (en) * 1998-05-15 2010-08-26 Tyco Fire Products Lp Early suppression fast response fire protection sprinkler
US8122969B1 (en) 2000-11-22 2012-02-28 Tyco Fire Products Lp Low pressure, extended coverage, fire protection sprinkler
US8327946B1 (en) 2002-07-19 2012-12-11 Tyco Fire Products Lp Dry sprinkler
US20120318536A1 (en) * 2011-05-31 2012-12-20 Minimax Gmbh & Co. Kg Device For Triggering A Fire Extinguishing System By Means Of A Sprinkler
US9339673B2 (en) 2011-05-27 2016-05-17 Victaulic Company Flexible dry sprinkler
US9345918B2 (en) 2012-12-20 2016-05-24 Victaulic Company Dry sprinkler
US9358411B2 (en) 2011-05-27 2016-06-07 Victaulic Company Flexible dry sprinkler
US9415250B2 (en) 2012-12-20 2016-08-16 Victaulic Company Dry sprinkler
US10449402B2 (en) 2012-12-20 2019-10-22 Victaulic Company Dry sprinkler
US20210128959A1 (en) * 2012-06-01 2021-05-06 The Reliable Automatic Sprinkler Co. Inc. Flexible dry sprinkler
US12029929B2 (en) 2020-09-08 2024-07-09 Victaulic Company Flexible dry sprinkler

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US1903150A (en) * 1932-04-04 1933-03-28 Tyden Emil Pendant sprinkler system

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Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220208A (en) * 1977-11-21 1980-09-02 Hays Heating & Plumbing Company Dry pipe fire extinguishing sprinkler system
US8485270B2 (en) 1998-05-15 2013-07-16 Tyco Fire Products Lp Early suppression fast response fire protection sprinkler
US8186448B2 (en) 1998-05-15 2012-05-29 Tyco Fire Products Lp Early suppression fast response fire protection sprinkler
US20100212918A1 (en) * 1998-05-15 2010-08-26 Tyco Fire Products Lp Early suppression fast response fire protection sprinkler
US8176988B2 (en) 1998-05-15 2012-05-15 Tyco Fire Products Lp Early suppression fast response fire protection sprinkler
US8122969B1 (en) 2000-11-22 2012-02-28 Tyco Fire Products Lp Low pressure, extended coverage, fire protection sprinkler
US8657020B1 (en) 2000-11-22 2014-02-25 Tyco Fire Products Lp Low pressure, extended coverage, fire protection sprinkler
US8899341B1 (en) 2000-11-22 2014-12-02 Tyco Fire Products Lp Low pressure, extended coverage, fire protection sprinkler
US8839877B1 (en) 2000-11-22 2014-09-23 Tyco Fire Products Lp Low pressure, extended coverage, fire protection sprinkler
US8925641B1 (en) 2000-11-22 2015-01-06 Tyco Fire Products Lp Low pressure, extended coverage, fire protection sprinkler
US20030075343A1 (en) * 2001-10-22 2003-04-24 National Foam, Inc., D/B/A Kidde Fire Fighting Dry sprinkler
US7516800B1 (en) 2002-07-19 2009-04-14 Tyco Fire Products Lp Dry sprinkler
US8469112B1 (en) 2002-07-19 2013-06-25 Tyco Fire Products Lp Dry sprinkler
US9636531B1 (en) 2002-07-19 2017-05-02 Tyco Fire Products Lp Dry sprinkler
US8746356B1 (en) 2002-07-19 2014-06-10 Tyco Fire Products Lp Dry Sprinkler
US10195473B1 (en) 2002-07-19 2019-02-05 Tyco Fire Products Lp Dry sprinkler
US8327946B1 (en) 2002-07-19 2012-12-11 Tyco Fire Products Lp Dry sprinkler
US8528653B1 (en) 2002-07-19 2013-09-10 Tyco Fire Products Lp Dry sprinkler
US7802628B1 (en) 2002-07-19 2010-09-28 Tyco Fire Products Lp Dry sprinkler
US10220231B2 (en) 2004-02-09 2019-03-05 The Viking Corporation Dry sprinkler assembly
US8636075B2 (en) 2004-02-09 2014-01-28 The Viking Corporation Dry sprinkler assembly
US10512808B2 (en) 2004-02-09 2019-12-24 The Viking Corporation Dry sprinkler assembly
US20050173562A1 (en) * 2004-02-09 2005-08-11 Franson Scott T. Dry sprinkler assembly
US20070169946A1 (en) * 2004-11-29 2007-07-26 Tyco Fire Products Lp Dry sprinkler installation and sealing device
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US11389679B2 (en) 2012-12-20 2022-07-19 Victaulic Company Dry sprinkler
US10449402B2 (en) 2012-12-20 2019-10-22 Victaulic Company Dry sprinkler
US9415250B2 (en) 2012-12-20 2016-08-16 Victaulic Company Dry sprinkler
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