Protected fire protection sprinkler and tool assemblies

Abstract

Protected sprinkler assembly (10), comprising: a fire protection sprinkler (100) with a frame (102) and a fluid deflector (122) connected to the frame, wherein the frame has a body (104) defining an inlet (106), an outlet (108) and an internal passage extending along a sprinkler axis from the inlet to the outlet; a support shell (200) with an end cap (202) having a central opening (206) arranged around the body and a plurality of openings (208) arranged radially around the central opening, the support shell having an open receiving end (204) opposite the end cap to define a shell chamber (203) centered about a central shell axis, the plurality of openings being angularly spaced around the shell axis to define a first arc length around the shell axis between two angularly adjacent spaced openings; and a protective cap (300) comprising a tubular element with a first end (302), an opposite second end (304), and an inner deflector plate (306) held in the tubular element and spaced from the first end to define a cap chamber (303) centered about a cap axis, the protective cap engaging with the support shell to define an internal volume of the sprinkler assembly between the end cap and the inner deflector plate, the inner deflector plate defining a plurality of slots (308) in fluid communication with the internal volume to define a toolpath therethrough, each slot in the plurality of slots defining a slot length extending over a second arc length about the cap axis that is greater than the first arc length between the two angularly adjacent openings of the plurality of openings of the support shell.

Description

[0001] The present invention relates generally to the protection of fire sprinklers and, more particularly, to protected sprinkler assemblies for protecting operating components of the sprinkler and to tools for installing and handling the protected sprinkler assemblies.

[0002] Fire sprinklers generally include a sprinkler frame for installation, with the sprinkler frame inlet connected to an extinguishing fluid supply pipe, and a fluid deflector connected to the frame for dispersing the extinguishing fluid exiting the sprinkler frame outlet. Automatic fire sprinklers include a seal assembly located in the frame outlet to control fluid discharge and a heat-responsive actuation assembly to assist the seal and define a non-actuated state of the sprinkler. Concealed sprinklers include a cover plate assembly that protects the installed sprinkler from view.

[0003] A special form of automatic concealed sprinkler is the concealed flat-plate sprinkler. In such an arrangement, the actuator and deflector are concealed between a support cup and the cover plate attached to the support cup. The support cup is centered over the sprinkler frame, with a corrugated annular wall surrounding the sprinkler frame. The cover plate assembly includes a retaining ring and a cover plate attached to the retaining ring by heat-sensitive solder. The retaining ring engages the annular wall of the support cup to secure the cover plate assembly to the support cup and conceals the deflector and actuating component between the support cup and the cover plate assembly. The cover plate supports the deflector in a retracted position.With sufficient heat, the cover plate solder melts, and the cover plate separates from the retaining ring, allowing the diverter to be lowered and the sprinkler actuator to operate the sprinkler. A commercial example of such a concealed pendent sprinkler is the Freedom® Residential Concealed Pendent Sprinkler VK498 (K5.8) from Viking Group, Inc. of Caledonia, Michigan, described in Technical Data Form F_112817 Rev 20.2 (June 26, 2020). Other examples of concealed pendent sprinklers are shown and described in U.S. Patent No. 8,794,340 and U.S. Patent Publication No. 2017 / 0296852.

[0004] The cover plate assembly also obscures the sprinkler frame's sprinkler assembly tool engagement features, making handling and installation of the sprinkler difficult. Accordingly, during sprinkler installation, the cover plate can be removed to expose the sprinkler frame for tool access. However, exposing the sprinkler frame for handling also exposes the operating components, which could be damaged. Once installation is complete without damage to the sprinkler, the cover plate is reattached to the support cup. Because the cover plate is a brazed assembly, the cover plate alone does not provide the best protection for the sprinkler's deflector and other operating components when it is being stored, transported, or handled, or when waiting to place the sprinkler into service.

[0005] There are known protective devices or caps used to protect concealed sprinklers. Examples of such protective caps are illustrated and described in U.S. Patent Nos. 9,463,343 and 9,630,039. These protective caps remain in place during handling and installation and allow tool access even when in place. Furthermore, these patent documents describe tools that work in conjunction with the protective caps to install the protected sprinkler or remove the protective cap. However, these known protective devices have a complex design, which can make their use difficult or, at the very least, cumbersome to install and use.

[0006] For example, U.S. Patent No. 9,463,343 shows and describes a protective cap comprising an inner cylinder and an outer cylinder concentrically connected in a double-walled arrangement. The protective cap is inserted into a cylindrical member or support shell disposed around the sprinkler such that the inner cylinder of the protective cap surrounds the sprinkler. The inner cylinder of the protective cap includes axially extending tongue portions that extend through openings formed in the flat end of the support shell, which is disposed over a polygonal tool-engaging portion of the sprinkler. The inner and outer cylinders are connected by connecting side surfaces that extend axially between the tongues.To install the protected sprinkler, an installation tool must be inserted outside the inner cylinder into the space or openings between the inner and outer cylinders, along the tabs and between the side connectors, and through the opening in the flat end of the support cup. Rotation of the tool results in simultaneous rotation of the protective cap, support cup, and sprinkler. One issue with this dual-walled protective cap is the need to adjust and possibly readjust the tool to ensure the installation tool is properly guided through the openings in the cap and support cup to rotate the sprinkler.

[0007] U.S. Patent No. 9,463,343 and U.S. Patent No. 9,630,039 each describe other protective caps consisting of a single wall or cylinder, wherein the inserted end of the protective cap has axially extending projections or tabs that extend through the openings in the end of the surrounding sprinkler support cup. U.S. Patent No. 9,630,039 also describes protective caps in which the inserted end does not engage the openings formed in the end of the support cup and instead is disposed inside the support cup at a distance from the end of the support cup. Regardless of the design of the male end of the protective cap, the opposite or lower end of the protective caps in U.S. Patent No. 9,463,343 and U.S. Patent No. 9,630,039 has radially arranged and angularly spaced holes or openings into which an installation tool is inserted to simultaneously rotate the protective cap, the support cup, and the sprinkler.In these protective caps, the number and location of holes in the lower end of the cup correspond to the number and location of the openings formed in the end of the support cup. U.S. Patent No. 9,630,039 describes the holes in the cap as a guide for the installation tool to the openings in the support cup when there are no axially extending projections or tabs on the insertion end. U.S. Patent No. 9,630,039 further describes the use of a clear film to adjust and visually confirm the alignment between the holes in the cap and the openings in the support cup, which can complicate the construction and use of the support cup. Another protective cap, shown in U.S. Patent No. 9,630,039, is spaced radially inward from the inner surface of the support cup when installed around the sprinkler.The gap between the protective cap and the inner surface of the support shell can expose the inner surface of the support shell to external influences, such as paint splashes during installation or construction. Paint on the inner surface of the support shell can interfere with the proper installation and / or operation of a cover plate assembly.

[0008] Accordingly, there is still a need for simplified and differently designed protective devices and tools for the protection, handling, installation and storage of fire sprinklers and, in particular, for protective devices and tools for the protection of automatic concealed fire sprinklers.

[0009] Preferred protection and installation devices provide for a protected fire sprinkler assembly. Preferred assemblies include a fire sprinkler having a sprinkler frame with a body and a tool engagement portion for connection to a fluid supply pipe, and a fluid deflector connected to the sprinkler frame. A support shell is disposed around the sprinkler body and radially surrounds the fluid deflector. The support shell includes an end cap, preferably having a plurality of openings. Preferred embodiments of the protected sprinkler assembly include a preferred protective cap for protecting the operating components of the sprinkler during storage, transport, installation, and in anticipation of commissioning. The preferred protective cap engages the support shell to enclose the sprinkler components therebetween within a defined internal volume.The protective cap is preferably a tubular member, and an inner baffle is preferably formed or supported within the tubular member, defining the preferred internal volume with the end cap of the support shell. Preferably, one or more slots are formed between the inner baffle and an inner surface of the tubular member in fluid communication with the internal volume to define a preferred tool path for inserting tools to access tool engaging portions of the sprinkler assembly. In a preferred aspect, the tubular member minimizes or limits insertion of the protective cap into the support shell such that the inserted end of the cap is spaced or distanced from the openings in the end cap of the support shell.In a particularly preferred aspect, the protective cap comprises an outer shelf that abuts the support shell and minimizes or limits insertion of the protective cap. In another preferred aspect, the protective cap is formed with a single annular or tubular wall construction.

[0010] A preferred protected sprinkler assembly comprises a fire protection sprinkler having a frame and a fluid deflector connected to the frame. The frame includes a body defining an inlet, an outlet, and an internal passage extending along a sprinkler axis from the inlet to the outlet. A support cup having an end cap with a central opening and a plurality of openings arranged around the central opening is arranged around the body. The support cup includes an open receiving end opposite the end cap to define a cup chamber centered about a central cup axis. The openings are preferably angularly spaced about the cup axis to define a first arc length about the cup axis between two angularly adjacent spaced openings. The protected sprinkler assembly includes a preferred protective cap.The protective cap preferably comprises a tubular member having a first end, an opposite second end, and an inner baffle spaced from the first end to define a cap chamber centered about a cap axis. The protective cap is connected to the support shell such that the shell chamber and the cap chamber are in fluid communication with each other to define an interior volume of the protected sprinkler assembly between the end cap and the inner baffle. The inner baffle preferably defines a plurality of slots in fluid communication with the interior volume to define a preferred tool path therethrough.Each slot in the plurality of slots is preferably arcuate to define a slot length extending a second arc length relative to the cap axis that is greater than the first arc length between the two angularly adjacent, spaced-apart openings of the support shell. In preferred embodiments, each slot of the preferred tool path defines a preferred slot length extending an arc of greater than 90 degrees relative to the cap axis.

[0011] Accordingly, a preferred embodiment of a protective cap for a fire sprinkler assembly is also provided. The protective cap preferably comprises a tubular member for engagement with a support shell having an end cap with a central opening centered about a shell axis and a plurality of openings angularly spaced about the central opening to define an arc length about the shell axis between two angularly spaced adjacent openings. The tubular member has an inner surface, an outer surface, and a first end and a second end spaced apart along a central cap axis. An inner baffle is formed in the tubular member, preferably axially spaced from the first end to define a cap chamber, the inner surface being centered about the cap axis.The preferred protective cap includes a plurality of slots formed between the inner baffle and the inner surface of the tubular member to define a tool path in fluid communication with an internal volume defined between the tubular member and the support shell. Each slot has a slot length extending an arc length relative to the shell axis that is preferably greater than the arc length between angularly adjacent openings of the support shell. In preferred embodiments, each slot defines a preferred slot length extending an arc of greater than 90 degrees relative to the cap axis.

[0012] A preferred method of protecting a sprinkler assembly is also provided, wherein the sprinkler assembly comprises a frame, a deflector, and a support shell disposed about the frame. The support shell preferably includes an end cap having a central opening centered about a shell axis and disposed about the sprinkler frame. The end cap preferably includes a plurality of openings angularly spaced about the central opening to define an arc length about the shell axis between two angularly spaced adjacent openings. The preferred method includes engaging a tubular member with the support shell to define an internal volume between the end cap of the support shell and an internal baffle within the tubular member, an internal surface of the tubular member circumscribing the sprinkler assembly.The preferred method also includes defining a tool path having a plurality of slots formed around the inner baffle. Each slot is in fluid communication with the inner chamber to provide access to a tool-engaging portion of the sprinkler assembly during installation of the sprinkler assembly. Furthermore, each slot in the plurality of slots has a slot length that extends an arc length relative to the shell axis that is greater than the arc length between the angularly adjacent openings of the plurality of openings of the support shell.

[0013] Preferred embodiments of the sprinkler frame include a body having an external thread and a tool engagement portion with a key boss defined by a perimeter formed by a plurality of flat surfaces below the external thread. In a preferred embodiment of the sprinkler, the tool engagement element includes a follower element disposed around the sprinkler body and secured to the inside of the surrounding support shell. The follower element has a central opening through which the frame body extends such that the key boss engages the central opening. The central opening of the follower element is defined by adjacent flat surfaces that form two or more surface contacts with the key boss of the sprinkler body. The follower element also includes an array of vane elements angularly spaced from one another around the central opening.The space formed between adjacent blade elements defines a tool engagement slot. The driver element is rotatably oriented within the support shell such that one or more of the tool engagement slots are axially aligned with an opening in the support shell. In preferred embodiments of the protected sprinkler assembly, the preferred protective cap avoids interference with the alignment and engagement of the tools with the support shell and the driver element by axially spacing the protective cap from the support shell and the driver element.

[0014] Preferred embodiments of the sprinkler are configured as a retractable sprinkler for protection in the protected assembly. The preferred sprinkler includes a frame having a pair of spaced-apart frame arms extending axially from the body, each preferably terminating in a boom at a fixed distance from the body. A through-bore extends axially through each boom to receive a pin member laterally outwardly of the frame arm in sliding engagement. A fluid deflector member is attached to the ends of the pin members and is axially displaceable with respect to the sprinkler frame to define a preferred retractable arrangement. Preferred embodiments of the sprinkler include a fixed trigger bracket or apex formed medially within the frame arms for positioning a thermally responsive trigger along the sprinkler axis and retaining a seal assembly within the outlet.

[0015] Preferred embodiments of the sprinkler assembly provide a protected, concealed sprinkler assembly comprising a surrounding support shell having a wall with an end cap and a receiving end axially spaced from the end cap. A preferred protective cap or cover plate assembly is engageable with the support shell. A preferred automatic fire sprinkler is received in the receiving end of the support shell. The preferred sprinkler includes a fluid deflector, a seal assembly, and a thermally responsive actuation assembly. The seal assembly is preferably retained in the outlet of the sprinkler body by the thermally responsive actuation assembly, which is preferably aligned along the sprinkler axis.The sprinkler frame preferably includes an apex centered along the sprinkler axis for receiving the thermally responsive actuation unit between a pair of spaced-apart frame arms diametrically opposed around the outlet. In preferred embodiments, the end portions of the frame arms are spaced from the outlet at a distance that is preferably greater than or equal to the distance of the preferred apex from the outlet. The frame arms also include a pair of extension members extending laterally inwardly to respectively interconnect the apex and the frame arms and form a frame window therebetween.The sprinkler includes a pair of pins, each pin being slidably received in one of the through-bores of the frame arms to define a retracted position and an extended position of the fluid deflector of the sprinkler, with one of the protective cap or cover plate assemblies supporting the fluid deflector in the retracted position.

[0016] A preferred tool for use with the preferred protected sprinkler assemblies includes a sprinkler wrench. The sprinkler wrench includes a base and two or more spaced-apart extension members extending axially from the base. The wrench is inserted into the protected sprinkler assembly along the preferred tool path. The wrench is further inserted axially such that one or more projection members formed on the end of the projection members engage one of the tool engagement portions of the sprinkler and an opening in the support cup. When the wrench is engaged with the driver member, rotation of the wrench can rotate the sprinkler frame into a pipe fitting through surface contact between the frame and the driver member.Through the connection between the support shell and the driver element as well as the protective cap, the driver element and the cap are rotated by the rotation of the engaging key.

[0017] Other preferred embodiments of a tool configured to cooperate with the protected sprinkler assembly include projections extending laterally from each of the extension members of the tool. The laterally extending projections are configured to form a preferred engagement notch with the extension member for engaging the preferred inner baffle of the protective cap. The preferred tool can be rotated clockwise or counterclockwise to enable bidirectional rotational engagement between the tool and the protective cap. The engagement between the tool and the protective cap positions the tool for removal of the protective cap by pulling the protective cap out of the support shell in either an axial or rotational direction.

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and, together with the general description given above and the detailed description given below, serve to explain the features of the invention. It should be understood that the preferred embodiments are some examples of the invention, as provided by the appended claims. Fig. 1A is a perspective view of a preferred embodiment of a protected sprinkler assembly. Fig. 1B is a cross-sectional view of the assembly of Fig. 1A. Fig. Figure 2 is an exploded perspective view of a preferred embodiment of a tool associated with the assembly of Fig. 1A is used. Fig. 3A-3D are various views of a preferred embodiment of a protective cap for use in the assembly of Fig. 1A. Fig. 4A-4B are various cross-sectional views of the sprinkler assembly and tool of Fig. 2. Fig. 5A-5C are various views of another preferred embodiment of a tool for use with the assembly of Fig. 1A. Fig. 6A-6C are various views of another preferred embodiment of a tool for use with the assembly of Fig. 1A. Fig. Figure 7A is an installed side view of the assembly of Fig. 1A. Fig. Figure 7B is an installed exploded partial cross-sectional side view of the sprinkler used in the assembly of Fig. 1A and is ready for use as a concealed sprinkler.

[0019] In Fig. 1A, a preferred protected sprinkler assembly 10 is illustrated for installation. The assembly 10 protects a sprinkler 100 and a surrounding support shell 200 with a preferred removable protective cap 300 engaged with the support shell 200. Generally, the protective cap 300 forms a cooperative engagement with the support shell 200 to enclose the operating components of the sprinkler 100 within an interior volume and to provide protection against adverse elements and accidental or inadvertent impacts during storage and handling, including during transportation and installation. Furthermore, the preferred protected assembly 10 is configured for installation, adjustment, and / or removal of the sprinkler 100 with the protective cap 300 in place to connect, reposition, and / or disconnect the protected sprinkler 100 with respect to a fluid supply pipe fitting.Accordingly, the preferred protective cap 300 is configured to cooperate with one or more tools for connecting the sprinkler 100 to a fluid supply pipe fitting or for disconnecting the sprinkler 100 therefrom. In a preferred aspect, the protective cap 300 defines a preferred tool path through the interior volume of the protected assembly to adjustably access a tool-engaging portion of the protected assembly to install or remove the sprinkler 100 from the fluid supply pipe fitting. Furthermore, the protective cap 300 cooperates with the support shell 200 and one or more tools in a manner that allows the protective cap to be selectively removed from the assembly 10 to place a connected sprinkler in a preferred concealed maintenance arrangement.

[0020] With reference to Fig. 1B, the sprinkler 100 includes a frame 102 having a body 104 defining an inlet 106, an outlet 108, and an internal passage extending along a sprinkler axis X--X from the inlet 106 to the outlet 108. The body 104 may have an external thread, such as an NPT male thread, for connection to a fluid supply pipe fitting. The frame may also include a pair of spaced-apart frame arms 110a, 110b, preferably disposed diametrically opposite the outlet 108 and extending axially away from the frame body 104 and the outlet 108. The sprinkler 100 of the protected sprinkler assembly 10 may be configured as an automatic sprinkler with a suitable sealing and actuating arrangement to control the discharge of firefighting fluid from the frame outlet. Alternatively, the sprinkler can be configured as a normally open sprinkler, where the extinguishing fluid supplied to the sprinkler inlet flows freely. Fig. The sprinkler 100 shown in Figure 1B is configured as an automatic sprinkler including, among other things, a seal assembly 112 retained in the outlet by a thermally responsive actuator 114 located between the frame arms 110a, 110b and preferably aligned along the central sprinkler axis X--X. The actuator 114 is preferably configured as a thermally responsive, fluid-filled, frangible glass bulb thermally designed to rupture at an elevated rated temperature to release the seal assembly 112 and actuate the sprinkler 100 to dispense a firefighting fluid. The trigger 114 may be mounted on a yoke or similar structure that bridges the frame arms 110a, 110b, such as shown in U.S. Patent 8,794,340 or U.S. Patent Application Publication No. 2017 / 0296852.In the embodiment shown, the trigger 114 is mounted on a trigger bracket or trigger apex 116 formed integrally with the frame arms 110a, 110b and centrally aligned along sprinklers X--X. A jackscrew 115 is threaded into the apex 116 to seat the piston and create a compressive force that is transmitted to the seal assembly 112 to seal the outlet 108. In the preferred embodiment shown, the frame arms 110a, 110b include a pair of extension members 117a, 117b that extend radially inward to each form a bridge between the apex 116 and the outer frame arms 110a, 110b. In addition, the apex 116 and the extension elements 117a, 117b form a connection between the frame arms 110a, 110b, which together with the body 104 form a frame window around the trigger 114.In a preferred embodiment of the frame 102, the extension elements 117a, 117b are preferably inclined with respect to the sprinkler axis X--X such that the frame window tapers narrowly in a direction away from the frame body 104.

[0021] Another operating component of sprinkler 100 includes a fluid deflector connected to the sprinkler frame to distribute the discharged extinguishing fluid in a desired pattern for fire protection. The fluid deflector may be positioned at a fixed distance from sprinkler outlet 18 or, alternatively, at a variable distance in a retractable or movable configuration. Fig. The assembly 10 shown in Figure 1B is an example of a sprinkler 100, preferably configured as a pendent sprinkler with a fold-down fluid deflector connected to the sprinkler frame 102 for concealed installation. Alternatively, the sprinkler 100 could be configured as a concealed horizontal sprinkler, with the deflector deploying horizontally in a sliding arrangement parallel to the floor or ceiling. Preferably, a laterally extending boom 118a, 118b is formed at the end of each frame arm 110a, 110b. In preferred embodiments of the sprinkler 100, the end pieces 118a, 118b are preferably arranged at an axial distance from the outlet 108 that is equal to or greater than the axial distance between the outlet 108 and the apex 116. Each boom formation 118a, 118b preferably extends laterally outwardly with respect to the axially extending frame arm 110a, 110b.A through-bore is formed in each boom 118a, 118b, into which a pin 120a, 120b is slidably received. The fluid deflection element 122 is secured to the sliding pins 120a, 120b to form the preferred operating component of a lowering assembly including a retracted position, as shown in FIG. Fig. 1B, in which the fluid deflection element 122 is located at a first distance from the outlet 108. The lowering arrangement also defines an extended position in which the sliding pins position the fluid deflection element 122 at a maximum distance from the outlet 108. In an installed, serviceable, concealed arrangement, the fluid deflection element 122 is secured in its retracted position by a thermally responsive cover plate assembly 500, such as that shown in Fig. 7B, which is attached to the support shell 200. In the preferred embodiment of the sprinkler assembly 100, the through-holes are preferably formed radially outward of the frame window. Accordingly, the pins 120a, 120b are separated from the actuator 114 by the frame arms 110a, 110b, so that the pins 120a, 120b move axially outward of the frame window.

[0022] In the Fig. 1A, Fig. 1B and Fig. 2, portions of the sprinkler frame 102, operating components of the sprinkler 100, including the deflector 122, are enclosed within an internal volume between the support shell 200 and the preferred protective cap 300. The support shell 200 is a generally cylindrical member having an end cap 202 and an open receiving end 204 opposite the end cap 202 to define a shell chamber 203 centered about a central shell axis Y--Y. The end cap 202 includes a central opening 206 which, together with the open receiving end 204 of the shell 200, coaxially receives the sprinkler 100. After receiving the sprinkler 100, the end cap 202 is arranged around the sprinkler body such that the shell 200 and its open receiving end 204 enclose the frame arms 110a, 110b and the fluid deflector 122, with the shell axis Y--Y coaxially aligned with the sprinkler axis X--X.In addition to the central opening 206, the end cap 202 preferably includes a group of openings 208 arranged around the central opening 206 and preferably arranged radially and angularly about the shell axis Y--Y to provide visual access, tool access, and / or heat flow access through the shell and sprinkler assembly. In preferred embodiments of the support shell 200, the openings 208 are angularly spaced about the shell axis Y--Y to define an arc length θ about the shell axis Y--Y between two angularly adjacent spaced openings 208. The preferred arc length θ may be defined by any spaced-apart portions of the adjacent openings 208.For example, the preferred arc length θ may be defined by the spaced-apart centers of the adjacent openings 208, as shown, or the preferred arc length θ may be defined by the spaced-apart corresponding side edges of the adjacent openings 208. One or more of the openings 208 may be located exclusively on the end cap 202 or, alternatively, may extend into and enclose the wall structure of the support tray 200 proximate the end cap 202. The wall structure of the support tray 200 is preferably corrugated and includes alternating ribs and grooves to receive and retain either the protective cap 300 described herein or a cover plate assembly to enclose the operating components of the sprinkler 100 therebetween.

[0023] Again referring to the Fig. 1A, 1B, 2, and 3A-3D, the preferred protective cap is generally a tubular member 300 having an inner surface 301a and an outer surface 302b centered about a central cap axis Z--Z. The tubular member 300 has a first end 302, a second end 304, with an inner baffle 306 formed or retained within the tubular member 300. The inner baffle 306 is axially spaced from the first end 302 and preferably formed between the first and second ends 302, 304 to define a cap chamber 303 centered about the cap axis Z--Z for receiving and protecting the sprinkler 100, or at least a portion thereof.The inner baffle 306 preferably defines one or more internal slots 308 in fluid communication with the chamber 303, and preferably defines the internal slot(s) 308 between the inner baffle 306 and the inner wall or surface 301a of the protective tubular cap member 300. Preferred embodiments of the cap 300 preferably include a pair of slots 308 formed about the inner baffle 306 and the central shell axis Z--Z. With particular reference to FIG. Fig. 1B, in the protected sprinkler assembly 10, the protective cap 300 is engaged with the support shell 200, with a portion of the cap disposed within the support shell 200 and axially spaced from the end cap 202 of the support shell 200. In particular, the first end 302 of the tubular member 300 is disposed within the support shell 200 and preferably axially spaced from the openings 208 of the end cap 202. The preferred engagement between the support shell 200 and the protective cap combines their respective chambers 203, 303 so that they are in fluid communication with each other and define an interior volume of the assembly 10 between the end cap 202 of the support shell 200 and the inner baffle 306 of the protective cap 300 to enclose the operating components of the sprinkler 100.

[0024] Furthermore, the preferred slot(s) 308 defined by the inner baffle 306 are in fluid communication with the chamber 303 and are also in fluid communication with the interior volume of the assembly 10 to define a preferred tool path in which an inserted tool can be adjusted within the tool cap to access tool-engaging elements of the assembly 10. Accordingly, a tool inserted axially through the slot(s) 308 can extend through the interior volume of the assembly 10; and within the interior volume, the tool can be adjusted or manipulated without unnecessarily rotating or adjusting the cap 300 to access tool-engaging elements of the assembly 10.More preferably, a tool inserted through the slots 308 can be navigated within the interior volume of the assembly 10 to engage tool engagement elements of the assembly 10 and preferably extend through the openings 208 of the support shell 200. In preferred embodiments, the slot(s) 308 of the protective cap 300 are preferably arcuate, each defining a slot length spanning an arc length β about the central cap axis Z--Z, such as shown in FIG. Fig. 3B, which is preferably greater than the arc length θ defined between two adjacent openings 208 of the support shell 200. In a preferred configuration of the inner slots 308, each of the preferred slots 308 has a preferred slot length extending over an arc β of greater than 90 degrees with respect to the central cap axis Z--Z, preferably greater than 120 degrees, preferably in the range between greater than 120 degrees and 180 degrees, and more preferably in the range between 160-180 degrees.

[0025] The outer surface 301b of the tubular cap 300 is preferably designed to ensure and maintain complete engagement between the support shell 200 and the protective cap 300. In preferred embodiments, the cap 300 includes a peripheral or outer shelf 310, as shown in Fig. 2 formed along the outer surface 301b of the tubular member. In the preferred assembly 10, the cap 300 is inserted into the support tray 200 until the outer shelf 310 abuts the open receiving end 204 of the support tray 200 to prevent further advancement and preferably position the first end 302 of the cap 300 at the preferred fixed distance from the openings 208 in the end cap 202 of the support tray 200. Accordingly, the cap 300 is preferably configured to position the inner baffle 306 with respect to the first end 302 and the end cap 202 of the support tray 200 to define the preferred internal volume of the assembly 10 to house the operating components of the sprinkler 100 and protect them from accidental impact and damage.The tray 310 preferably divides the protective cap 300 into an insertion end portion 300a located within the support shell 200 and an outer shield end portion 300b extending beneath the support shell 200 near the receiving end 204 of the shell. The shield end portion 300b, alone or in combination with the inner baffle 306, shields and protects the sprinkler 100 and the interior surfaces of the support shell 200 from accidental impacts or external elements such as paint splashes. The shield end portion 300b at least partially circumscribes the central cap axis Z--Z and, in some embodiments, preferably completely circumscribes the central axis Z--Z, as shown. The insertion end portion 300a preferably extends into the support shell sufficiently to circumscribe the fluid deflecting element 122 and at least a portion of the frame arms 110a, 110b.

[0026] To facilitate handling of the cap 300, the inner baffle 306 preferably includes an outer grip portion 305 extending axially through the shield end portion 300b. With particular reference to Fig. 3A, in preferred embodiments of the cap 300, the handle portion 305 extends axially below, above, or outside the shield end portion 300b. In such preferred embodiments, where the cap 300 defines an overall length L1, the first and second ends 302, 304 of the cap 300 define a wall length L2 therebetween. Preferably, the wall length L2 is at least 50% of the overall cap length L1, more preferably 75% or more of the overall cap length, to define a preferred cap length to wall length ratio (L1:L2) of 1.3:1. The handle portion 305 facilitates handling of the cap 300 in engagement with the support shell 200. Furthermore, in preferred embodiments, the cap 300 can be removed from the support shell 200, and if a sufficient portion of the handle 305 is exposed outside the cap wall, the cap 300 can be removed from the support shell 200 without the need for a removal tool as described herein.

[0027] The outer surface 301b of the protective cap 300 at the insertion end portion 300a also preferably engages the inner surface of the support tray 200 to maintain engagement between the support tray 200 and the protective cap 300 during storage, shipping, handling, installation of the sprinkler 100, and while waiting for the sprinkler to be put into operation. Preferred embodiments of the protective cap 300 include one or more projections 312 that engage the preferably corrugated wall of the support tray 200. In a preferred embodiment, a plurality of projections 312 are helically arranged along the outer surface 301b of the insertion end portion 300a to engage the corrugated inner surface of the support tray 200.

[0028] Preferred embodiments of the protective cap 300 offer a simplified construction compared to some prior art sprinkler covers or caps. With reference to Fig. 2 and Fig. 3A-3D, preferred embodiments of the cap are a unitary construction formed from a plastic material. A preferred embodiment of the tubular protective cap 300 is constructed such that the insertion end portion 300a consists of a single wall circumscribed at least partially about the central axis Z--Z, which forms the preferred inner surface 301a and outer surface 301b of the protective cap 300. The single-wall construction of the insertion end preferably facilitates its insertion and removal from the protected sprinkler assembly. In a preferred aspect, the single wall of the insertion end portion 300a of the protective cap narrowly tapers in an axial direction away from the shield end portion 300b. Alternatively or additionally, the insertion end portion 300a includes a plurality of cutouts or notches 313, preferably extending axially from the insertion end portion 300a of the cap 300 toward the shield end portion 300b.

[0029] In preferred embodiments with reference to Fig. 3B, the inner baffle 306 includes a central disc 314 and a pair of connectors 316 diametrically opposed around the central disc 314 for connecting the central disc 314 to the inner surface 301a of the protective cap wall, with slots 308 formed around the central disc 314 and extending between the connectors 316. In a preferred configuration of the slots 308, the plurality of slots 308 includes a pair of arcuate slots opposed about the central axis Z--Z and each having a slot length extending or spanning an arc β of greater than 90 degrees, preferably greater than 120 degrees, preferably in the range between greater than 120 degrees and 180 degrees, and more preferably between 160-180 degrees.

[0030] The protective cap 300 facilitates the installation of the sprinkler assembly 100 by remaining in place to protect the operating components of the sprinkler assembly 100 while allowing access to the associated tools to connect or disconnect the sprinkler assembly to the fluid supply pipe and to remove the cap 300 to put the sprinkler assembly 100 into operation. Fig. , a tool 400 is shown being inserted into the protected assembly 10 through the internal slots 308 of the protective cap 300 along the preferred defined tool path to access the tool engagement portions 124, 130 of the sprinkler 100. The inserted tool 400 extends into the preferred internal volume between the sprinkler 100 and the protective cap 300 to access or engage the tool engagement portions 124, 130, and preferably extends through the end cap 202 of the support shell 200. With reference to Fig. 2, the frame 102 includes a tool engagement portion 124 disposed or formed around the frame body between the body 104 and the frame arms 110a, 110b. The tool engagement portion 124 includes two or more flat surfaces for engagement with a tool, such as a sprinkler wrench. Preferably, the tool engagement portion 124 includes a driver element 130 disposed around the sprinkler body 104 and the flats of the tool engagement portion 124 for engagement with the sprinkler wrench or other tool to connect or disconnect the sprinkler 100 to a fluid supply pipe.

[0031] The driver element 130 preferably includes a disk element 132 having a central collar or opening 134 with internal flats for surface engagement with the flat surfaces of the sprinkler frame body 104. The driver element 130 further includes a plurality of spaced-apart ribs 136 extending radially from the central collar 134 to define tool engagement slots 138 therebetween. A suitable tool, such as a sprinkler wrench, can engage the slots 138 of the driver element 130 to apply torque to the sprinkler 100 to connect or disconnect the sprinkler 100 to a fluid supply pipe.Axially extending projections or nubs 140 of the driver element are received in corresponding axially aligned receiving openings 210 of the support shell 200 to lock the support shell 200 to the driver element 130 and to align the tool engagement slots 138 of the driver element 130 with the openings 208 of the end cap 202 of the support shell 200. Accordingly, rotation of the driver element 130 with a suitable tool engaging the tool engagement slots 138 of the driver element 130 rotates the support shell 200 and the engaging protective cap 300.

[0032] The preferred designs of the protective cap 300 and its engagement with the support shell facilitate the insertion and handling of tools into the protected sprinkler assembly 10. Unlike known sprinkler protective caps, the preferred cap 300 and its inserted end 302 are axially spaced from the openings 208 of the end cap 202 of the support shell 200, thereby avoiding alignment and interference problems between the components when inserting installation tools into the assembly 10. Furthermore, the preferred internal slot configurations 308 of the protective cap provide flexibility in rotating tools within the protected assembly 10 to facilitate either sprinkler installation or removal of the protective cap 300.In the preferred embodiments of the protective cap 300 with the preferred arcuate slots 308 and arc lengths as previously described, each individual slot 308 preferably axially intersects and / or aligns with more than one adjacent tool engagement slot 138 of the driver element 130 and / or more than one opening 208 in the support shell 200. Accordingly, each individual slot 308 preferably overlaps and / or is axially aligned with at least two adjacent tool engagement slots 138 or fractions thereof of the driver element 130 and / or at least two openings 208 or fractions thereof in the support shell 200. In other preferred embodiments, each individual slot 308 preferably overlaps and / or is axially aligned with more than two adjacent tool engagement slots 138 or fractions thereof of the driver element 130 and / or more than two openings 208 or fractions thereof in the support shell 200.The preferred axial overlap and / or alignment of slots 308 and openings 138, 208 may provide additional flexibility to navigate the tool 400.

[0033] With reference to Fig. 2, a preferred embodiment of the tool 400 is shown in the form of a sprinkler wrench. The tool has a first end 402 forming a base 404 and a group of spaced-apart extension members 406 extending axially from the base 404 about the central axis and forming the opposite second end 408. The base 404 of the tool 400, and alternative embodiments thereof, may be configured to receive a handle (not shown) for applying a force to the tool. Preferably, the tool 400 includes a pair of extension members 406 opposed around the base 404. In use, the tool 400 is inserted through the shield end portion 300b of the protective cap 300 such that each extension member 406 extends through one of the protective cap slots 308 and along the preferred tool path.Additionally, each extension member 406 defines a width that is preferably less than the slot length of the shroud slots 308 to allow rotation of the tool 400 relative to the shroud 300. The extension members 406 are preferably curved about coaxially aligned central axes with the shroud 300. Where the shroud slots 308 are defined by a first arc length, the width of each extension member 406 defines a preferred second arc length that is less than the first arc length. In a particularly preferred embodiment, the second arc length defined by the extension members 406 is at least 60% of the first arc length of the shroud slots 308. Preferred embodiments of the tool 400 include one or more projections 410 that project axially from the end of each extension member 406.The projection 410 is preferably sized and configured to engage the tool engagement slots 138 of the previously described preferred driver element 130 to rotate the protected assembly 10 during installation or uncoupling of the assembly 10 from a pipe fitting. In preferred embodiments, two projections 410 of each extension element 406 are preferably configured and spaced to respectively engage two angularly adjacent, spaced-apart tool engagement slots 138 of the driver element 130, as shown in FIGS. Fig. . Furthermore, the two projections 410 of each extension member 406 are preferably configured and spaced to respectively engage two angularly adjacent, spaced-apart openings 208 of the support shell 200. By configuring the shroud slots 308 with the preferred arc lengths, the tool 400 can be adjusted, including rotationally adjusted, within the shroud 300 to properly position and engage the driver member 130 without unnecessarily rotating the shroud 300 itself.

[0034] Alternatively or additionally, the tool 400 and its extension elements 406 may be configured with projections for engagement with one of the inner baffles 306, the tool engagement portion 124, 130 of the sprinkler 100, or the end cap 202 of the support shell 200. In the Fig. An alternative embodiment of the tool 400a is shown which provides surface engagement with the protective cap 300 to remove the cap from the assembly 10. The tool 400a includes laterally extending projections 412 extending to either side of the extension members 406 to form a preferred engagement notch 414 therebetween. The laterally extending projections 412 may have any geometry, provided that they can form an adjacent edge to the extension members 406 to form a notch 414 for engagement with the inner baffle 306 of the protective cap 300. Referring to the Fig. 3B and Fig. 5C, with the extension members 406 extending through the slots 308, the tool can be rotated about the central sprinkler axis to bring the engagement notch 414 into contact with the inner baffle 306 of the protective cap 300 and its fitting 316. With the laterally extending projections 412 located above the protective cap baffle 306, the tool 400a can be pulled axially alone or in combination with a rotating motion to remove the protective cap 300 from the protective assembly 10. In the preferred embodiments of the tool 400a with laterally extending projections 412 on either side of the extension members 406, the tool 400 can be rotated clockwise or counterclockwise, i.e., bidirectionally, to engage the baffle 306 within the protective cap 300.

[0035] The Fig. The embodiments of the tool 400 shown in Figures 2, 4A-4B, and 5A-5C can be used to remove the protective cap 300 and / or to connect the protected sprinkler assembly 10 to a fluid supply pipe. Fig. 6A-6C illustrates another alternative embodiment of the tool 400b configured exclusively for removing the protective cap 300. The tool 400b includes only laterally extending projections 412 to form the preferred notch 414 for engagement with the baffle plate 306 of the preferred protective cap 300. Fig. The embodiment of the tool 400b shown in Figure 6C defines a preferred height such that its engagement notch 414 engages the deflector plate 306, but not the end cap 202 of the support shell 200. Accordingly, the end 408 of the tool 400b is located between the end cap 202 of the support shell 200 and the deflector plate 306 of the protective cap 300 when the extension elements 406 are inserted into the protected assembly 10.

[0036] The schematic representation in Fig. 7A shows the protected sprinkler 10 installed in a through hole of a ceiling C, with the sprinkler frame 102 connected to a connector SP for a fluid supply pipe and the protective cap 300 extending below the ceiling C. As described herein, the sprinkler 100 can be connected to a fluid supply pipe using an installation tool 400, with the protective cap 300 remaining in place. Furthermore, the protective cap 300 can remain in place while the sprinkler 100 awaits commissioning. In the exploded view of Fig.7B shows the connected sprinkler 100 in a concealed configuration. Once the protective cap 300 has been removed, e.g., using tool 400a, 400b, the fluid deflector 122 is held in a retracted position by a thermally responsive cover plate assembly 500 secured to the support tray 200. The cover plate assembly 500 preferably includes a retaining ring 502 having a flange for attachment to the ceiling C. A cover plate 504 is connected to the retaining ring 502 via a thermally responsive brazed joint. Upon sufficient heat, the cover plate 504 falls away from the sprinkler, thereby removing support from the fluid deflector 122 and allowing it to fall into its fully extended operating position.

[0037] While the present invention has been disclosed with reference to specific embodiments, numerous modifications, variations, and changes to the described embodiments are possible without departing from the spirit and scope of the present invention as defined in the appended claims. Accordingly, it is intended that the present invention not be limited to the described embodiments, but that it have the full scope defined by the language of the following claims and their equivalents. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 8,794,340 [0003, 0020] US 2017 / 0296852 [0003, 0020] US 9,463,343 [0005, 0006, 0007] US 9,630,039 [0005, 0007]

Claims

[1] Protected sprinkler assembly (10) comprising: a fire protection sprinkler (100) having a frame (102) and a fluid deflector (122) connected to the frame, the frame having a body (104) defining an inlet (106), an outlet (108) and an internal passage extending along a sprinkler axis from the inlet to the outlet; a support shell (200) having an end cap (202) with a central opening (206) disposed around the body and a plurality of openings (208) disposed radially around the central opening, the support shell having an open receiving end (204) opposite the end cap to define a shell chamber (203) centered about a central shell axis, the plurality of openings being angularly spaced about the shell axis to define a first arc length about the shell axis between two angularly adjacent spaced openings; and a protective cap (300) including a tubular member having a first end (302), an opposite second end (304), and an inner baffle (306) retained within the tubular member and spaced from the first end to define a cap chamber (303) centered about a cap axis, the protective cap engaging the support shell to define an interior volume of the sprinkler assembly between the end cap and the inner baffle, the inner baffle defining a plurality of slots (308) in fluid communication with the interior volume to define a tool path therethrough, each slot in the plurality of slots defining a slot length extending a second arc length about the cap axis that is greater than the first arc length between the two angularly adjacent openings of the plurality of openings of the support shell. [2] The assembly of claim 1, wherein the protective cap engages the support shell to position the first end of the tubular member within the support shell at a fixed distance from the plurality of openings of the end cap. [3] The assembly of claim 1, wherein the tubular member has an outer shelf (310) between the first end and the second end that abuts the receiving end of the support shell. [4] The assembly of claim 3, wherein the tubular member defines an insertion end portion (300a) comprising the first end and an opposite shielding end portion (300b) of the cap comprising the second end, the insertion end portion and the shielding end portion being separated from each other by the outer shelf, the insertion end portion being defined by a single wall extending at least partially around the cap axis. [5] The assembly of claim 4, wherein the shielding end portion at least partially circumscribes the cap axis. [6] The assembly of claim 5, wherein the inner baffle is located between the first end and the second end of the tubular member. [7] The assembly of claim 4, wherein an outer surface of the single wall of the insertion end portion of the protective cap engages an inner surface of the support shell, the support shell having a helical internal thread and the outer surface of the single wall of the insertion end portion having a plurality of projections (312) helically arranged to engage the helical internal thread, the single wall of the insertion end portion tapering in an axial direction away from the shield end portion, and the single wall of the insertion end portion having a plurality of notches (313) extending axially from the insertion end portion to the shield end portion. [8] The assembly of claim 4, wherein the plurality of slots comprises a pair of slots and wherein the second arc length extends 90 degrees with respect to the cap axis. [9] The assembly of claim 8, wherein the inner baffle comprises a central disc (314) and a pair of connectors (316) diametrically opposed around the central disc for connecting the central disc to an inner surface (301a) of the single wall, the slots extending between the connectors. [10] The assembly of claim 1, wherein the inner baffle includes a central disc (314) and a pair of connectors (316) diametrically opposed around the central disc for connecting the central disc to an inner surface (301a) of the tubular member, the plurality of slots extending between the pair of connectors. [11] The assembly of claim 1, wherein the inner baffle includes a central handle (305) extending axially beyond the second end to define an overall length of the protective cap, the tubular member having an axial length of at least 50% of the overall length of the protective cap. [12] The assembly of claim 1, wherein the frame comprises a pair of frame arms (110a, 110b) and a tool engagement portion (124, 130) between the body and the frame arms; wherein the fluid deflector is in sliding pin engagement with the pair of frame arms, the fluid deflector being coaxially aligned along the sprinkler axis; wherein the fire sprinkler is an automatic sprinkler with a seal assembly (112) disposed in the outlet; and wherein a thermally responsive actuator (114) is disposed between the outlet and the deflector to retain the seal assembly in the outlet. [13] The assembly of claim 12, further comprising an apex (116) centered along the sprinkler axis and axially spaced from the outlet a first distance to receive the thermally responsive trigger assembly, the pair of frame arms being diametrically opposed around the outlet and the thermally responsive trigger assembly being seated between the frame arms, each frame arm having a terminal end (118a, 118b) axially spaced from the outlet a second distance equal to or greater than the first distance, each terminal end being formed as a laterally outwardly extending cantilever having a through bore formed therein, the frame arms also comprising a pair of extension members (117a, 117b) extending laterally inwardly to respectively interconnect the apex and the frame arms and to form a frame window therebetween. [14] The assembly of claim 13, wherein the plurality of openings of the support shell extend from the end cap into a wall of the support shell. [15] The assembly of claim 13, further comprising a tool (400; 400a) engaging the protective cap, the tool having a base (404) defining a first end (402) of the tool and a pair of spaced-apart extension members extending axially from the base, the tool being inserted through the second end of the tubular member such that each extension member extends through a slot of the plurality of slots, each extension member having a projection (410) for engagement with at least one of the inner baffle, the tool engaging portion of the sprinkler frame, or the end cap of the support tray. [16] The assembly of claim 15, wherein the tool engagement portion comprises a disk member (132) having a central collar (134) with internal flats for surface engagement with the body of the frame, the disk member including a plurality of spaced ribs (136) defining tool engagement slots therebetween that are axially aligned with the openings of the support shell, each slot in the plurality of slots of the cap axially overlapping more than one tool engagement slot. [17] The assembly of claim 16, wherein the tool includes a plurality of projections (412) extending laterally around the extension members to form a notch (414) therebetween, wherein rotation of the tool with respect to the tubular member engages the tool with the inner baffle of the tubular member to axially remove the protective cap from the support shell. [18] A protective cap for a fire protection sprinkler assembly comprising a sprinkler frame, a fluid deflector, and a support shell having an end cap with a central opening centered about a shell axis and disposed around the sprinkler frame, the end cap having a plurality of openings angularly spaced about the central opening to define an arc length about the shell axis between two angularly adjacent spaced openings, the protective cap comprising: a tubular member for engagement with the support shell, the tubular member having an inner surface, an outer surface, a first end and a second end spaced apart along a cap axis; an inner baffle formed in the tubular member, the inner baffle being axially spaced from the first end to define a cap chamber having the inner surface and being centered about the cap axis; and a plurality of slots formed between the inner baffle and the inner surface of the tubular member, each slot in the plurality of slots being in fluid communication with the cap chamber to define a tool path in fluid communication with an interior volume defined between the tubular member and the support shell, each slot in the plurality of slots having a slot length extending an arc length with respect to the shell axis that is greater than the arc length between the two angularly adjacent spaced-apart openings of the end cap. [19] The protective cap of claim 18, wherein the support shell includes the end cap having the central opening disposed around the frame and the plurality of openings around the central opening and an open receiving end opposite the end cap, wherein when the tubular member is inserted into the open receiving end of the support shell, the outer surface of the tubular member engages the support shell to locate the first end of the tubular member within the support shell at a fixed distance from the openings of the end cap of the support shell. [20] A protective cap according to claim 18, wherein the tubular member comprises an insertion end portion and a shielding end portion, the insertion end portion including the first end and being defined by a single wall extending at least partially around the cap axis. [21] A protective cap according to claim 20, wherein the single wall of the insertion end portion has a plurality of notches extending axially from the insertion end portion to the shielding end portion. [22] A protective cap according to claim 20, wherein the insertion end portion has a plurality of external projections for engagement with a helical groove formed on an inner surface of the support shell. [23] A protective cap according to claim 20, wherein the shielding end portion is arranged partially around the cap axis. [24] A protective cap according to claim 18, wherein the outer surface of the tubular member defines an outer shelf for engagement with the support shell. [25] The protective cap of claim 18, wherein the plurality of slots comprises a pair of slots opposed around the baffle, each slot in the pair of slots defining an arc length extending 90 degrees with respect to the cap axis. [26] A protective cap according to claim 18, wherein the inner baffle plate comprises a central disc and a pair of connectors diametrically opposed around the central disc for connecting the central disc to the inner surface of the tubular member, the slots extending between the connectors. [27] A protective cap according to claim 18, wherein the inner baffle has a central handle extending axially beyond the second end to define an overall length of the protective cap, the tubular member having an axial length of at least 50% of the overall length of the protective cap. [28] Use of a protective cap according to claim 18 for protecting a sprinkler assembly comprising a frame, a deflector and a support shell having an end cap with a central opening centered about a shell axis and disposed about the sprinkler frame, the end cap having a plurality of openings angularly spaced about the central opening to define an arc length about the shell axis between two angularly adjacent, spaced openings. [29] Use according to claim 28, wherein the use comprises: Engaging the tubular member with the support shell to define an internal volume between the end cap of the support shell and the inner baffle formed in the tubular member, the inner surface of the tubular member circumscribing the sprinkler assembly; and Defining the tool path with the plurality of slots formed around the inner baffle and in fluid communication with the interior volume for accessing a tool engaging portion of the sprinkler assembly during installation of the sprinkler assembly, wherein each slot in the plurality of slots has a slot length extending an arc length with respect to a central axis of the tubular member that is greater than the arc length between the two angularly adjacent spaced-apart openings of the plurality of openings of the support shell. [30] Use according to claim 29, wherein engaging comprises locating the first end of the tubular member in the support shell at a fixed distance from the plurality of openings formed in the end cap of the support shell. [31] Use according to claim 29, further comprising inserting a tool along the tool path through the plurality of slots defined by a pair of arcuate slots formed between the inner baffle and the inner surface of the tubular member; and accessing the tool engaging portion of the sprinkler with the tool extending through the interior volume. [32] Use according to claim 29, wherein the engagement comprises abutting an outer shelf formed around the tubular member with a receiving end of the support shell. [33] Use according to claim 29, wherein the engagement comprises the rotational engagement of projections formed on an outer surface of the tubular member into a helical groove formed in the interior of the support shell. [34] Use according to claim 29, further comprising axially withdrawing the tubular member from a receiving end of the support shell with a tool along the tool path. [35] Use according to claim 29, further comprising: Inserting a tool through the plurality of slots along the tool path; Rotating the tool relative to the tubular member; and Axial withdrawal of the tubular element from the support shell.

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