RESIDENTIAL CONCEALED SPRINKLER

Abstract

An automatic fire protection sprinkler includes a sprinkler body having a passage with an inlet end and a discharge opening. A pair of sprinkler arms extend from the sprinkler body. The pair of sprinkler arms each include a radially inwardly extending leg including a threaded bore for receiving a compression screw. The pair of sprinkler arms each include a radially outwardly extending leg each defining an aperture therein. An outlet closure assembly includes a closure element that selectively blocks the discharge opening of the sprinkler body and a trigger assembly including a yoke that engages the compression screws and a glass bulb that extends between the yoke and the closure element. A deflector is coupled to the sprinkler arms by a pair of support pins that are received in the apertures in the radially outwardly extending legs of the at least two sprinkler arms.

Claims

1. An automatic fire protection sprinkler comprising: a sprinkler body having a passage with an inlet end and a discharge opening; a pair of sprinkler arms extending from said sprinkler body on opposite sides of the discharge opening, the pair of sprinkler arms each including a radially inwardly extending leg extending toward one another and spaced from one another, said radially inwardly extending legs each including a threaded bore for receiving a compression screw, said pair of sprinkler arms each including a radially outwardly extending leg each defining an aperture therein; an outlet closure assembly includes a closure element that selectively blocks the discharge opening of the sprinkler body and a trigger assembly including a yoke that engages the compression screws and a glass bulb that extends between the yoke and the closure element; and a deflector coupled to said sprinkler arms by a pair of support pins that are received in the apertures in the radially outwardly extending legs of the at least two sprinkler arms.

2. The automatic fire protection sprinkler according to claim 1, wherein the yoke includes a crossbar having a U-shaped midsection with a first recess in a first side and a pair of ends each including a second recess therein on a second side opposite the first side, wherein the first recess engages the glass bulb and the second recess in each of the pair of ends engage the pair of compression screws.

3. The automatic fire protection sprinkler according to claim 2, wherein the yoke further includes an ejection structure extending from a side of the cross bar.

4-5. (canceled)

Description

DRAWINGS

[0012] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0013] FIG. 1 is a cross-sectional view of the residential concealed sprinkler according to the principles of the present disclosure;

[0014] FIG. 2 is a perspective view of a deflector assembly according to the principles of the present disclosure;

[0015] FIG. 3 is a top plan view of the deflector assembly shown in FIG. 2;

[0016] FIG. 4 is a side plan view of the deflector assembly shown in FIG. 2;

[0017] FIG. 5 is a perspective view of a deflector button according to the principles of the present disclosure;

[0018] FIG. 6 is a side plan view of the deflector button shown in FIG. 5;

[0019] FIG. 7 is a cross-sectional view of the deflector button shown in FIG. 5;

[0020] FIG. 8 is a perspective view of a yoke of a trigger assembly according to the principles of present disclosure;

[0021] FIG. 9 is a side plan view of the yoke shown in FIG. 8;

[0022] FIG. 10 is an end plan view of the yoke shown in FIG. 8; and

[0023] FIG. 11 is a plan view of a stamped blank used to make the yoke according to the principles of the present disclosure.

[0024] Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.

DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0026] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0027] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.

[0028] When an element or layer is referred to as being “on,” “engaged to,” “connected to,” or “coupled to” another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly engaged to,” “directly connected to,” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.

[0029] Spatially relative terms, such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0030] With reference to FIG. 1, a residential concealed sprinkler 10 according to the principles of the present disclosure will not be described. The residential concealed sprinkler 10 includes a sprinkler body 12 includes a fluid passage 14 defining an inlet opening 16 and a discharge opening 18. The body 12 includes an upper section having external threads 20. The body 12 further includes a pair of frame arms 22 spaced from one another on opposite sides of the discharge opening 18.

[0031] The pair of frame arms 22 each include a radially inwardly extending leg portion 24 and a radially outwardly extending leg portion 26. Each of the radially inwardly extending leg portions 24 includes a threaded bore 28 that receives a compression screw 30. The compression screws 30 each engage a yoke 32 that extends between the compression screws 30. The yoke 32 engages a glass bulb 34 at a distal end and a proximal end of the glass bulb 34 engages a seal assembly 36. The seal assembly 36 can include an annular spring washer 38 and pip cap assembly 40.

[0032] As shown in FIG. 8, the yoke 32 includes a bent crossbar 42 having a U-shaped mid-section 44 with a center recess 46 for receiving the distal end of the glass bulb 34. The ends 48 of the crossbar 42 extend from the U-shaped mid-section and each include a recess 50 on an opposite side of the crossbar 42 from the recess 46. The yoke 32 can further include an upwardly extending ejection structure 52 disposed on one side of the crossbar 42. The ejection structure 52 provides a pivot point for causing the yoke 32 to pivot and eject outwardly from the sprinkler when the glass bulb 34 shatters due to the heat of a fire. The ejection structure 52 can be in the form of a continuous structure extending from opposite ends 48 of the crossbar 42.

[0033] The yoke is made from a flat blank 100 that is stamped from sheet metal, as shown in FIG. 11. The stamped blank 100 can be generally “D”-shaped and includes a straight section 102 and an arc shaped extension 104 extending from opposite ends of the straight section 102. The arc shaped extension 104 can be bent so as to be generally perpendicular to the straight section 102, as shown by the bent extension portion 52 in FIGS. 8 and 10. The straight section 102 can be stamped to include the recess 50 at each end facing in a direction away from the bent arc shaped extension 52. The additional central recess 46 can be formed in a center of the straight section 102 facing in a direction toward the bent arc shaped extension 52. The midsection of the straight section 102 is bent in a U-shape 44 so that the base of the U extends away from the bent arc shaped extension 52.

[0034] A deflector assembly 60 is supported to the pair of radially outwardly extending legs 26 of the sprinkler body 12 by a pair of support pins 62 that are received in apertures 64. The support pins 62 are engaged with apertures 66 provided in a deflector plate 68. The deflector plate 68 can be oval shaped and include a plurality of slots 70 extending inward from an outer periphery of the plate 68 to define a plurality of tines 72 so as to provide a desired spray pattern. The size and shape of the slots 70 can be selected to provide a desired flow pattern in order to distribute water being discharged from the discharge opening 18 so as to meet the necessary distribution pattern for suppressing a fire in a desired coverage area. A deflector button 74 can be secured to a center of the deflector plate 68. The deflector button 74 can be sized and shaped to distribute the flow of water through the discharge opening 18 radially outward across the surface of the deflector plate 68. The deflector button 74 can have a cone shaped face 76 and a cylindrical base 78 that is staked to the deflector plate 68.

[0035] A can-shaped housing 80 can be mounted to the sprinkler body 12. As is well known in the art, a cover assembly (not shown) can be mounted to the can-shaped housing 80 for concealing the sprinkler 10 in an installed condition.

[0036] The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.