US 2011/0088342 A1 · Firestopping bushing

Abstract

A relatively inexpensive bushing easily installed extending through walls, particularly, gypsum board membrane walls for providing firestopping around a limited number of linear penetrating members such as cables or wires. This grommet construction includes first and second half sections for facilitating attachment around cables more easily. A split internal seal preferably of resilient foam material is positioned within a split mechanical shell which facilitates placing of the bushing around penetrating members prior to placement thereof through walls or after positioned thereof penetrating through a panel such as wallboard. A split mechanical shell with a two-piece foam insert retained within a bore extending therethrough can be formed as two separable half cylindrical shells. Barbs are included on the outer portion of the shell to facilitate mounting thereof. The foam firestopping seal portion can be intumescent.

A firestopping bushing positionable within an aperture defined in a wallboard panel for firestopping around one or more penetrating members such as a cables, wires or plugs extending therethrough comprising:

A. a first half section being generally half tubularly shaped to define a first half bore means extending longitudinally therealong, said first half section including:
(1) a first interior surface being generally arcuate and concave to define said first half bore means extending longitudinally therealong;
(2) a first exterior surface being generally arcuate and convex positioned spatially disposed from said first interior surface and positioned facing radially outwardly therefrom;
(3) a first abutment edge extending longitudinally along said first interior surface and said first exterior surface and being positioned extending therebetween, said first abutment edge including;
a. a first abutment edge first section extending longitudinally along said first interior surface and said first exterior surface and being positioned extending therebetween;
b. a first abutment edge second section extending longitudinally along said first interior surface and said first exterior surface and being positioned extending therebetween at a position spatially disposed from said first abutment edge first section with said first half bore means positioned therebetween;
(4) a first head end defining a first head opening means therewithin in fluid flow communication with said first half bore means;
(5) a first insertion end defining a first insertion opening means therein in fluid flow communication with respect to said first half bore means and with respect to said first head opening means;
6) a first head flange section extending radially outwardly from said first exterior surface at said first head end thereof;
(7) at least one first barb extending outwardly from said first exterior surface to facilitate engagement thereof with respect to the wallboard panel responsive to positioning of said first half section within the wallboard panel aperture;
B. a first firestopping sealing section of flexible resilient firestopping material positionable within said first half bore means of said first half section which comprises:
(1) a first sealing section arcuate surface positionable in abutment with respect to said first interior surface to facilitate retaining of said first firestopping seal section within said first half bore means;
(2) a first sealing section planar surface oppositely positioned from said first sealing section arcuate surface and positionable in direct flexibly resilient abutment with penetrating members positioned extending through the fire stopping bushing to facilitate firestopping sealing therearound;
C. a second half section being generally half tubularly shaped to define a second half bore means extending longitudinally therealong, said second half section and said first half section being attachable in abutment with respect to one another to position said first half bore means and said second half bore means adjacently together to define a central bore means extending axially and longitudinally through the firestopping bushing, said second half section including:
(1) a second interior surface being generally arcuate and concave to define said second half bore means extending longitudinally therealong;
(2) a second exterior surface being generally arcuate and convex positioned spatially disposed from said second interior surface and positioned facing radially outwardly therefrom;
(3) a second abutment edge extending longitudinally along said second interior surface and said second exterior surface and being positioned extending therebetween, said second abutment edge including;
a. a second abutment edge first section extending longitudinally along said second interior surface and said second exterior surface and being positioned extending therebetween, said second abutment edge first section of said second half section being positionable in abutment and engagement with said first abutment edge second section of said first half section to facilitate abutting engagement therebetween;
b. a second abutment edge second section extending longitudinally along said second interior surface and said second exterior surface and being positioned extending therebetween at a position spatially disposed from said second abutment edge first section with said second half bore means positioned therebetween, said second abutment edge second section of said second half section being positionable in abutment and engagement with said first abutment edge first section of said first half section to facilitate abutting engagement therebetween;
(4) a second head end defining a second head opening means therewithin in fluid flow communication with said second half bore means, said second head opening means and said first head opening means positioned adjacently to define together a main head opening means responsive to abutting engagement between said first half section and said second half section;
(5) a second insertion end defining a second insertion opening means therein in fluid flow communication with respect to said second half bore means and with respect to said second head opening means, said second insertion opening means and said first insertion opening means positioned adjacently to define a main insertion opening means responsive to abutting engagement between said first half section and said second half section;
(6) a second head flange section extending radially outwardly from said second exterior surface at said second head end, said second head flange section being positioned adjacent said first head flange section to define a head flange responsive to abutting engagement between said first half section and said second half section;
(7) at least one second barb extending outwardly from said second exterior surface to facilitate engagement thereof with respect to the wallboard panel responsive to positioning of said second half section within the wallboard panel aperture;
D. a second firestopping sealing section of flexible resilient firestopping material positionable within said second half bore means of said second half section which comprises:
(1) a second sealing section arcuate surface positionable in abutment with respect to said second interior surface to facilitate retaining of said second firestopping sealing section within said second half bore means;
(2) a second sealing section planar surface oppositely positioned from said second seal section arcuate surface and positionable in direct flexibly resilient abutment with said first seal section planar surface to define a sealing seam therebetween for receiving penetrating members positioned extending therethrough to facilitate firestopping sealing therearound.

23 more elements

Firestopping bushing

Life of this patent

Firestopping bushing

Life of this patent

Abstract

Claims21