Abstract:
A ground supported and upwardly extensible firewall curtain, such as for use in containing fires. A plurality of ground anchored and elongated housing are arranged in end-to-end interconnected fashion, such as in an advance position of an approaching fire. Each housing assembly includes an interiorly stored and upwardly extended curtain constructed of a fire resistant material. The curtains are likewise interconnected in end-to-end and inter-structurally supported fashion and so that a continuous fire wall is created to prevent or retard the advance of the fire in a given direction, such as toward residential or other populated areas.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This Application claims the benefit of U.S. Provisional Application 61/244,581 filed on Sep. 22, 2009. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention teaches a ground supported and upwardly extensible firewall curtain, such as for use in containing forest fires and the like. A plurality of ground anchored and elongated housing are arranged in end-to-end interconnected fashion, such as in an advance position of an approaching fire. Each housing assembly includes an interiorly stored and upwardly extended curtain constructed of a fire resistant material. The curtains are likewise interconnected in end-to-end fashion and so that the continuous fire wall is created to prevent or retard the advance of the fire in a given direction, such as toward residential or other populated areas. 
       BACKGROUND OF THE INVENTION 
       [0003]    Fire containment technologies and associated tactics are known in the art, in particular instances intended to retard or prevent the spread of burning forest fires such as into residential areas which may reside within or adjacent to heavily wooded areas which are susceptible to fire. Conventional fire fighting practices include the dropping of chemical retardants from planes or helicopters. Additional known tactics include the clearing of areas of trees and other wooded brush in advance of a progressing fire, such as in order to create a fire break. Shortcomings of such known techniques include the requirement that they be implemented by such as professional or volunteer fire departments, this providing a residential homeowner or community no reasonable ability to implement any effective fire containment strategy for combating wildfires and the like. 
       SUMMARY OF THE INVENTION 
       [0004]    The present invention discloses a ground supported and upwardly extensible firewall curtain, such as for use in containing fires. A plurality of ground anchored and elongated housing are arranged in end-to-end interconnected fashion, such as in an advance position of an approaching fire. 
         [0005]    Each housing assembly further includes an interiorly stored and upwardly extended curtain constructed of a fire resistant material. A support structure, either pivotal or telescoping, is incorporated into the housing assembly and interfaces with supports integrated into the curtain construction in order to expand/elevate and lock into place the curtain. 
         [0006]    Ground supported stanchions extend from elevated locations of the curtain to provide further fixing support to the housing, such as in response to high winds or the like. The curtains are likewise interconnected in end-to-end and inter-structurally supported fashion and so that a continuous fire wall is created to prevent or retard the advance of the fire in a given direction, such as toward residential or other populated areas. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    Reference will now be made to the attached drawings, when read in combination with the following detailed description, wherein like reference numerals refer to like parts throughout the several views, and in which: 
           [0008]      FIG. 1  is a perspective view of a fire curtain and elongate ground supported housing according to a one embodiment and in a first retracted position; 
           [0009]      FIG. 2  is a succeeding illustration of the fire curtain of  FIG. 1  in a semi upwardly extended position and by which first and second elongated and side articulating supports are utilized to upwardly displace the curtain; 
           [0010]      FIG. 3  is an illustration of the fire curtain of  FIGS. 1 and 2  in a fully upwardly extended position in which the side articulating supports are generally vertically extending and including the additional features of an intermediate and width extending bar support, with additional reinforcement provided by rigid supports or tension cables extending from top locations of the curtain and supported by ground engaged spikes; 
           [0011]      FIG. 4  is a perspective view of a fire curtain and elongate ground supported housing according to another embodiment in a first retracted position; 
           [0012]      FIG. 5  is a succeeding illustration of the fire curtain of  FIG. 4  in a semi upwardly extended position and by which generally side positioned and combination telescoping/pivoting elongate cylinders are utilized to upwardly displace the curtain; 
           [0013]      FIG. 6  is an illustration of the fire curtain of  FIGS. 4 and 5  in a fully upwardly extended position and by which the side telescoping supports are generally vertically extending and again illustrating the feature of upstanding rigid supports or tension cables extending from top locations of the curtain and supported by ground engaged spikes; 
           [0014]      FIG. 7  is an illustration of any variant in which a fire retardant fluid can be emitted as a spray or misting pattern both forwardly/upwardly from locations associated with the elongated and ground supported housing; 
           [0015]      FIG. 8  is a successive illustration to that shown in  FIG. 7  and by which a hose bib associated with each edge location of a given housing connects to a succeeding housing in order to communicate fluid between each assembly; 
           [0016]      FIG. 9  is an overhead birds eye illustration of a perimeter extending application of the fire curtain about a residential subdivision; and 
           [0017]      FIG. 10  is an enlarged illustration of a subset extending section of the fire curtain shown in  FIG. 9 . 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0018]    Referring now to  FIG. 1 , with succeeding reference to  FIGS. 2 and 3 , a perspective view is generally shown at  10  of a fire curtain and elongate ground supported housing according to a non-limiting embodiment and in a first retracted position. The housing, as shown at  12 , exhibits an elongated and generally rectangular shaped three dimensional housing including elongated sides, interconnected ends and a depth defining base. 
         [0019]    A lid  14  is hingedly secured to a top extending side of the housing  12  and, as shown in  FIG. 1 , is pivoted open to reveal the curtain assembly in a retracted/stored condition within the open interior of the housing. The housing  12  and lid  14  are further constructed of a durable and flame/heat retardant material, such as including without limitation a metal or polymeric thermoset structure. 
         [0020]    Also shown are spikes  16  and  18  which extend through corner locations of the housing  12 , these being vertically apertured to permit passage of the spikes and in order to secure the housings upon a ground surface, such as arranged in an advanced direction of a path of a traveling fire. An arcuate shaped hose bib is also shown at  20  and, with further reference to the teachings of  FIGS. 7 and 8 , communicates with a water/spray dispensing architecture incorporated into the housing  12  (see further interior extending fluid line in phantom at  19  in  FIG. 1  in communication with both the hose bib  20 ) to provide for fluid interconnection between each of a plurality of end to end interconnected housings. 
         [0021]    In this fashion, either a water or a liquid flame retardant communicated with an initial hose bib provides a continuous spray or misting effect (see further such as which is distributed through apertures  21  and  23  defined at forward facing locations of the housing in fluid communication with the interior extending) through an interconnected network of housings. Although not shown in  FIG. 1 , an extending end of the interior conduit  19  communicates with an end aperture in the initial housing  12  and for receiving an inserting end of a hose bib extending from a second identically constructed housing  12 . 
         [0022]    As shown in the overhead environmental views of  FIGS. 9 and 10 , the present invention contemplates a plurality of individual housing assemblies engaged in end to end aligning fashion and which are generally represented by enclosed perimeter  100  and which can extend around a plurality of homes, see at  2 ,  4 ,  6 ,  8 , et seq. which are associated with such as a residential development or other population/targeted geographic center which it is desirous to shield from a path of an oncoming fire. Beyond the illustrations shown, it is understood that the arrangement and configuration of the fire curtain assemblies can be established according to any desired configuration or arrangement and which will serve the purpose of retarding or redirecting a path of fire away from populated areas. 
         [0023]    As further referenced in  FIGS. 2 and 3 , an extensible curtain  22  is provided and which is constructed of a flexible material having fire/heat retardant properties, such as further including a cloth, a polymer/plastic or composite. The flammability of fabric can be drastically reduced through the use of fire retardants. Many natural fibers, including cotton, can be topically treated with a chemical that reduces the fabric&#39;s flammability to the extent that it becomes nearly non-combustible. In one known application, and during a fire, the chemical reacts with the gases and tars generated naturally by the fabric, converting the gases and tars to a carbon char, thus drastically slowing the fabric&#39;s burning rate. 
         [0024]    Other types of polyester fabrics are also considered to be permanently fire retardant. This is because fire retardant properties are built directly into the molecular structure of the fibers. Fabrics manufactured utilizing Trevira™ and Avora™ polyester fibers are considered inherently or permanently fire retardant. Other synthetic fabrics may be considered durably fire retardant, fire retardant, or non-fire retardant. Beyond those described, durably fire retardant materials refer to such as polyesters which are chemically treated during the manufacturing process with a non-water soluble chemical. 
         [0025]    In other cases, synthetic fabrics may be topically treated with chemicals after the manufacturing process, in the same manner as natural fibers such as cotton. Among these, Aramid™ and Twaron™ are used in modern fabrics to withstand high temperatures in industry and fire-fighting. 
         [0026]    The above said, the fire retardant curtain  22  is provided according to a desired width (such as several feet or more and which is equivalent to the overall length of the housing), an upwardly extending length (such as up to 12′ in one non-limiting variant) and a thickness (such as in one non-limiting example of 0.020 mil or upwards). Both the semi-upwardly extended position of  FIG. 2  and the fully extended position of  FIG. 3  include an elevating mechanism of some type which, as illustrated, includes a pair of first and second elongated and side articulating supports which are utilized to upwardly displace the curtain. 
         [0027]    Each articulating support includes a pair of end to end hingedly connected arms, see at  24  &amp;  26  for first side extensible support and further at  28  &amp;  30  for second side extensible support. As shown, the individual pairs of arms  24 / 26  and  28 / 30  pivotally interconnect at a central location, with opposite extending ends of each lower pivoting arm  24  and  28  connecting to a corner location of the housing, whereas the extending ends of each of upper pivotally connected arms  26  and  30  engaging top corner (typically reinforced) locations of a top lengthwise extending member in turn supporting the curtain  22 , and such as further which may define opposite ends of a top and widthwise extending support bar  31 . The arms  24 - 30  are each likewise constructed of a fire/heat retardant and rigid material consistent with all of the components and associated fasteners employed in the present design. 
         [0028]    In this fashion, and as evidenced in  FIG. 3 , the upward pivoting extension of the articulating supports (see also arrows  32  and  34  in  FIG. 2 ) causes the intermediate and articulating hinged connections  36  and  38  associated with each pair of side extensible supports to unfold/expand outwardly to a fully vertically extended position ( FIG. 3 ), at which point the construction of the articulating hinged connections  36  and  38  being such that they can be locked or otherwise prevented from reverse folding, such utilizing known mechanical features, and until it is desired to unlock the articulating supporting hinged connections in order to downwardly retract the curtain  22 . 
         [0029]      FIG. 3  again is an illustration of the fire curtain of  FIGS. 1 and 2  in a fully upwardly extended position in which the side articulating supports are generally vertically extending and the curtain is fully deployed. At this point, an intermediate and width extending bar support  40 , this constructed in a similar nature as the articulating arms  24 - 30 , is separately installed in width extending fashion across the curtain  22  and seats within seating locations established in opposing fashion within the hinged connections  36  and  38 . The hinged connections can each exhibit a modified T shape connection and which, upon being fully upright extended, are maintained in the upright position by the presence of the center bar support  40 , which can also be designed to prevent premature retraction of any variation of side articulating supports which do not otherwise employ a locking feature. 
         [0030]    Additional upstanding reinforcing support is provided by a form of angular extending stanchion support terminating in such as a turf embedded stake, this including in one non-limiting variant rigid extending members such as shown by end to end connected pairs of rigid support poles  42  &amp;  44  as well as at  46  &amp;  48 , these extending from top supporting locations, e.g. see selected upper corner reinforced location  50  of the curtain  22 , and which are further supported at their angled ground location by turf engaging spikes  52  and  54 . As shown in  FIG. 3 , the extending members can be provided by the multiple end-to-end assembleable pole sections  42  &amp;  44  and  46  &amp;  48  or in an alternative variant by a stanchion support provided as a tensioned cable configuration which is substituted for the rigid interconnected poles, with tension being applied to both first and second cables and translated to the turf engaging stakes and in order to maintain the assembly in an upright position. 
         [0031]    Referring now to  FIG. 4 , a perspective view is generally shown at  56  of a fire curtain and elongate ground supported housing according to another embodiment in a first retracted position. The features of the housing  12 , lid, ground engaging spikes  16  and  18 , hose bib  20 , apertures  21  and  23 , and curtain  22  all remain from the first described embodiment, such that a repetitive description is unnecessary. The variant of  FIGS. 4-6  differs from that illustrated in  FIGS. 1-3  in that the articulating pairs of arms are substituted by telescoping/pivoting elongate cylinders  58  and  60  which are utilized for upwardly displacing the curtain  22 . 
         [0032]      FIG. 5  is a succeeding illustration of the fire curtain variant  56  of  FIG. 4  and illustrates the cylinders (exhibited as extensible jacks with multiple coaxial components)  58  and  60  in a semi upwardly extended position, and by which the generally side positioned and combination telescoping/pivoting elongate cylinders are utilized to upwardly displace the curtain  22  in a similar fashion as in  FIG. 2 . The cylinders  58  and  60  are understood to include any type of fluid driven means, such as pneumatic or hydraulic and it is further understood that a CO2 (carbon dioxide) charge or the like can be employed for quickly activating both cylinders in timed and simultaneous fashion in order to quickly elevate the curtain  22 . 
         [0033]    As further shown in  FIG. 5 , the elongate configured and extensible cylinders  58  and  60  each include lower pin ends  62  and  64  which are both traversable along and pivotally connected to outermost width extending tracks, see further associated sections  66  and  68  depicted in phantom and which are defined in the recessed base of the housing  12 . In combination with upper and reinforce corner connections  72  and  74  established between the curtain  22  (see again top bar  31 ) to which are pivotally engaged upper extending ends of the cylinders  58  and  60 , the extensible/pivotal action of the expanding cylinders  58  and  60  occurs simultaneous with laterally outward traversing displacement of the pins  62  and  64  along their bottom supported tracks  66  and  68  (see also directional arrows  76  and  78  in  FIG. 5 ) and until achieving a vertical position shown in  FIG. 6  which is commensurate with that shown in the embodiment of  FIG. 3 . Without limitation, such bottom traversing displacement can be manually assisted by the installer applying an outward pivoting force to lower ends of each expanding cylinder. 
         [0034]    A variation of center bar  40 ′ depicted in  FIG. 6  can again be installed in width extending fashion across a generally midpoint of the curtain, the bar  40  further illustrating opposite end extending “U” shaped clips  80  and  82  such as which secures to intermediate locations associated with the elongate and side extensible cylinders  58  and  60 . It is also envisioned that the top  31  and intermediate  40 ′ support bars can be pre-engaged to locations associated with each of the cylinders  58  and  60 , following which the top bar  31  is extended to its fully upwardly displaced height and the cylinders are engaged or otherwise locked to prevent the inner telescoping members from retracting. 
         [0035]    In addition to each of the telescoping cylinders exhibiting multiple coaxial and inter-expanding sections (as shown), it is additionally envisioned that each can also be reconstructed to include a single lower elongated housing from which a generally similar length elongated inner telescoping member extends, and in order to establish a desired overall height associated with the curtain assembly. As with the first disclosed variant, any type of rigid or tautened ground engaging stanchion supports can be provided, such as including rigid support members (or alternatively tensioning cables) and such as is shown by rigid and interconnected pairs of rods  42  &amp;  44  and  46  &amp;  48  which connect to upper end location  72  of the curtain  22  as well as engaged by turf stakes  52  and  54  at lower ends (it also being understood that a further pair of rigid poles or tautened/stretched cables can be engaged to opposite upper end location  74  (although and in the instance of multiple end to end interconnected housings it would be practicable and necessary to only provide one angled support arrangement per each housing). 
         [0036]    Referring now to  FIG. 7 , an illustration is shown of any variant in which a fire retardant fluid (such as water but also envisioned to include any type of flame retardant spray or misting pattern) is applied in both forwardly/upwardly directed fashion from the aperture locations  21  and  23  associated with the elongated and ground supported housing  12 , reference again being made to the construction of the inter-housing and fluid conveying conduit as depicted in  FIG. 1 . As further shown in  FIG. 8 , and as previously explained in  FIG. 1 , the construction of the individual assemblies  10  is such that an extending hose bib  20  of a given housing is caused to seat within a fluid conduit receiving aperture associated with a receiving location defined in a succeeding and end aligned housing. 
         [0037]    In this fashion, the internal conduit  19  associated with each housing communicates with any selected number of spray issuing apertures, such as again depicted at  21  and  23 . By interconnecting a plurality of housings in the fashion shown in  FIG. 8 , a pressurized fluid inlet (such as provided communicated to an initial one of the curtain assemblies via a hose) provides a consistent spray pattern as shown and in order to further increase the effectiveness of the overall curtain assembly. 
         [0038]    Although not shown, it is envisioned that the vertical side extending edges of each curtain  22  can include any of hook and loop fasteners, sliding or other engagement tracks or the like (see as representatively shown at  84  and  86  in  FIG. 8 ) and so that a unitary interconnected construction is created by any plurality of end-to-end connected housing assemblies shown in  FIG. 8 . In this fashion, a plurality of interengaged and perimeter/front extended fire curtain assembles can provide a reasonable degree of fire/flame retardant interference for protecting, or at least delaying in more extreme instances, the path of travel of grass/brush/shrub fires and the like. 
         [0039]    Having described my invention, other and additional preferred embodiments will become apparent to those skilled in the art to which it pertains, and without deviating from the scope of the appended claims. 
         [0040]    I claim: