Abstract:
A system for isolating wall hung equipment from shock and vibration including a wall mountable support or fixture having a first member for securing to a wall and a second member for securing to equipment with a plurality of triad elastomers mounted therebetween to cantleverly support the equipment and at the same time isolate the equipment from shock and vibration. The elastomer mounts while permitting displacement of the members with respect to one another inhibit the members from contacting each other when one or the other is subject to shock or vibration.

Description:
FIELD OF THE INVENTION  
         [0001]    This invention relates generally to shock isolated systems and, more specifically, to a wall mounted display that is cantileverly supported and isolated from harmful shock and vibration forces though shear resistance of a plurality of elastomer mounts.  
         CROSS REFERENCE TO RELATED APPLICATIONS  
         [0002]    None.  
         STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT  
         [0003]    None  
         REFERENCE TO A MICROFICHE APPENDIX  
         [0004]    None  
         BACKGROUND OF THE INVENTION  
         [0005]    Various elastomeric materials have been used, or suggested for use, to provide shock and/or vibration damping as stated in U.S. Pat. No. 5,766,720, which issued on Jun. 16, 1998 to Yamagisht, et al. These materials include natural rubbers and synthetic resins such as polyvinyl chlorides, polyurethane, polyamides polystyrenes, copolymerized polyvinyl chlorides, and polyolefine synthetic rubbers as well as synthetic materials such as urethane, EPDM, styrene-butadiene rubbers, nitrites, isoprene, chloroprenes, propylene, and silicones. The particular type of elastomeric material is not critical but urethane material sold under the trademark Sorbothane® is currently employed. Suitable material is also sold by Aero E.A.R. Specialty Composites, as Isoloss VL. The registrant of the mark Sorbothane® for urethane material is the Hamiltion Kent Manufacturing Company (Registration No. 1,208,333), Kent, Ohio 44240.  
           [0006]    Generally, the shape and configuration of elastomeric isolators have a significant effect on the shock and vibration attenuation characteristics of the elastomeric isolators. The elastomeric isolators employed in the prior art are commonly formed into geometric 3D shapes, such as spheres, squares, right circular cylinders, cones, rectangles and the like as illustrated in U.S. Pat. No. 5,776,720. These elastomeric isolators are typically attached to a housing to protect equipment within the housing from the effects of shock and vibration.  
           [0007]    In contrast to prior art devices that provide compressional support for an article, the present invention comprises a wall mountable display for cantileverly supporting articles such as display equipment or the like in a spaced condition form a support wall with a set of triad elastomers that are positioned between the wall and the equipment to cantileverly support the weight of the equipment while at the same time isolating the equipment from shock and vibration.  
           [0008]    One of the difficulties with wall mounting sensitive equipment, such as a digital display system is to prevent the sensitive electronic equipment from receiving excessive shock and vibration from the support surface it is secured to. The shock and vibrations can come from a number of different sources. For example, excessive shock and vibrations forces can be encountered in a ship, a land vehicle or even a building which is subject to periodic earthquakes. This problem is particularly acute with costly sensitive equipment such as large screen displays which could easily be destroyed by shock and vibration forces. Because it is both costly and difficult to mount an expensive large screen display equipment in a condition that is free of harmful shocks or vibrations the safe course has been to sacrifice the quality of the more costly equipment for the lesser quality of less costly alternative equipment. For example, rear projection units are used in place of large screen digital displays in order to avoid putting a costly large screen digital display at risk from harmful shocks and vibration forces. Unfortunately, the result is that in many cases the overall system quality suffers since such systems do not provide the user the sharp image of higher quality display systems. The tradeoff of quality for costs is addressed by the present invention that provides a fixture for supporting sensitive equipment with the fixture isolating the sensitive equipment from the effects of shock and vibration forces to avoid putting the sensitive equipment at risk.  
         SUMMARY OF THE INVENTION  
         [0009]    A wall mounted display including a system for isolation of wall hung equipment from harmful shock and vibration forces including a wall mountable support or fixture having a first member for securing to a wall and a second member for securing to equipment with a plurality of triad elastomers mounted therebetween to cantileverly support the weight of the equipment and at the same time isolate the equipment from shock and vibration forces through a shearing action within the elastomer mounts. The elastomer mounts, while permitting displacement of the members with respect to one another inhibit the members from contacting each other when one or the other is subject to shock or vibration. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    [0010]FIG. 1 is a front view of a wall mountable fixture with a portion of the one of the members cut away to reveal a triad elastomer used with the present invention.  
         [0011]    [0011]FIG. 2 is a side view showing one of the members of the wall mountable fixture secured to a wall and the other member supporting a digital display system.  
         [0012]    [0012]FIG. 3 is the perspective view of a double triad elastomer used in the wall mountable fixture of FIG. 1.  
         [0013]    [0013]FIG. 4 is a side view of wall mounted elastomers cantileverly supporting an equipment operators chair. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0014]    [0014]FIG. 1 shows a front view of a wall mountable fixture or isolator  10  having a first rigid plate member  11  positioned rearward of a second rigid plate member  12 . Extending between rigid plate member  11  and rigid plate member  12  are a plurality of triad elastomers  13 ,  14 ,  15 ,  16 ,  17  and  18 . The Triad elastomers are more fully described in copending application titled Double Triad Elastomer Mount filed Feb. 8, 2001, Ser. No. 09/779,423 and is herein incorporated by reference. A feature of the triad elastomers is that the compressive forces on opposite ends of the triad elastomer produce a shearing action within the elastomer mount rather than a material compression. The result is that the elastomer mounts, which act in shear mode rather than compression mode, provide effective damping of shock and vibration forces.  
         [0015]    [0015]FIG. 2 is a side view showing fixture  11  secured to wall to  9  by fastening members  19  and  21 , which may be screws bolts or the like. Secured to member  12  by fasteners  21 , which may be screws bolts or the like, is a large screen display  20 . Large screen display systems are known in the art and will not be described herein except to point out that such high systems are generally costly and lack the ability to withstand shocks and vibrations encountered in various environments.  
         [0016]    [0016]FIG. 2 illustrates that the double triad elastomers provide the sole cantilever support between plate member  11  and plate member  12 . With the wall mountable fixture  10  located in the position shown the weight of the large screen display  20  acts downward as indicated by force arrow F 1  thereby inducing a shear force to each of the cantileverly extending triad elastomers. In addition, large screen display  10  produces a slight torque as indicated by arrows F 2  and F 3 . Although the torque produces a compression force on elastomer  18  and a tension force on elastomer  13  the triad elastomer responds to a compressive force by providing shear resistance. In the embodiment shown the shear forces within the elastomer mounts absorb the static weight of the large screen display  20 . In addition the elastomer mounts, which are under tension or compression forces, utilize the shear resistance of the elastomer mounts to absorb energy from shock and vibration forces. While a large screen display has been illustrated the wall mountable member is suitable for use with other sensitive equipment that need to be isolated from shock and vibration.  
         [0017]    [0017]FIG. 3 shows a pictorial view of a triad elastomer mount or single isolator  30  for providing shock and vibration attenuation while providing axially offset support. Isolator  30  is a two-tetrahedron shock isolator  30  for simultaneously isolating shocks and for cantileverly supporting a static load Tetrahedron shock isolator  30  comprises an elastomer material, having a set of integral side walls forming a first tetrahedron isolator  31  with a tetrahedron shaped cavity  31   c  therein and a second tetrahedron shock isolator  32  with a tetrahedron shaped cavity  32   c  therein. A central axis  33  is shown extending through an apex end  32   a  and an apex end  31   a . Apex end  31   a  and apex end  32   a  are smoothly joined to each other to form a one-piece two-tetrahedron shock isolator. The top tetrahedron isolator  32  has a triangular shaped base end for forming a first support surface  32   b . Similarly, the bottom tetrahedron isolator  31  has a triangular shaped base end for forming a second support surface  31   b . The conjunction of the two-tetrahedron isolator provides an integral force transfer region with both the triangular shaped base ends  31   a  and  32   a  of the two-tetrahedron isolator  31  and  32  laterally offset with respect to the minimum cross-sectional area which occurs at the apex conjunction of the tetrahedron shock isolator  31  and  32 . That is, a line parallel to axis  33  that extends through first support surface  32   b  does not extend through the conjoined region between the apex of the two-tetrahedron isolators  31  and  32 . Similarly, a line parallel to axis  33  that extends through the second support surface  31   b  does not extend through the conjoined region between the two apexes of the two-tetrahedron isolators  31  and  32 . As can be seen from FIG. 3 the support surface  32   b  even though identical in shape to support surface  31   b  are rotationally displaced from each other as well as laterally displaced from each other so compressive forces on the end of elastomer mount  30  do not produce compression forces in elastomer mount  30  but instead produce shear forces which can effectively damp shock and vibration forces.  
         [0018]    [0018]FIG. 4 is a side view of another embodiment of the invention wherein a wall  42  cantileverly connects to an operators chair  43 . A first triad elastomer  40  has one end secured to the back of chair  43  by a suitable adhesive and the other and secured to wall  42  by a suitable adhesive. Similarly, triad elastomer  41  has one end secured to the back of chair  43  by a suitable adhesive and the other and secured to wall  42  by a suitable adhesive. While only two elastomers are shown, a third triad elastomer mount (not shown) is mounted thereon to provide a three point connection between the wall and the chair  43 . If desired, more triad elastomer mounts could be used With the present invention one can obtain maximum shock and vibration damping by using elastomer mounts which are solely in a shear mode.  
         [0019]    In operation of the cantilevered chair  43  the operator sits on cushion  45  while resting his or her back against backrest  44 . The console and keyboard  46  is positioned in front of the operator&#39;s chair  43 . In the embodiment shown one end of double triad elastomers  40  and  41  are adhesively secured directly to the chair  43  and the other end of the double triad elastomer mounts are adhesively secured directly to wall member  42 . That is, in certain applications the wall  42  or a portion of the equipment can be directly secured to the double triad elastomers without the use of separate plate members. In order to reduce torsional forces on an individual elastomer it is preferred to space the elastomer members laterally from each other.  
         [0020]    Thus the present invention also includes a method of isolating a wall hung article from shock and vibration comprising the steps of: 1. securing a first end of a first elastomer mount to one surface of an article; 2. laterally securing a first end of a second elastomer mount to the one surface of an article; 3. securing a second end of the first elastomer to a support surface; and 4. laterally securing a second end of the second elastomer to the support surface whereby the first elastomer mount and the second elastomer mount cantileverly support the article with each of the elastomer mounts having laterally offset support surfaces to provide shear resistance to compressive forces thereon.