Abstract:
A tie down resistive to strong winds for lightweight but bulky equipment. The tie down includes anchors driven into the ground which hold cables that in turn are attached to the base of the equipment.

Description:
FIELD OF THE INVENTION  
         [0001]    Bulky equipment exposed to strong windstorms such as hurricanes are readily overturned or blown away at great cost. An inexpensive and sufficient tie-down is provided to hold them in place.  
         BACKGROUND OF THE INVENTION  
         [0002]    Air conditioning units are commonly placed outside of the structures which they cool in order to provide for heat transfer at the condenser. This equipment is relatively light for its bulk, and is commonly contained in bulky housings that are vented to permit the flow of coolant air, namely atmospheric winds.  
           [0003]    The winds are both a source of coolant, and a risk when the winds are heavy, such as in hurricane conditions. Then there is a well-recognized risk of being blown away. This is a major source of loss from strong windstorms.  
           [0004]    Of course this problem has been recognized, but it is offset by the cumbersome inconvenience of heavy bases, such as concrete bases, which because of their weight can restrain a suitably mounted structure from being blown away. Such heavy bases are difficult to install, and are quite expensive. Generally preference is given to light weight plastic bases which can be readily be carried around and laid in place. These function well in benign times of moderate winds. However they do not have sufficient weight for their combination with a piece of equipment to resist very high winds.  
           [0005]    Another problem relates to where the unit is to be placed. This invention is not directed to installations on roofs or other structures, where heavy bases or complicated tie-down systems are required. Instead it relates to outdoor ground-level installations where a light weight base can be used.  
         BRIEF DESCRIPTIONS OF THE INVENTION  
         [0006]    This invention is directed to the out of doors tying-down of a housing and its enclosed equipment. The object is to secure them from being upset, overturned, or blown away by high winds such as hurricanes. This invention is not dependent on the mass of a heavy base, such as a concrete base.  
           [0007]    Instead, according to this invention, a light weight base such as a honeycombed organic plastic material, which may even be a foam, is used. It is a rigid structure able to support what is placed on it, for example an air conditioner compressor.  
           [0008]    According to this invention, a plurality of rigid clips is attached to the housing or to the base, and preferably to both. A cable connection to each clip at the base extends over and in contact with the edge of the base, to an anchor driven into the ground that tightly pulls on the cable. That is all, and it results in an installation resistant to very high winds.  
           [0009]    The above and other features of this invention will be fully understood from the following detailed description and the accompanying drawings, in which: 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    [0010]FIG. 1 is a side view partly in cutaway cross-section, showing the invention tying down a compressor housing;  
         [0011]    [0011]FIG. 2 is a perspective view showing the invention partly installed;  
         [0012]    [0012]FIG. 3 is an exploded view of an unassembled tie-down; and  
         [0013]    [0013]FIG. 4 is a fragmentary view of the bottom of the base. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0014]    A housing  10  is shown of the type which customarily houses equipment that is to be installed outdoors. The internal mechanism, which is of no particular interest to this invention and is therefore not shown, requires the flow of air through louvers  11  in the housing and over the enclosed equipment. A frequently encountered example is condensers for air conditioners. Customarily air is brought through the housing by a fan, but sometimes only by the routine flow of air current.  
         [0015]    In any event, it must be sufficiently closed as to exclude persons and animals, or parts of them, as well as trash and debris. In gentle breezes, the weight of the equipment alone will hold the total assembly in place. However, in hurricane velocities, it can be overcome.  
         [0016]    While many jurisdictions accept the risks inherent in lightweight bases as they are presently employed, there are others that require a heavier-weight concrete base, thereby denying the benefits of light plastic bases. It is submitted that, instead of requiring heavy bases (and often insufficient tying of the device to the heavier base), a suitably anchored light weight base with equipment suitably connected to the ground will function as well as, or better.  
         [0017]    The tie-down contemplated by this invention includes only a light weight base  12 , often rigid polyurethane (solid or foam) which usually will be rectangular, with a top surface  13  and a bottom surface  14 .  
         [0018]    The condenser or other equipment (not shown) is placed on the base, and housing  10  is placed over it.  
         [0019]    The base will have a dimension  15  of thickness. Its bottom surface  14  (FIG. 4) is honeycombed by pockets  16  which have ribs  17  between them. The pockets rise only part way up into the base. Thus the weight is lighter, but the vertical strength remains adequate for the purposes. The base has a peripheral upper edge  18 . A typical base will be about 2-3 inches tall, with internal ribs about {fraction (1/4)} inch thick.  
         [0020]    A pair of clips  20 ,  21  is fixed to the housing and to the base. Because they are alike, only clip  20  and its related apparatus are described in detail.  
         [0021]    Clip  20  is bent to form a first flange  22  and a second flange  23  formed by bending the clip to shape. Flange  22  is secured to the housing near the bottom edge  24  of the housing by fasteners  25  which may be as simple as thread-tapping screws, or even adhesives.  
         [0022]    Second flange  23  is secured to the upper surface of the base, again by fasteners  26 , which may be as simple as nails or expansion bolts of sufficient length to provide a good grip in the plastic base, or adhesives.  
         [0023]    A cable  27  is retained to the second flange. The cable may be a high strength wire cable covered by plastic, or any other suitable flexible non-extensible rope or cable.  
         [0024]    An anchor  30  is attached to the free end  31  of the cable. The anchor is of a type that can be driven into the ground by a tool, and will resist being pulled out after insertion into the ground. Toggles and barbed spears are recognized forms of such anchors. As shown, the anchor has a lead end  33 , and a recess  34  to receive a tool that will drive the anchor into the ground  35 . It bears against the upper edge of the base. After being driven lead end first into the ground, a pull on the cable will be resisted by the anchor and thereby will hold the base to the ground. The clip holds the housing to the base. The tension on the cable will largely be determined by how hard the anchor is driven into the ground and whether the ground around and above the anchor is filled or hardened.  
         [0025]    Two clips will ordinarily be sufficient. If greater assurance is desired, then more clips, cables and anchors may be used, perhaps on the other sides of the housing.  
         [0026]    Connecting both flanges of the clip to adjacent structure is preferred. However, fasteners  26  to second flange  23  can be omitted. Also, the term “fastener” is intended to include any means to hold a flange to adjacent structure, for example cements and adhesives. An advantage of this invention is the lack of need for surface preparation before installing the fastener.  
         [0027]    This simple construction enables a device to be held down by a tension limited only by the force exerted on the anchors to drive them into the ground. The resulting arrangement is at once elegantly simple and surprisingly reliable.  
         [0028]    This invention is not to be limited by the embodiment shown in the drawings and described in the description, which is given by way of example and not of limitation, but only in accordance with the scope of the appended claims.