Abstract:
A telescoping door security bar for preventing intruders from entering a room. The telescoping door security bar uses a bolt and cotter pin, which are inserted completely through the door security bar to make it more stable.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    The present invention relates to security systems, and more particularly, to security systems for preventing entry through a doorway. 
         [0002]    Locks and deadbolts and combinations thereof are common security measures to control the opening of a door way entrance to a room or a dwelling. However, when these items fail or are rendered useless by an intruder, there is nothing left to prevent the opening of the door and stopping an intruder&#39;s entry into the area. 
         [0003]    As can be seen, there is a need for a security device that prevents the opening of a door when locks and deadbolts fail or rendered useless. 
       SUMMARY OF THE INVENTION 
       [0004]    In one aspect of the present invention, a telescopic security apparatus is provided which has a first tubular member having a yoke attached to a top end thereof; a second tubular member having a foot operatively attached to a bottom end thereof, wherein the first tubular member is telescopically coupled with the first tubular member; a plurality of apertures defined in a first spaced apart relation through an opposed sidewall of the first tubular member; a plurality of cooperating apertures defined in a second spaced apart relation through an opposed sidewall the second tubular member in; and a bolt received through a selected aperture and a selected cooperating aperture. The telescopic security apparatus foot is provided with a frictional surface defined on a lower surface thereof adapted for non-slipping frictional engagement with a floor surface. The bolt may further include a hole extending through a transverse axis thereof. The telescopic security apparatus may also include a retaining pin received in the hole. In a preferred embodiment, the yoke is adapted to substantially surround a shaft of a doorknob. 
         [0005]    Other aspects of the invention included a method of securing a doorway, the method including: 1) providing a telescopic door security bar having a first tubular member having a yoke attached to a top end thereof; a second tubular member having a foot operatively attached to a bottom end thereof, wherein the first tubular member is telescopically coupled with the first tubular member; a plurality of apertures defined in a first spaced apart relation through an opposed sidewall of the first tubular member; a plurality of cooperating apertures defined in a second spaced apart relation through an opposed sidewall the second tubular member in; and a bolt received through a selected aperture and a selected cooperating aperture; 2) positioning the yoke around a shaft of a door knob; 3) positioning the foot in a non-slipping frictional contact with a floor surface. The method may also include providing the foot with a frictional lower surface adapted for non-slipping frictional engagement with the floor surface. The method may also include providing a hole through a transverse axis of the bolt and inserting a retaining pin through the hole. The method may also include adjusting the length of the security bar by inserting the bolt through a different selected aperture and an alternative cooperating aperture. 
         [0006]    These and other features, aspects and advantages of the present invention will become better understood with reference to the following drawings, description and claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]      FIG. 1  is a perspective view of the door security bar, shown in use. 
           [0008]      FIG. 2  is a perspective view of the door security bar. 
           [0009]      FIG. 3  is an exploded view of the door security bar. 
           [0010]      FIG. 4  is a section view of the door security bar, taken along line  4 - 4  in  FIG. 1 . 
           [0011]      FIG. 5  is a section view of the door security bar, taken along line  5 - 5  in  FIG. 4 . 
           [0012]      FIG. 6  is a section view of the door security bar, illustrating the removal of pin  20  and bolt  18  to adjust upper tube  10 . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0013]    The following detailed description is of the best currently contemplated modes of carrying out exemplary embodiments of the invention. The description is not to be taken in a limiting sense, but is made merely for the purpose of illustrating the general principles of the invention, since the scope of the invention is best defined by the appended claims. 
         [0014]    Broadly, an embodiment of the present invention provides a telescopic door security bar for preventing intruders from opening doorway and entering a room. 
         [0015]    As best seen in reference to  FIG. 1 , a telescoping door security bar includes an elongate bar having an upper tubular member  10  and a lower tubular member  12  in which one tubular member is received within the other tubular member in a telescopic relation. The upper  10  and lower  12  tubular members may be formed of any shaped tube material, round, box, triangular and the like. Preferably the tubular members  10 ,  12  are formed of a high strength material such as steel, aluminum, composites, or carbon graphite. 
         [0016]    The upper tubular member  10  has a doorknob yoke  14  operatively attached to a top end of the upper tubular member  10 . The yoke  14  is adapted to surround the shaft of a doorknob  36  which is attached to a door  34  to control the opening of the door  34  into a structure, such as a room of a dwelling. 
         [0017]    The lower tubular member  12  includes a foot  16  operatively attached to a bottom end of the lower tubular member  12 . Preferably, the foot  16  is formed to have a frictional lower face so that it may frictionally engage with a floor surface  38 , such as tile, hardwoods, carpeting, and the like. In a preferred embodiment the frictional surface may include a rubberized surface. In other embodiments, the frictional surface may include a textured surface. In a preferred embodiment the upper tubular member  10  is received within the lower tubular member  12 . 
         [0018]    One or more of apertures  24  are defined through the lower tubular member  12  in a spaced apart relation and substantially perpendicular to a longitudinal axis of the lower tubular member  12 . The upper tubular member  10  may also have one or more cooperating apertures  26  defined through the upper tubular member  10  and are similarly defined in a spaced apart relation and aligned substantially perpendicular to a longitudinal axis of the upper tubular member  10 . 
         [0019]    A bolt or pin  18  is received through the apertures  24  of the lower tubular member  12  and the cooperating apertures  26  of the upper tubular member  10 . The bolt or pin  18  includes a hole  22  defined through a transverse axis of the bolt  18  that is adapted to receive a retaining pin, such as a cotter pin  20 . The length of the door security device may be selectably adjusted by the user selecting the appropriate aperture  24  and cooperating aperture  26  to obtain the desired length of the security device. 
         [0020]    The length of the device is adjustable to accommodate the height of the doorknob  36  with respect to the floor surface  38 . The length of the device is also adjustable to accommodate for the width of a hall way or passage way within the doorway, that may be defined by an interior wall structure, such as an entryway to a home or dwelling. With the telescopic door security bar of the present invention in place, the opening of the door is prevented in the event a lock or deadbolt is rendered inoperative by an intruder. 
         [0021]    It should be understood, of course, that the foregoing relates to exemplary embodiments of the invention and that modifications may be made without departing from the spirit and scope of the invention as set forth in the following claims.