Abstract:
A tool which has an easily identifiable marker for each tire on a vehicle. The tool will trace the path of each tire and allow an investigator to accurately produce a drawing to recreate the path of vehicles involved in accidents.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates, in general, to a drawing tool, and, in particular, to a drawing to which aids vehicle accident investigators. 
     DESCRIPTION OF THE PRIOR ART 
     In the prior art various types of devices have been proposed. For example, U.S. Pat. No. 4,815,212 to Wood discloses a block having four spring driven pencil leads which represent different tires on an accident vehicle 
     U.S. Pat. No. 4,299,031 to Collins et al discloses a plotter having four different colors mounted in a plotting device. 
     U.S. Pat. No. 6,351,893 to Pierre discloses a template for diagramming accidents having a plurality of different shapes punched out of a single piece of plastic. 
     U.S. Pat. No. 6,951,375 to Patton et al discloses an apparatus for printing an image on a large surface area using colors. 
     Upon arrival at a collision scene where a vehicle(s) have gone out of control prior to their final resting position, or looking over photographs of skid marks that have crossed each other, it is often difficult determining the path of travel of a vehicle. An investigator often has to look a damage or paint transfers to fixtures or vehicles, tire scuff marks location of gouges, vehicle debris and the final location of the vehicles to determine the occurrence of events. 
     Many times, due to the complexity of tire marks crossing each other an investigator spend hours trying to reconstruct the path of a vehicle involved in an accident. Even after a diagram is drawn, an investigator has to tediously attempt to follow a confusing jumble of lines to determine the exact path of a vehicle. 
     The present invention is a multi purpose tool which can be used to accurately and quickly determine a vehicle&#39;s path after an accident. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to a tool which has an easily identifiable marker for each tire on a vehicle. The tool will trace the path of each tire and allow an investigator to accurately produce a drawing to recreate the tire path of vehicles involved in accidents. 
     It is an object of the present invention to provide a new and improved tool for accident investigators. 
     It is an object of the present invention to provide a new and improved tool that can accurately and quickly provide an accident scene drawing. 
     It is an object of the present invention to provide a new and improved tool that can present a clear drawing of an accident scene 
     These and other objects and advantages of the present invention will be fully apparent from the following description, when taken in connection with the annexed drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a bottom view of the present invention. 
         FIG. 2  is a partial cross-section of a side view of the present invention. 
         FIG. 3  is a partial cross-section of a side view of a modification of the present invention. 
         FIG. 4  is a perspective view of the present invention showing the lines drawn for each tire. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The preferred embodiment herein described is not intended to be exhaustive or to limit the invention to the precise form disclosed. It is chosen and described to best explain the invention so that others, skilled in the art to which the invention pertains, might utilize its teachings. 
     Referring now to the drawings in greater detail,  FIG. 1  shows the bottom of the present invention  1 . The invention has a body or a block  2  with a bottom  9 . The block  2  has four wheels  3  rotatably mounted to the sides of the block. The wheels are shown in  FIG. 1  to be attached by eyehooks  4  however, other mechanical means can be used without departing from the scope of the invention. Four apertures  17  are formed in the block from the top of the block to the bottom  9  and they will receive four markers  5 ,  6 ,  7 ,  8 . 
     As shown in  FIG. 2 , the apertures  17  are formed to taper near the bottom of the apertures at  18  to prevent the markers  5 ,  6 ,  7 ,  8  from coming through the bottom. A roof  10  can be applied to the top of the block  2  to orient the user. Each of the markers are a different color. While the specific colors can be arbitrary it would be convenient if specific colors were always used for each wheel. This would always mark the drawings made with the invention with the same color for each wheel and avoid confusion between investigators or between investigators and attorneys, court officials and others. It is preferred that red (R) be used for the right front tire, black (B) be used for the left front tire, blue (BL) be used for the left rear tire and green (G) for the right rear tire (see  FIG. 4 ). 
     The markers  5 ,  6 ,  7 ,  8  can be held in the apertures  17  by any conventional means. For example, the eyehooks  4  can be aligned with the apertures  17  and intersect the markers when they are placed in the apertures. In this manner the eyehooks will serve as setscrews to secure the markers  5 ,  6 ,  7 ,  8  within the apertures. Another method is shown in  FIG. 3 . Here a spring  11  is inserted into the block  2 ′ (only partially shown in  FIG. 3  for clarity) on top of each marker, then a plate  12  is fastened to the top of the block to trap the screws and the markers within the block  2 ′. It should be noted that only markers  6 ′,  8 ′ are shown in  FIG. 3  however, a spring would be provided for each of the four markers. The plate  12  could be attached to the block  2 ′ by any conventional method. 
       FIG. 4  shows the present invention as it would be used to mark a diagram. It should be noted that the roof has been removed for clarity and each of the markers has been marked with a letter to show the color of the barker. R is used for red and designates the front right side tire. B is for blue and is used for the front left side tire. BL is for black and is used for the left rear side tire. G is for green and is used for the right rear side tire. 
     As shown in  FIG. 4  the vehicle begins to lose control and is entering a clockwise rotation. Line  13  shows the path of the right front tire and is produced by marker  6  (red). Line  14  shows the path of the right rear tire and is produced by marker  8  (green). Line  15  shows the path of the left rear tire and is produced by marker  7  (black). Line  16  shows the path of the left front tire and is produced by marker  5  (blue). As the vehicle continues in a clockwise rotation its left front tire  5  and the right rear tire  14  will cross each other giving a trained investigator proper information about the motion of the vehicle. This information will allow the investigator to quickly identify what occurred and will allow him to make an accurate report. This would be much more difficult if the different colors were not used for the individual tires 
     Although the Collision Tool and the method of using the same according to the present invention has been described in the foregoing specification with considerable details, it is to be understood that modifications may be made to the invention which do not exceed the scope of the appended claims and modified forms of the present invention done by others skilled in the art to which the invention pertains will be considered infringements of this invention when those modified forms fall within the claimed scope of this invention.