Abstract:
A drill bit extension device is disclosed for use with a quick release drill chuck, the device including a body portion for securing a replacement drill bit and a stem structured and arranged for insertion into the quick release drill chuck.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    The present invention relates generally to a quick change drill bit extension and driver. More specifically the quick change drill bit extension allows for rapid replacement of drill bits into the drill extension without the need to operate a drill chuck. 
         [0002]    Drill bit sets include bits of varying sizes. Prior art drill bit extension devices or adapters have included a precast drill chuck adapter molded together with the individual drill bit. With modern power drills, there is typically a quick change chuck allowing the user to quickly change a drill bit that includes the chuck adapter. A problem arises when a drill bit wears out or breaks and the user is left with a drill bit kit with less than all the necessary size drill bits. Currently, in order to replace the broken drill bit the user needs to purchase another entire set which is costly and wasteful. 
         [0003]    As such there is exists a need for a replacement chuckless drill bit adapter designed for use with multiple sized drill bits. 
       SUMMARY OF THE INVENTION 
       [0004]    The present invention includes a chuckless drill bit adapter designed for use with multiple sized drill bits. 
         [0005]    In one aspect, the present invention includes a drill bit extension device for use with a quick release drill chuck, the device including a body portion, a stem structured and arranged for insertion into the drill chuck and to be secured within the drill chuck, the stem connected to the body portion, the body portion includes an upper face and a lower face, the lower face for engaging with the drill chuck, the upper face including a drill bit bore substantially perpendicular thereto and for receiving a drill bit, a set screw bore substantially perpendicular to the drill bore, the set screw bore in gas communication with the clearance bore and for receiving a set screw to secure the drill bit within the main body portion. 
         [0006]    In some embodiments the stem portion includes at least one undercut for engagement with the drill chuck. In some embodiments the clearance bore, the stem and the body portion are hexagonal shaped. 
         [0007]    In some embodiments the stem is connected to the body portion with an undercut portion. 
         [0008]    In some embodiments the device has a length of about 1.5 inches, the stem has a length of about 0.34 inches, the body portion has a length of about 0.3 inches, the clearance hole has a width of about 0.25 inches and a depth of about 0.53 inches. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    While the specification concludes with claims particularly pointing out and distinctly claiming the present invention, it is believed the same will be better understood from the following description taken in conjunction with the accompanying drawings, which illustrate, in a non-limiting fashion, the best mode presently contemplated for carrying out the present invention, and in which like reference numerals designate like parts throughout the Figures, wherein: 
           [0010]      FIG. 1  shows a side view of a drill bit extension device according to one embodiment of the present invention; 
           [0011]      FIG. 2  show a rotated view of the drill bit extension device as shown in  FIG. 1  according to one embodiment of the present invention; and 
           [0012]      FIG. 3  shows an end view of the drill bit extension device as shown in  FIG. 1  according to one embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0013]    The present disclosure will now be described more fully with reference to the Figures in which an embodiment of the present disclosure is shown. The subject matter of this disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. 
         [0014]    A feature of this invention is to allow users to quickly changes drill bit sizes while in a work environment without the need to purchase an entire set of molded quick release chuck drill bits. Referring now to  FIG. 1  there is shown a side view of the drill bit extension device  10 . Device  10  includes stem  13  on one end and a head portion  23  on the other end. Stem  13  includes under cut  15 , such that when stem is inserted into the chuck of a drill, the tines of the chuck engage undercut  15  and secure device  10  to the drill. Undercut  15  is preferably shaped into an arcuate cylinder with radius R. Radius R is preferably about 0.18 inches but may be other dimensions and shapes in order to fit various size chucks. 
         [0015]    Device  10  also includes transition undercut  20  between stem  13  and head portion  23 . Undercut  20  provides an air gap between a drill chuck and the head portion  23  of device  13 . Undercut  20  may serve as a weight saving measure as well as an additional undercut for some drill chucks to use as a grasping point. Undercut  20  is also preferably shaped into an arcuate cylinder with radius M. Radius M is preferably about 0.25 inches but may be other dimensions and shapes in order to fit various size chucks. 
         [0016]    Head portion  23  is designed to capture and secure therein a replacement drill bit. Head portion further includes lower body portion  25  with a lower face  21 . Lower face  21  is preferably a flat substantially smooth surface suitable for abutment up against the chuck of a drill. Head portion also includes undercut  30  which is preferably shaped into an arcuate cylinder with radius N. Radius N is preferably about 0.47 inches but may be other dimensions and shapes. Head portion  23  also includes upper body portion  27  with upper face  33 . Lower portion  25  and upper portion  27  are preferably shaped with multiple flat sides and may be in a hexagonal pattern having a mean width X as shown in  FIG. 3 . Width X is preferably about 0.50 inches. Other shapes and sizes may work equally as well dependent upon the size of the drill bit to be retained within device  10 . 
         [0017]    Head portion  23  further includes clearance hole  35  bored substantially perpendicular to face  33 . Clearance hole  23  is shaped and sized for receiving multiples sized and shaped drill bits (not shown). Set screw hole  40  is preferably bored through head portion  25  substantially perpendicular to clearance hole  35  and is gas communication with clearance hole  23 . A set screw is not shown however any suitable screw may be employed to secure the drill bit once inserted into clearance hole  35 . 
         [0018]    Referring now to  FIG. 2  there is shown device  10  in a rotated view. In addition to the dimension described above, device  10  also has multiple dimensions as shown in  FIG. 2  including A, B, C, D, E, F, G and H. Stem portion  13  is also preferably shaped with multiple flat sides and may be in a hexagonal pattern having a mean width A. Width A is preferably about 0.25 inches. Length B is preferably about 1.575 inches. Length C is preferably about 0.09 inches. Length D is preferably about 0.36 inches. Length E is preferably about 0.25 inches. Length F is preferably about 0.245 inches. Length G is preferably about 0.18 inches. Length H is preferably about 0.25 inches. Notwithstanding all of the preferred shapes, sizes and tolerances for each of the above-referenced dimensions, other shapes, sizes and tolerances, however work equally as well dependent upon the size of the drill bit to be retained within device  10  and the size and shape of the drill chuck receiving stem  13 . 
         [0019]    Referring now to  FIG. 3  there is shown an end on view of device  10  as shown in  FIG. 2 . Head portion  23  can be shown with a hexagonal shape and a mean width dimension X. Preferable mean width X is about 0.50 inches. Clearance hole  25  has a radius Y, which is preferably about 0.250 inches. In addition, clearance hole may have a depth of about 0.53 inches. As stated above other sizes and shapes may be applied to these dimensions as well. 
         [0020]    It will be apparent to one of skill in the art that described herein is a novel system and method for automatically modifying a language model. While the invention has been described with reference to specific preferred embodiments, it is not limited to these embodiments. The invention may be modified or varied in many ways and such modifications and variations as would be obvious to one of skill in the art are within the scope and spirit of the invention and are included within the scope of the following claims.