Abstract:
A blade adapter for a hacksaw is connected to the spine of the hacksaw and includes three connection portions. The hacksaw blade is connected between the engaging portion connected to the handle of the hacksaw and one of the three connection portions of the blade adapter to set the hacksaw blade at two different angular positions relative to the spine. The hacksaw blade can be set to be parallel to the spine or at an angle relative to the spine. A jabsaw blade is able to be connected to the front end of the hacksaw.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a hacksaw, and more particularly, to a hacksaw blade adapter which adjusts the angle of the hacksaw blade relative to the frame of the hacksaw, and is able to be connected with a jabsaw blade. 
       BACKGROUND OF THE INVENTION 
       [0002]    U.S. Pat. No. 2,658,541 discloses a typical hacksaw and U.S. Pat. No. 5,471,752 discloses a hacksaw with a means for increasing the tension of the blade. U.S. Pat. No. 7,174,644 discloses a hacksaw wherein the angle between the blade and the hacksaw frame can be adjusted, and a jabsaw blade is able to be connected to the front end of the hacksaw frame. U.S. Pat. No. 6,134,791 discloses a tension means for adjusting the tension of the hacksaw blade. 
         [0003]    The present invention intends to provide a blade adapter for a hacksaw and the blade adapter allows the blade to be installed to the hacksaw at different angles. Furthermore, the blade adapter can be connected to a jabsaw blade at the front end of the hacksaw. 
       SUMMARY OF THE INVENTION 
       [0004]    The present invention relates to a blade adapter for a hacksaw, and the blade adapter comprises a first end and a second end. An engaging portion is located at the first end of the blade adapter and an anti-slip surface is defined in the underside of the engaging portion. A first connection portion is located on the top surface of the second end of the blade adapter and has a first protrusion extending therefrom. A second connection portion extends from the bottom surface of the second end of the blade adapter and has an inclined surface. A second protrusion extends from the inclined surface. A third connection portion is located on one side of the second end of the blade adapter and a third protrusion extends from the third connection portion. The hacksaw blade is connected between the engaging portion and one of the connection portions. 
         [0005]    The primary object of the present invention is to provide a blade adapter for a hacksaw. The blade adapter is connected to the spine of the hacksaw and includes three connection portions. The hacksaw blade is connected between the engaging portion connected to the handle of the hacksaw and one of the three connection portions of the blade adapter to set the hacksaw blade at two different angular positions relative to the spine. The hacksaw blade can be set to be parallel to the spine or at an angle relative to the spine. A jabsaw blade is able to be connected to the front end of the hacksaw. 
         [0006]    The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]      FIG. 1  is a perspective view to show the blade adapter of the present invention; 
           [0008]      FIG. 2  is another perspective view, from the underside of the blade adapter of the present invention; 
           [0009]      FIG. 3  is an exploded view to show that the bladed adapter is connected to the hacksaw frame to set the hacksaw blade to be parallel to the spine of the hacksaw; 
           [0010]      FIG. 4  is a perspective view to show combination as disclosed in  FIG. 3 ; 
           [0011]      FIG. 5  is another perspective view, from the underside of the combination as disclosed in  FIG. 4 ; 
           [0012]      FIG. 6  is an exploded view to show that the bladed adapter is connected to the hacksaw frame to set the hacksaw blade to be parallel to the spine of the hacksaw, and a jabsaw blade is to be connected to the hacksaw; 
           [0013]      FIG. 7  is a perspective view to show combination as disclosed in  FIG. 6 ; 
           [0014]      FIG. 8  is an exploded view to show that the bladed adapter is connected to the hacksaw frame to set the hacksaw blade to be at angle relative to the spine of the hacksaw, and 
           [0015]      FIG. 9  is a perspective view to show combination as disclosed in  FIG. 8 . 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0016]    Referring to  FIGS. 1 and 2 , the hacksaw blade adapter  10  of the present invention is a substantially rectangular member comprises a top surface  11 , a bottom surface  12 , a left side  13 , a right side  14 , a first end  15  and a second end  16 . Two openings  171 ,  172  are defined in the right side  14  of the blade adapter  10  and located close to the first end  15  of the blade adapter  10 . An engaging portion  20  is located between the two openings  171 ,  172 . The engaging portion  20  has a threaded hole  201  defined therethrough and an anti-slip surface  202  is defined in the underside of the engaging portion  20 . A first connection portion  22  is located on the top surface  11  of the second end  16  of the blade adapter  10  and has a first protrusion  221  extending therefrom. A second connection portion  23  extends from the bottom surface  12  of the second end  16  of the blade adapter  10  and located in opposite to the first connection portion  22 . The second connection portion  23  has an inclined surface  231 . A second protrusion  232  extends from the inclined surface  231 . The third connection portion  24  extends from the left side  13  of the second end  16  of the blade adapter  10  and bends an angle. A gap  25  is defined between the third connection portion  24  and the left side  13  of the second end  16  of the blade adapter  10 . A third threaded hole  242  is defined in the third connection portion  24 . 
         [0017]    As shown in  FIGS. 3 to 5 , the blade adapter  10  is connected to the hacksaw  50 . The hacksaw  30  includes a spine  31 , a handle  32  connected to the first end  311  of the spine  31  and a tension device  33  connected to the handle  32 . The tension device  33  can be any known one available in the market. The second end  312  of the spine  31  has a hollow and rectangular end to form a reception chamber. The second end  312  of the spine  31  includes a locking hole  313  defined through the wall thereof and a rib  314  is located in the reception chamber. The engaging portion  20  of the blade adapter  10  is engaged with the second end  312  of the spine  31  and the rib  314  fills in the space between the second end  312  of the spine  31  and the engaging portion  20  so that the connection between the engaging portion  22  and the second end  312  of the spine  31  is secured. A bolt  44  threadedly extends through the locking hole  313  and the threaded hole  201  to fix the engaging portion  20  in the second end  312  of the spine  31   
         [0018]    The blade adapter  10  extends downward from the spine  31  and a blade  34  has the first end thereof connected to the tension device  33  and the second end of the blade  34  is connected to the first protrusion  221  of the first connection portion  22  of the blade adapter  10 . A frame is formed by the blade adapter  10 , the spine  31  and the handle  32 . The blade  34  is secured to the frame and parallel to the spine  31 . 
         [0019]    The tension device  33  provides a first surface  331  which is similar to the surface of the first connection portion  22 . The cutting edge  341  of the blade  34  faces the downward direction of the hacksaw  30  as shown in  FIGS. 4 and 5 . Furthermore, the tension device  33  also provides a second surface  332  which is similar to the surface of the second connection portion  23 . When the blade  34  is connected between the second surface  332  and the surface of the second connection portion  23 , the cutting edge  341  of the blade  34  faces inclinedly relative to the hacksaw  30 . 
         [0020]    As shown in  FIGS. 6 and 7 , a jabsaw blade  50  can be connected to the hacksaw  30  when the blade adapter  10  is installed to the hacksaw  30  as disclosed in  FIGS. 3 to 5 . The jabsaw blade  50  has one end thereof inserted into the space between the anti-slip surface  202  of the engaging portion  20  and the second end  312  of the spine  31 , so that the jabsaw blade  50  extends from the front end of the hacksaw  30 . The bolt  44  extends through the locking hole  313  of the second end  312  of the spine  31  and the threaded hole  201  of the engaging portion  20  and the positioning hole  51  of the jabsaw blade  50  to fix the jabsaw blade  50 . The anti-slip surface  202  is functioned to prevent the slip of the jabsaw blade  50 . Besides, when the tension device  33  adjusts the blade  34 , the blade adapter  10  is also positioned. The jabsaw blade  50  is thicker and shorter than the blade  34 , and the jabsaw blade  50  is cantilevered from the front end of the spine  31  so that the jabsaw blade  50  is used to cut harder objects. The jabsaw blade  50  can be stored in the inside of the spine  31  when not in use. 
         [0021]    As shown in  FIGS. 8 and 9 , the blade adapter  10  is connected to the hacksaw  30  in the second direction, wherein the first end  15  of the blade adapter  10  is inserted into the second end  312  of the spine  31  and the blade adapter  10  is accommodated in the spine  31 . The second connection portion  23  is exposed from the second end  312  of the spine  31 . The third connection portion  24  is located beneath the second end  312  of the spine  31 . The bolt  44  threadedly extends through the threaded hole  241  of the third connection portion  24 . A frame is formed by the spine  31 , the handle  32  and the blade adapter  10  so that the blade  34  is connected to the frame. The blade  34  is located at an angle, about 45 degrees, relative to the spine  31 . This embodiment shortens the front end of the hacksaw  30  which is then can be operated in a narrow space. 
         [0022]    While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.