Abstract:
A cutter of juicer includes three arcuate blades arranged in equiangular positions and at different horizontal levels. Each blade has a convex side forming a plurality of serrate knife teeth for reaming foods rapidly when the blades rotate.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a cutter disposed on a bottom end of a container of a juicer for reaming foods.  
         [0003]     2. The Prior Arts  
         [0004]     An average juicer is usually provided with a container on a base, in which a cutter is fixed on the base and in the container; and a motor having its central shaft connected with the cutter is disposed in the base. When the motor is powered, the cutter is driven to rotate and ream food in the container.  
         [0005]     In the structure of a conventional cutter of a juicer, a blade is arranged on two opposite sides of the central shaft respectively. Since those two blades mounted on the central shaft are positioned at the same height level, irrespective of their shapes, either straight or curved, when reaming food, in addition to their simple configuration, the blades always irritate and crush the food only along the same path at the same height level, which is considered lack of efficiency and in need of a longer time to complete the crush job.  
       SUMMARY OF THE INVENTION  
       [0006]     The primary object of the present invention is to provide an improved cutter of juicer with a better working efficiency than a conventional one, when working under a same rotation speed.  
         [0007]     A secondary object of the present invention is to provide an improved cutter of juicer with a better working efficiency, by which saving power to obtain economic benefit is possible.  
         [0008]     In order to realize mentioned objects, the juicer cutter in accordance with the present invention is constructed by distributing three arcuate blades in equiangular positions and at different horizontal levels, in which each blade is provided at a convex side thereof with a plurality of serrate knife teeth for reaming foods rapidly when the blades are driven to rotate.  
         [0009]     When compared with a conventional juicer cutter, the juicer cutter of the present invention would present a better working efficiency in reaming foods because of the arcuate blades spaced in equiangular positions in a circle to therefore secure an excellent balance feeling and the serrate knife teeth thereof.  
         [0010]     For more detailed information regarding advantages or features of the present invention, at least an example of preferred embodiment will be described below with reference to the annexed drawings. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0011]     The related drawings in connection with the detailed description of the present invention to be made later are described briefly as follows, in which:  
         [0012]      FIG. 1  is a perspective view of a juicer cutter constructed in accordance with the present invention;  
         [0013]      FIG. 2A  is a top plane view of the juicer cutter of the present invention;  
         [0014]      FIG. 2B  is a side elevational view of the juicer cutter of the present invention;  
         [0015]      FIG. 3A  is a plane view of a first blade of the juicer cutter of the present invention;  
         [0016]      FIG. 3B  is a plane view of a second blade of the juicer cutter of the present invention; and  
         [0017]      FIG. 3C  is a plane view of a third blade of the juicer cutter of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0018]     As shown in  FIGS. 1, 2A , and  2 B, a cutter  10  of juicer in accordance with the present invention comprises a head portion  103  fixed to a top end of a central shaft  101 , in which an external thread  1011  is formed on a bottom end of the central shaft  101 . A first blade  105 , a second blade  107 , and a third blade  109  that are shaped identically are fixed peripherally to the head portion  103  at different positions, namely, the first blade  105  at the lowest position, the second blade  107  at the second lowest, and the third blade  109  at the highest, so that the knife points of those three blades  105 ,  107 ,  109  move in an approximate helical locus. The blades  105 ,  107 ,  109  all are arc-shaped and provided at a convex side with a serrate knife-edge  1051 ,  1071 ,  1091 , respectively. The external thread  1011  of the central shaft  101  is engageable with a motor of the juicer (not shown) for driving the blades  105 ,  107 ,  109 .  
         [0019]     When the juicer cutter of the present invention rotates, the blades  105 ,  107 ,  109  turn the food in a food container of the juicer over and over and crush the food effectively under assistance of the helical locus and the serrate knife-points of the moving blades to thereby save time and raise working efficiency significantly.  
         [0020]      FIGS. 3A-3C  show the structures of the blades  105 ,  107 ,  109 . In the arc-shaped first blade  105 , there is a central hole  1052  formed at one end of the blade  105 , in which a plurality of protruding blocks  1053  is arranged on the inner circumference of the central hole  1052 ; a relatively small hole  1054  is formed in a specified protruding block  1053 ; a convex arcuate side of the first blade is provided with a plurality of serrate knife-teeth; and an included angle of 86.48° is contained between the back and the tail end of the blade ( 105 ).  
         [0021]     The second blade  107  is also arc-shaped and is generally identical to the first blade  105 . The second blade  107  has a central hole  1072  formed at one end thereof, a plurality of protruding blocks  1073  arranged on an inner circumference of the central hole  1072 , a relatively small hole  1074  formed in a specified protruding block  1073 , a plurality of serrate knife-teeth formed on a convex arcuate side thereof, and an included angle of 120.06° contained between the back and the tail end thereof.  
         [0022]     The third blade  109  is also arc-shaped and is generally identical to the first and second blades  105 ,  107 . The third blade  109  has a central hole  1092  formed at one end thereof, a plurality of protruding blocks  1093  arranged on an inner circumference of the central hole  1092 , a relatively small hole  1094  formed in a specified protruding block  1093 , a plurality of serrate knife-teeth formed on a convex arcuate side thereof, and an included angle of 140.06° contained between the back and the tail end thereof.  
         [0023]     The first, second, third blades  105 ,  107 ,  109  and the central shaft  101  are assembled by spacing three pieces of positioning pins in equiangular positions (120°) uniformly in molds for forming the head portion  103 , then setting the first, second, and third blades  105 ,  107 ,  109  into the molds in the manner that the small holes  1054 ,  1074 ,  1094  in the respective blades  105 ,  107 ,  109  are penetrated through and positioned by those three positioning pins, then putting the top end of the central shaft  101  in the molds too, and injecting with a plastic material to form the head portion  103  and meanwhile, allowing the material to enter the space among the protruding blocks  1053 ,  1073 ,  1093  in the central holes  1052 ,  1072 ,  1092  of the blades  105 ,  107 ,  109  to combine them together, also with the central shaft  101 , to complete the assembly of the juicer cutter  10  of the present invention.  
         [0024]     In the above described, at least one preferred embodiment has been described in detail with reference to the drawings annexed, and it is apparent that numerous changes or modifications may be made without departing from the true sprit and scope thereof, as set forth in the claims below.