Multipurpose bench grinder with left and right grinder assemblies

Abstract

A multipurpose bench grinder ( 1 ) is disclosed that includes a body including a base ( 2 ) and a housing ( 3 ); a motor mounted in the body and having a driving shaft ( 6 ) extending out of both sides of the body; a right grinder assembly ( 4 ) including a first grind wheel ( 45 ) and a parallel second grind wheel ( 47 ) being separate from the first grind wheel ( 45 ) by a predetermined gap; and a left grinder assembly ( 7 ) including a third grind wheel ( 77 ). Each of the grind wheels ( 45, 47, 77 ) is operatively connected to the driving shaft ( 6 ) such that in response to activating the driving shaft ( 6 ) the first and the second grind wheels ( 45, 47 ) together are adapted to sharpen a knife or a sickle placed therebetween or the third grind wheel ( 77 ) is adapted to sharpen a pair of scissors.

1 . (canceled) 
   
   
       2 . A bench grinder ( 1 ) comprising:
 a body including a base ( 2 ) and a housing ( 3 ):   a motor mounted in the body and having a driving shaft ( 6 ) extending out of both sides of the body:   a right grinder assembly ( 4 ) including a first grind wheel ( 45 ) and a parallel second arind wheel ( 47 ) being separate from the first grind wheel ( 45 ) by a predetermined gap, wherein the first grind wheel ( 45 ) is hollow and includes a left cylinder ( 451 ) and a right circular recess ( 452 ), the second grind wheel ( 47 ) is hollow and includes a right cylinder ( 471 ) and a left circular recess ( 472 ), and the right grinder assembly ( 4 ) further comprises:   a hollow, cylindrical abutment member ( 43 ) including a right cylinder ( 431 ) and an annular groove ( 432 ) defined between the cylinder ( 431 ) and an outer surface of the abutment member ( 43 ) wherein the cylinder ( 431 ) is fastened in the cylinder ( 451 );   a first spring ( 44 ) anchored between the groove ( 432 ) and a bottom of the cylinder ( 451 );   a hollow, cylindrical member ( 49 ) including a staged, left cylinder ( 491 ) and a left annular groove ( 492 ) defined between the cylinder ( 491 ) and an outer surface of the cylindrical member ( 49 ) wherein an end of the cylinder ( 491 ) is fastened in the cylinder ( 451 );   a second spring ( 48 ) anchored between the groove ( 492 ) and a bottom of the cylinder ( 471 );   a ring ( 46 ) fastened between the recesses ( 452 ,  472 ) with a portion of the cylinder ( 491 ) proximate its end being fastened by the ring ( 46 );   a fastener ( 8 ) releasably secured to an end of the driving shaft ( 6 ) securely inserted Through the abutment member ( 43 ) and the cylindrical member ( 49 );   a lower case ( 42 ) releasably secured to the body; and   an upper case ( 41 ) releasably secured to the lower case ( 42 ) for housing the right grinder assembly ( 4 ), the upper case ( 41 ) including a curved top opening ( 412 ) being open to the first and the second grind wheels ( 45 ,  47 ); and   a left grinder assembly ( 7 ) including a third grind wheel ( 77 ).   wherein each of the grind wheels ( 45 ,  47 ,  77 ) is operatively connected to the driving shaft ( 6 ) such that in response to activating the driving shaft ( 6 ) the first and the second grind wheels ( 45 ,  47 ) together are adapted to sharpen a knife or a sickle olaced therebetween or the third grind wheel ( 77 ) is adanted to sharpen a pair of scissors.   
   
   
       3 . A bench grinder ( 1 ) comprising:
 a body including a base ( 2 ) and a housing ( 3 )   a motor mounted in the body and having a driving shaft ( 6 ) extending out of both sides of the body:   a right grinder assembly ( 4 ) including a first grind wheel ( 45 ) and a parallel second grind wheel ( 47 ) being separate from the first grind wheel ( 45 ) by a predetermined gap; and   a left grinder assembly ( 7 ) including a third grind wheel ( 77 ), wherein the third grind wheel ( 77 ) is hollow arid includes a right cylinder ( 771 ) and a left circular recess ( 772 ), and the left grinder assembly ( 7 ) further comprises:   a cylindrical abutment member ( 73 ) including a right cylinder ( 731 ) and an annular groove ( 732 ) defined between the cylinder ( 731 ) and an outer surface of the abutment member ( 73 );   a stagedshell ( 75 ) including a left cylinder ( 751 ), a right circular recess ( 752 ), and an annular trough ( 754 ) on an outer surface of the recess ( 752 ) wherein the cylinder ( 731 ) is fastened in the cylinder ( 751 );   a third spring ( 74 ) anchored between the groove ( 732 ) and a bottom of the cylinder ( 751 );   a ring ( 76 ) fastened between the recesses ( 772 ,  752 ) with a portion of the cylinder ( 791 ) proximate its end being fastened by the ring ( 76 );   a hollow frusto-conical member ( 761 ) securely put on the trough ( 754 ) and being proximate the third grind wheel ( 77 ):   a hollow, cylindrical member ( 79 ) including a staged, left cylinder ( 791 ) and a left annular groove ( 792 ) defined between the cylinder ( 791 ) and an outer surface of the cylindrical member ( 79 ) wherein an end of the cylinder ( 791 ) is fastened in the cylinder ( 751 ) and the cylinder ( 791 ) is fastened in the third grind wheel ( 77 );   a fourth spring ( 78 ) anchored between the groove ( 792 ) and a bottom of the cylinder ( 771 );   a fastener ( 8 ) releasably secured to an end of the driving shaft ( 6 ) securely Inserted through the abutment member ( 73 ) and the cylindrical member ( 79 );   a lower case ( 72 ) releasably secured to the body; and   an upper case ( 71 ) releasably secured to the lower case ( 72 ) for housing the left grinder assembly ( 7 ), the upper case ( 71 ) including a curved top opening ( 712 ) being open to the third grind wheel ( 7 );   wherein each of the grind wheels ( 45 ,  47 ,  77 ) is operatively connected to the driving shaft ( 6 ) such that in response to activating the driving shaft ( 6 ) the first and the second grind wheels ( 45 ,  47 ) together are adapted to sharpen a knife or a sickle placed therebetween or the third grind wheel ( 77 ) is adapted to sharpen a pair of scissors.