Rock claw for demolition hammer

Abstract

A rock claw for attaching to a corner of a demolition hammer, the rock claw including a first wall having a first inner side surface, a second wall having a second inner side surface joined to the first inner side surface along a first intersection, and a third wall having a third inner side surface. The third inner side surface is joined to the first inner side surface along a second intersection and the third inner side surface is joined to the second inner side surface along a third intersection.

What is claimed is: 
     
       1. A rock claw for attaching to a corner of a demolition hammer, the rock claw comprising:
 a first wall having a first inner side surface; 
 a second wall having a second inner side surface joined to the first inner side surface along a first intersection; and 
 a third wall having a third inner side surface, the third inner side surface joined to the first inner side surface along a second intersection and the third inner side surface joined to the second inner side surface along a third intersection; 
 wherein the first wall has a height that is larger adjacent the first intersection than at a location that is more distal from the first intersection. 
 
     
     
       2. The rock claw of  claim 1 , wherein the first intersection, the second intersection, and the third intersection meet at a point. 
     
     
       3. The rock claw of  claim 1 , wherein the third inner side surface is perpendicular to at least one of the first inner side surface and the second inner side surface. 
     
     
       4. The rock claw of  claim 1 , wherein each of the first inner side surface, the second inner side surface, and the third inner side surface is perpendicular to the other two inner side surfaces. 
     
     
       5. The rock claw of  claim 1 , wherein the first wall has a first end portion adjacent both the first intersection and the second intersection, and a second end portion opposite the first end portion, wherein the first end portion has a first thickness and the second end portion has a second thickness that is less than the first thickness. 
     
     
       6. The rock claw of  claim 5 , wherein a ratio of the first thickness to the second thickness is in the range of 2.5 to 4.5. 
     
     
       7. The rock claw of  claim 1 , wherein the third inner side surface is triangular. 
     
     
       8. The rock claw of  claim 1 , wherein the rock claw is symmetric along an axis defined by the first intersection. 
     
     
       9. The rock claw of  claim 1 , wherein the third wall has a first thickness adjacent the first wall, a second thickness adjacent the second wall, and a third thickness intermediate the first wall and second wall, and wherein the third thickness is less than at least one of the first thickness and the second thickness. 
     
     
       10. The rock claw of  claim 1 , wherein the first inner side surface includes a semicircular recess adjacent the third inner side surface. 
     
     
       11. A demolition hammer, comprising: 
 a housing having first side wall, a second side wall, and a bottom wall, wherein an intersection of the first side wall, the second side wall, and the bottom wall define a corner; 
 a power cell positioned within the housing; 
 a tool disposed in the power cell and projecting from the housing through an opening in the bottom wall; and  
 a rock claw attached to an external surface of the housing, the rock claw comprising:
 a first wall; 
 a second wall joined to the first wall; and  
 a third wall joined to both the first wall and the second wall;,  
 
 wherein the first wall of the rock claw covers a portion of the first side wall of the housing, the second wall of the rock claw covers a portion of the second side wall of the housing, and the third wall cover of the rock claw covers a portion of the bottom wall of the housing, and 
 wherein the housing first side wall of the housing has a height and the first wall of the rock claw extends further along the height of the first side wall of the housing at a location adjacent the second side wall of the housing than at a location on the first side wall of the housing that is more distal from the second side wall of the housing. 
 
     
     
       12. The demolition hammer of  claim 11 , wherein the first side wall has a width and the first wall of the rock claw extends along less than half of the width of the first side wall. 
     
     
       13. The demolition hammer of  claim 11 , further comprising:
 a third side wall, wherein an intersection of the second side wall, the third side wall, and the bottom wall define a second corner; 
 a second rock claw attached to an external surface of the housing, the second rock claw comprising:
 a first wall 
 a second wall joined to the first wall; 
 a third wall joined to both the first wall and the second wall; 
 
 wherein the first wall of the second rock claw covers a portion of the second side wall, the second wall of the second rock claw covers a portion of the third side wall, and the third wall of the second rock claw cover a portion of the bottom wall. 
 
     
     
       14. The demolition hammer of  claim 13 , wherein the second rock claw is interchangeable with the rock claw. 
     
     
       15. The demolition hammer of  claim 13 , wherein the rock claw is spaced apart from the second rock claw. 
     
     
       16. The demolition hammer of  claim 13 , further comprising
 a fourth side wall, wherein an intersection of the third side wall, the fourth side wall, and the bottom wall define a third corner and an intersection of the fourth side wall, the first side wall, and the bottom wall define a fourth corner; 
 a third rock claw attached to an external surface of the housing, the third rock claw comprising:
 a first wall 
 a second wall joined to the first wall; 
 a third wall joined to both the first wall and the second wall; 
 
 wherein the first wall of the third rock claw covers a portion of the third side wall, the second wall of the third rock claw covers a portion of the fourth side wall, and the third wall of the third rock claw cover a portion of the bottom wall; and 
 a fourth rock claw attached to an external surface of the housing, the fourth rock claw comprising:
 a first wall 
 a second wall joined to the first wall; 
 a third wall joined to both the first wall and the second wall; 
 
 wherein the first wall of the fourth rock claw covers a portion of the fourth side wall, the second wall of the fourth rock claw covers a portion of the first side wall, and the third wall of the fourth rock claw cover a portion of the bottom wall. 
 
     
     
       17. The demolition hammer of  claim 13 , wherein the first wall of the second rock claw has a first end portion adjacent the third wall and a second end portion opposite the first end portion, wherein the first end portion has a first thickness and the second end portion has a second thickness that is less than the first thickness. 
     
     
       18. A rock claw for attaching to a corner of a demolition hammer, the rock claw comprising:
 a first wall having a first inner side surface; 
 a second wall having a second inner side surface joined to the first inner side surface along a first intersection; and 
 a third wall having a third inner side surface, the third inner side surface joined to the first inner side surface along a second intersection and the third inner side surface joined to the second inner side surface along a third intersection, 
 wherein the rock claw is symmetric along an axis defined by the first intersection. 
 
     
     
       19. The rock claw of  claim 18 , wherein the third inner side surface is triangular. 
     
     
       20. The rock claw of claim 1,
 wherein the first and second inner side surfaces have respective heights from and respective widths along the second intersection and the third intersection,   wherein the height of each of the first and second inner side surfaces is maximum adjacent the first intersection and the width of each of the first and second inner side surfaces is maximum adjacent the third wall, and   wherein the height of each of the first and second inner side surfaces decreases in a width direction of the first and second walls from the maximum height at the first intersection away from the first intersection.    
     
     
       21. The rock claw of claim 1, wherein for each of the first wall and the second wall a first end is at the first intersection and a second end is a free end that is opposite the first end and the first intersection.  
     
     
       22. The rock claw of claim 1,
 wherein the first wall is for covering a portion of a first side wall of a housing of a demolition hammer, the second wall is for covering a portion of a second side wall of the housing of the demolition hammer, and the third wall is for covering a portion of an end wall of the housing of the demolition hammer, and   wherein respective shapes of the first and second walls of the rock claw are configured such that the rock claw is for extending further along a height of the first and second side walls of the housing of the demolition hammer at the first intersection then at a location more central to each of the first and second side walls of the housing of the demolition hammer.    
     
     
       23. The demolition hammer of claim 11,
 wherein the first wall of the rock claw has a first inner side surface,   wherein the second wall of the rock claw has a second inner side surface joined to the first inner side surface of the first wall along a first intersection,   wherein the third wall of the rock claw has a third inner side surface joined to the first inner side surface of the first wall along a second intersection and the second inner side surface of the second wall along a third intersection,   wherein the first and second inner side surfaces have respective heights from and respective widths along the second intersection and the third intersection,   wherein the height is maximum adjacent the second wall and the width is maximum adjacent the third wall,   wherein the height of each of the first and second inner side surfaces is maximum adjacent the first intersection and the width of each of the first and second inner side surfaces is maximum adjacent the third wall, and   wherein shapes of the first and second walls of the rock claw are configured such that the rock claw extends further along a height of the first and second side walls of the housing of the demolition hammer at the first intersection than at a location more central to each of the first and second side walls of the housing of the demolition hammer.    
     
     
       24. The demolition hammer of claim 11, wherein each of the first wall and the second wall of the rock claw has a free end opposite an intersection at which the second wall is joined to the first wall.  
     
     
       25. The rock claw of claim 18,
 wherein the first and second walls have a height and a width,   wherein the height is maximum adjacent the first intersection and the width is maximum adjacent the third wall, and   wherein the height decreases in a width direction of the first and second walls from the maximum height at the first intersection away from the first intersection.    
     
     
       26. The rock claw of claim 18, wherein each of the first wall and the second wall has a free edge opposite the first intersection.