Wear pack for a demolition tool

Abstract

A wear pack is disclosed for shielding a front end of a jaw set of a demolition tool. The wear pack may have a position portion provided on a bracket member for the alignment thereof prior to mounting. The wear pack may have a force transfer portion provided on the bracket member for the transfer of demolition forces to the front end of the jaw. The positioning portion may be contiguous with the force transfer portion.

1 . A wear pack for a jaw of a demolition tool, the wear pack comprising:
 a wear member for shielding a front end of the jaw, the wear member having a contact surface to rest against the front end; and   a bracket member projecting from the wear member for coupling the front end and having a mounting surface configured for mating to a reciprocal mounting surface on the front end,   wherein the mounting surface comprises a positioning portion contiguous with the force transfer portion.   
     
     
         2 . The wear pack according to  claim 1  wherein the force transfer portion precedes the positioning portion with reference to contact surface. 
     
     
         3 . The wear pack according to  claim 2  wherein an angle of the reciprocal inclination between the position potion and force transfer portion relative to the contact surface is between 0° to 85° or 95° to 180°. 
     
     
         4 . The wear pack according to  claim 3  wherein the force transfer portion and the positioning portion have cross sections defined by circular arcs. 
     
     
         5 . The wear pack according to  claim 4  wherein the arc length of the force transfer portion is greater than the arc length of the positioning portion. 
     
     
         6 . The wear pack according to  claim 5  wherein the positioning portion is a convex ridge and the force transfer portion is a concave groove. 
     
     
         7 . The wear pack according to  claim 6  wherein an axis extending along the force transfer portion is parallel to an axis extending along the positioning portion. 
     
     
         8 . The wear pack according to  claim 7  further comprising an abutment member projecting from the wear member wherein the abutment member cooperates with the bracket member as a receiving pair to interposingly receive a section of the front end. 
     
     
         9 . The wear pack according to  claim 8  wherein the abutment member and the bracket member are mutually opposed on the wear member 
     
     
         10 . The wear pack according to  claim 9  further comprising a second bracket member and a second abutment member cooperating as a second receiving pair and being spaced from the first receiving pair. 
     
     
         11 . The wear pack according to  claim 10  further comprising mutually opposed side plates wherein each side plate is connected to the first and second receiving pair. 
     
     
         12 . A method of assembling a wear pack on a jaw of a demolition tool, the method comprising the steps of:
 providing a wear member for shielding the front end of the jaw, the wear member having a contact surface to rest against the front end;   providing a bracket member projecting from the wear member and having a mounting surface configured for mating a reciprocal mounting surface on the front end, the mounting surface having a positioning portion contiguous with a force transfer portion; and   engaging the positioning portion to a reciprocal positioning portion on the reciprocal mounting surface.   
     
     
         13 . The method of  claim 12  further comprising the step of rotating the bracket member to the front end at the engagement point of the positioning portion and the reciprocal positioning portion wherein the positioning portion and the reciprocal positioning portion have complementary cross sections defined by circular arcs. 
     
     
         14 . The method of  claim 13  further comprising the step of abutting the abutment member against a limit surface on the front end. 
     
     
         15 . The method of  claim 14  wherein the step of abutting the abutment member against a limit surface comprises engaging the force transfer portion to a reciprocal force transfer portion the reciprocal mounting surface wherein the force transfer portion and the reciprocal force transfer portion may have complementary cross sections defined by circular arcs.