Abrasive preparation device with an improved abrasion element assembly

An abrasive element assembly comprising:

• a substrate layer having a distal front section having abrasive particles brazed with brazing material thereon;
• a backing element being affixed against and providing flex support and reinforcement for said substrate layer;
• a supporting bracket affixed to the backing element;
• said supporting bracket constructed for being mountable to a movable housing of a power abrading device;
• and
• said mounting bracket having an upper section for mounting to said housing and an inclined depending section for mounting said backing plate and said substrate at an angle from a perpendicular.

An abrasive element assembly comprising:

• a mounting bracket having a mounting leg for mounting to a housing and a depending leg;
• a substrate layer having a distal front section having abrasive particles brazed with a brazing material thereon;
• said brazed material forming a bond layer between the abrasive particles and the substrate layer;
• and
• said substrate having its rear surface in abutting relation with said depending leg and affixed thereto.

An abrasive hard surface preparation device comprising:

• a housing for moving over a work surface;
• said housing having a plurality of downwardly extending abrasive elements having a major forward facing respective abrasive face with a width and length;
• said abrasive elements each having a substrate layer and an abrasive material secured to a major front surface of said substrate layer;
• said abrasive elements having a substantially uniform thickness;
• said substrate layer being connected to the housing such that the major forward facing abrasive face generally faces toward the normal direction of motion of said housing;
• and
• said substrate having a thickness substantially smaller than said with and length of said abrasive face and constructed to allow a wear rate of said abrasive element to correspond to the wear rate of said abrasive elements such that said abrasive elements are sacrificed to expose other abrasive particles as said substrate wears down before said abrasive particles become worn to the part of being ineffective to a predetermined amount.

An abrasive hard surface preparation device comprising:

• a housing for moving over a work surface;
• said housing having a plurality of downwardly extending abrasive elements having a major forward facing respective abrasive face with a width and length;
• said abrasive elements each having a substrate layer and an abrasive material secured to a major front surface of said substrate layer;
• said abrasive elements having a substantially uniform thickness;
• said substrate layer being connected to the housing such that the major forward facing abrasive face generally faces toward the normal direction of motion of said housing;
• said substrate having a thickness substantially smaller than said width and length of said abrasive face and constructed to allow a wear rate of said abrasive element to correspond to the wear rate of said abrasive elements such that said abrasive elements are sacrificed to expose other abrasive particles as said substrate wears down before said abrasive particles become worn to the part of being ineffective to a predetermined amount;
• and
• said substrate layer being made from a low carbon steel.