초록 ▼

A holder having a baseplate with a tang extending rearwardly therefrom, a plurality of openings for receiving fasteners and a plurality of legs extending from the baseplate, the tang being heat treated or work hardened to harden the tang and facilitate its detachment for non-friable substrate applic

A holder having a baseplate with a tang extending rearwardly therefrom, a plurality of openings for receiving fasteners and a plurality of legs extending from the baseplate, the tang being heat treated or work hardened to harden the tang and facilitate its detachment for non-friable substrate applications. Work hardening may be accomplished, for example, by heating and quenching the tang to increase both its hardness and its brittleness to a level that allows the tang to be broken off with an impact force but not when inserted into a friable substrate so that the holder retains greater functionality.

대표청구항 ▼

1. A method for hardening a tang protruding from a rear surface of a holder, said holder comprising a thin metal baseplate having a plurality of openings for receiving a plurality of fasteners, said holder further comprising a generally symmetrical pair of legs, said method comprising: heating said

1. A method for hardening a tang protruding from a rear surface of a holder, said holder comprising a thin metal baseplate having a plurality of openings for receiving a plurality of fasteners, said holder further comprising a generally symmetrical pair of legs, said method comprising: heating said tang; andquenching said tang; said method resulting in said tang having a Rockwell B hardness of between about 80 and about 110 proximate said baseplate. 2. A method for hardening a tang according to claim 1, said method comprising: forming said tang from the metal of said baseplate. 3. A method for hardening a tang according to claim 2, wherein said baseplate and said tang are made from 1010 steel. 4. A method for hardening a tang according to claim 1, wherein said tang is heated to between about 1500° F. and about 1800° F. for between about 3 seconds and about 6 seconds. 5. A method for hardening a tang according to claim 1, wherein said heating is provided by a welder. 6. A method for hardening a tang according to claim 1, wherein said heating is provided by an induction hardener. 7. A method for hardening a tang according to claim 1, wherein said heating is substantially limited to an area including and proximate said tang. 8. A method for hardening a tang according to claim 1, wherein said tang is quenched in water or oil. 9. A method for hardening a tang according to claim 1, said method resulting in said tang having a Rockwell B hardness of between about 90 and about 100 proximate said baseplate.