Patent ID: 8590642

Claim:
A percussion hammer bit retention system comprising: a retainer; a hammer bit; and a custom chuck; wherein said retainer includes an inner surface having a plurality of tabs spaced about the circumference of a lower end of the inner surface, and an edge disposed on an upper end of the inner surface; wherein said custom chuck includes a ledge disposed on an outer surface, wherein said edge is in abutting communication with the ledge, said ledge further defines a plurality of spaced indexed slots, the number of indexed slots being at least equal to the number of tabs on the retainer such that the tabs can be aligned with the indexed slots; wherein said hammer bit defines a first elevated surface and a second elevated surface and a pathway therebetween, said first and second elevated surfaces extend circumferentially around said hammer bit, and wherein said first elevated surface having a plurality of spaced first slot openings, the number of first slot openings being at least equal to the number of tabs on the retainer such that the tabs can be aligned with the first slot openings, said second elevated surface includes a plurality of spaced second slot openings, the number of second slot openings being at least equal to the number of tabs on the retainer such that the tabs can be aligned with the second slot openings, wherein said first slot openings are not in vertical alignment with said second slot openings and, said indexed slots are not in vertical alignment with said second slot openings.