Patent ID: 7950745

Claim:
In combination, a bit holder and bit block for use in road milling, trenching and mining equipment, said bit holder being mountable in a second bore through said bit block, said bit holder comprising: an annular front body portion and a generally cylindrical hollow shank portion extending from a rear of said annular front body portion, said annular front body portion extending axially outwardly of said bit block when said bit holder is mounted therein; said generally cylindrical hollow shank portion defining an annular side wall and including at least two arcuately spatially related elongate slots completely through said side wall extending generally axially along said side wall in like direction and having opposed terminations on said side wall axially inwardly of a distal end of said shank and said rear of said annular front body portion, an outer portion of said shank axially between said opposed slot terminations providing an interference with said second bore on a bit block when mounted therein for maintaining said bit holder in said bit block during use, and a widest boundary of said annular front body portion is greater diametrically than said shank portion.