Patent ID: 6886645

Claim:
A rotatable cutting bit head assembly comprising: a) a drill head body having an axially forward end, an axially rearward end, a button opening and a stepped annular chamber, said button opening in communication with said stepped annular chamber, said stepped annular chamber having an upstream portion, an annular surface portion connected to said upstream portion and downstream portion connected to said annular surface portion; b) an adaptor having an upper male section, a lower section, and an annular bore, said upper male section having a forward end wall, and a button opening in communication with said annular bore, said upper male section removably disposed within said drill head body annular chamber downstream portion, said adaptor button opening aligned with said drill head body button opening; c) a flexible bushing seal comprising a nipple, a collar attached to said nipple, a shank attached to said collar, and an annular chamber, said collar having a notch said collar removably disposed between said drill head body stepped chamber annular surface portion and said adaptor forward end wall; and d) a spring clip having an integral button, said spring clip attached to said adaptor upper male section and removably disposed within said flexible bushing collar notch, and said button moveably disposed within said drill bit head button opening and said adaptor button opening; wherein said bushing seal provides a fluid tight seal between said adaptor bore, said adaptor button opening, said drill head body chamber, said drill head body button opening and said integral button.