Drill head assembly

Details Drill head assembly Drill head assembly

1991-12-23

1993-03-23

Yost, Frank T.

Tool driving or impacting

Work cleansing

173DIG3, 279156, E21C 702

Patent

active

051955989

ABSTRACT:
An improved rotary drill head assembly including a drill head cover having an upper portion, a rotatable drill retaining socket having an outer surface and a support member having an upper portion. The socket extends above the support member. A flinger attached to the upper portion of the support member and having an axial passage extending therethrough, a top cap having an axial passage extending therethrough. An arrangement for attaching the flinger to the top cap including a pin received by one of the flinger and the top cap. A top plate attached to the top cap. The top plate includes an arrangement to protect the pin from the outside environment and to hold the pin in place against axial movement. A sealing arrangement between the upper portion of the drill head cover and the flinger. The flinger, top cap, top plate and upper portion of the drill head cover may be coated with a ceramic material.

REFERENCES:
patent: 3766991 (1973-10-01), Brown
patent: 3779040 (1973-12-01), Garrett
patent: 3800887 (1974-04-01), West
patent: 3901330 (1975-08-01), Slator et al.
patent: 4190116 (1980-02-01), O'Neal et al.
patent: 4416337 (1983-11-01), Phillips et al.
patent: 4487271 (1984-12-01), Pomeroy et al.

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