Drill head assembly for cranial perforators

Details Drill head assembly for cranial perforators Drill head assembly for cranial perforators

1989-10-18

1991-04-16

Thaler, Michael H.

Surgery

Instruments

Orthopedic instrumentation

606173, 408139, 408224, A61B 1716

Patent

active

050079115

ABSTRACT:
A drill head assembly for drilling holes in bony structure is disclosed. The assembly has an inner drill and an outer drill which rotate together as a unit. The leading portions of the outer drill are contiguous with the peripheral portions of the inner drill, and the inner and outer drills are adapted to form a bore-countersink opening in the bone, whereby the drill head assembly may be used to safely drill through relatively thin bone.

REFERENCES:
patent: 158958 (1875-01-01), McCrosson
patent: 252704 (1882-01-01), Southwick
patent: 2525669 (1950-10-01), Hainault
patent: 2786373 (1957-03-01), Patton
patent: 4600006 (1986-07-01), Baker

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