Surgery – Truss – Pad
Patent
1985-09-30
1989-12-05
Davis, Jr., Albert W.
Surgery
Truss
Pad
1283051, 408206, 408225, A61B 1716
Patent
active
048845710
ABSTRACT:
A new drill-type cranial perforator is disclosed of the type which comprises a front drill head assembly made up of a leading inner drill and a trailing outer drill, and a rear support and drive assembly adapted to enable both drills so long as the leading inner drill is encountering a resistive surface and to disable both drills when the leading inner drill stops encountering the resistive surface.
The leading inner drill has at least one drilling flute with a forward cutting edge including a reentrant cutting segment axially rearward from the outer end of the forward cutting edge and extending inwardly towards the longitudinal axis of the perforator.
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Davis Jr. Albert W.
Ford John K.
Intech, Inc.
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