Wire lock liner
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United States of America Patent
Stats
-
Nov 24, 1987
Issued Date -
N/A
app pub date -
Jul 22, 1986
filing date -
May 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-part drill bushing assembly makes use of a sleeve, identified in the trade as a lock liner bushing which is embedded in a jig plate for reception of a separate slip renewable bushing element. Extending through the renewable bushing element is an axial bore within which a drill bit rotates during operation on a workpiece. On the exterior of the renewable bushing element is a helical shoulder which, when rotated, interlocks with a locking shoulder of the liner bushing. The invention involves a stiff wire rod, a mid-portion of which is bent to form the locking shoulder and from which legs extend to positions of snapped-on attachment to the liner bushing.
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