Apparatus for making a drilled hole with an undercut
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United States of America Patent
Stats
-
Jul 7, 1992
Grant Date -
N/A
app pub date -
Oct 29, 1991
filing date -
Nov 8, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The device for making a drilled hole with an undercut consists of a drilling machine and connected rotatable drilling tool, a supporting stand for the drilling machine having a holding device with a bearing bush secured in it, and a sleeve fixedly joined to the drilling machine. The sleeve is rotatably mounted in the bearing bush. A lever (35) is attached to the drilling machine (12), a cam plate (39,49) having a circumferential surface (40,60) is attached to the supporting stand (3) and a crank are provided for the lever. An end of the lever (35) remote from the drilling machine (12) is connected with the crank so that the lever can be pivoted and the drilling machine with the drilling tool swung out. The crank has at least one peg engagable on the circumferential face of the cam plate, the circumferentil face acting as a stop for the lever so that the lever can be rotated when the peg engages on the circumferential surface so that the end of the lever remote from the drilling machine describes a circle about a center line of the lever in a neutral position of the lever.
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