Apparatus for making numerous holes in a tube
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United States of America Patent
Stats
-
Jul 3, 2001
Grant Date -
N/A
app pub date -
Aug 30, 1999
filing date -
Dec 16, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for making numerous spaced-apart, radial holes in a tube includes a rotary index table that rotates intermittently through predetermined index angles of rotation and dwells between each rotation. A mandrel affixed to the index table receives the tube telescopically and holds the tube in a fixed position relative to the mandrel. A pair of self-feed drilling units mounted on opposite sides of the mandrel have output shafts that are driven intermittently in reciprocating motion along axes lying in a common plane with the longitudinal axis of the tube, the axis of each output shaft being perpendicular to the longitudinal axis of the tube. Each output shaft carries a multiple-spindle head, and each spindle of the multiple-spindle head receives a drill bit.
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