Patent Number: 6,254,318

Title: Apparatus for making numerous holes in a tube

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.

Inventors: Sica; Michael F. (Greenwich, CT)

Assignee:

International Classification: B23B 39/22 (20060101); B23B 39/00 (20060101); B23B 39/20 (20060101); B23B 039/22 ()

Expiration Date: 07/03/2018