Ingersoll-rand Company

Ernst Lennart Lindstedt

Ronald F Bukovitz

Two pivots are provided on a drill tower support. The drill tower is supported on and positively locked to the upper pivot in the horizontal position. The drill tower can be pivoted about the first pivot from the horizontal position to the vertical position and positively locked to the lower pivot. The drill tower is then disconnected from the first pivot and thereafter it can be pivoted about the second pivot for angle drilling.

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Clarksburg, WV, United States of America

Ernst Lennart Lindstedt