Invention Grant
US4643621A Quick-change system for power feed and positive feed drill motors 失效
动力供给快速更换系统和正极钻机电动机

Quick-change system for power feed and positive feed drill motors
Abstract:
A quick-change system for power feed and positive feed drill motors having quick-change capabilities whereby a nosepiece may be separated from the drill motor employing a quick-release coupling that does not utilize threaded means. The quick-change system utilizes a quick-change nosepiece, chuck and shank adapter means such that the oil line to a fluid inducer remains attached during nosepiece removal.
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