(under subclass 99) Implement provided with tool-blocking means permanently attached to the implement and aligned with the axis of the enclosure in position to block relative movement between the tool and the member when the tool is in the enclosed position; said tool-blocking means being movable from said aligned position to permit relative movement between said member and tool.
SEE OR SEARCH THIS CLASS, SUBCLASS:
115, for an implement including a chuck which is adapted to hold the tool in projected position, which chuck has jaws which lie in the path of the tool in its retracted position.
