(under subclass 99) Implement including means to cause exposure of the tool, which means is actuated in response to the application of substantially axial force on the tool or on a portion of the implement immediately adjacent the tool.
SEE OR SEARCH THIS CLASS, SUBCLASS:
65+, for an implement including means to cause incremental advance of a solid-material tool in response to substantially axial pressure thereon.
272+, for an implement of the brush, broom or mop type wherein a flow-regulator* is actuated by pressure of the tool on a work surface; and see the search notes thereto.