(under subclass 206) Devices comprising a combination of a friction means and an element that forces the outwardly movable means into contact with the surrounding conduit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
138+, for devices comprising a friction drag, a wedge or cam moved expansible anchor means and a packer or plug.
210, for anchors set at any point by drop only and also set by a turning movement, the setting means comprising a wedge or cam and also a friction drag.
