(under subclass 146) Implement wherein the force-applying means comprises a substantially rigid movable member in direct contact with the material*.
(1) Note. A patent within the definition of subclass 146 claiming a pump by name for moving the material will be placed in this or the indented subclass unless the disclosure clearly indicates that such moving means in contact with the material is liquid or gas in which case the patent will be placed in subclass 146.
