(under the class definition) Apparatus combined with an above ground hammer to deliver, or cause to be delivered an impact or blow to an earth boring means.
(1) Note. For classification in this subclass the impact or blow must be delivered to a portion of the earth penetrating means and not directly to the earth formation. For example, an above ground hammer for delivering an impact or blow to an earth penetrating means is classified herein, but an earth penetrating means which is reciprocated to deliver a blow to the formation is excluded.
SEE OR SEARCH THIS CLASS, SUBCLASS:
189, and the search there noted for means to reciprocate an earth penetrating means.
293+, for a below ground hammer or impact device.
SEE OR SEARCH CLASS
7, Compound Tools, 143+, for hammers combined with other tools.
72, Metal Deforming,
429+, for a power hammer of the metal working type.
74, Machine Element or Mechanism, appropriate subclasses for mechanical motion converting means for operating a hammer.
81, Tools,
463+, for tools combined with impact delivering means and subclasses 20+, for hand operated hammers.
173, Tool Driving or Impacting,
90+, and see the search notes therein for an impacting device.
227, Elongated-Member-Driving Apparatus. See Class 175,
135,.
267, Spring Devices,
137, for a spring device for dampening the movement of an earth-boring impacting tool.
