.~ Hammer head comprises plural parts or diverse materials {1}
127
.~.~ Piston of drive motor
DEFINITION
Classification: 173/127
(under subclass 126) Apparatus in which the hammer head comprises or is rigidly connected to a mass of material forming an element which is received in a chamber, said element having surface which is acted upon by motive material in the chamber to cause the element to move and deliver a blow.
SEE OR SEARCH CLASS
92, Expansible Chamber Devices,
172+, for the piston of an expansible chamber device which is formed of specific or diverse materials, and including a piston which may be recited as a hammer head.
