US PATENT SUBCLASS 175 / 4.53
.~ Firing chamber movable in bore relative to carrier or another firing chamber

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

2  DF  BORING WITH EXPLOSION IN INACCESSIBLE HOLE {12}
4.53.~ Firing chamber movable in bore relative to carrier or another firing chamber

DEFINITION

Classification: 175/4.53

(under subclass 2) Subject matter directed to (1) a chamber for an explosive charge which is movable while it is in the hole relative to a body or frame which supports the chamber in the hole or (2) plural chambers which are connected together so as to permit relative movement between the chambers while they are in the hole.