US PATENT SUBCLASS 175 / 4.55
.~ Independent firing of plural charges


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}
4.55.~ Independent firing of plural charges


DEFINITION

Classification: 175/4.55

(under subclass 2) Subject matter directed to means including plural charges and a control to separately fire the charges.

(1) Note. Charges which are consecutively or train fired due to the single actuation of a control means are not included under this definition unless the firing can be interrupted so as to control the firing of one charge separately from another, such train firing being classified on other features.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4.5, for subject matter directed to separately controlled firing in which successive projectiles or charges are directed in the same path.