US PATENT SUBCLASS 169 / 38
.~ Collapsible strut

Current as of: June, 1999
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169 /   HD   FIRE EXTINGUISHERS

37  DF  SPRINKLER HEADS {4}
38.~ Collapsible strut {1}
39  DF  .~.~> Compound

DEFINITION

Classification: 169/38

(under subclass 37) The valve is supported by means of a strut or compression device arranged between the valve and a part of the frame, the strut being designed to fall or collapse upon an increase of its temperature. This includes struts consisting of a single or simple element which falls by fusion, combustion, or bursting.