US PATENT SUBCLASS 48 / 28
.~.~.~.~ Pressure valves

Current as of: June, 1999
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48 /   HD   GAS: HEATING AND ILLUMINATING

*  DD  ACETYLENE {5}
*  DD  .~ Generators {5}
4  DF  .~.~ Water feed {15}
27  DF  .~.~.~ Percolating {1}
28.~.~.~.~ Pressure valves

DEFINITION

Classification: 48/28

Percolating water-feed generators having valves operated by the pressure of the gas in the generator to regulate the flow of water.