US PATENT SUBCLASS 73 / 333
.~.~.~.~ Safety feature

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


73 /   HD   MEASURING AND TESTING

290 R  DF  LIQUID LEVEL OR DEPTH GAUGE {13}
323  DF  .~ Sight glass {5}
328  DF  .~.~ Boiler type {3}
332  DF  .~.~.~ With valve {1}
333.~.~.~.~ Safety feature

DEFINITION

Classification: 73/333

(under subclass 332) Boiler type glasses having provision for automatically closing the valves to isolate the transparent section when breakage occurs.

SEE OR SEARCH CLASS

137, Fluid Handling,

329.1, and 329.2+ for automatic gauge valves, per se, and subclasses 455+ for valves which are responsive to change in line condition.