US PATENT SUBCLASS 15 / 407
.~.~.~.~ Work operated valve

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

Internet Version by PATENTEC © 1999      Terms of Use


15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

3  DF  MACHINES {11}
300.1  DF  .~ With air blast or suction {26}
405  DF  .~.~ Air blast only {1}
406  DF  .~.~.~ For hollow work, internal cleaning, e.g., tube soot-blowers {2}
407.~.~.~.~ Work operated valve

DEFINITION

Classification: 15/407

(under subclass 406) Apparatus wherein the air blast is controlled by a valve unseated by the pressure of the device against the work.