US PATENT SUBCLASS 181 / 247
.~.~ Straight-through passage

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

Internet Version by PATENTEC © 1999      Terms of Use


181 /   HD   ACOUSTICS

175  DF  SOUND-MODIFYING MEANS {12}
212  DF  .~ Muffler, fluid conducting type {25}
247.~.~ Straight-through passage {4}
248  DF  .~.~.~> Continuous conduit {1}
252  DF  .~.~.~> With sound absorbing material
253  DF  .~.~.~> With muffler bypass {1}
255  DF  .~.~.~> Expansion chamber

DEFINITION

Classification: 181/247

Straight-through passage:

(under subclass 212) Subject matter wherein the fluid is conducted through a fluid conducting device having a linear, unobstructed passage at least the same size from the inlet to the outlet.