US PATENT SUBCLASS 73 / 1.21
.~.~.~ With plural pistons

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.16  DF  .~ Volume of flow, speed of flow, volume rate of flow, or mass rate of flow {12}
1.19  DF  .~.~ Piston {3}
1.21.~.~.~ With plural pistons

DEFINITION

Classification: 73/1.21

With plural pistons:

(under subclass 1.19) Subject matter wherein the movement of more than one piston in a cylinder is utilized for introducing a known flow volume.