US PATENT SUBCLASS 137 / 243.4
.~.~.~.~ With swivel-preventing means

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

Internet Version by PATENTEC © 1999      Terms of Use


137 /   HD   FLUID HANDLING

237  DF  WITH CLEANER, LUBRICATION ADDED TO FLUID OR LIQUID SEALING AT VALVE INTERFACE {2}
238  DF  .~ Cleaning or steam sterilizing {4}
242  DF  .~.~ Mechanical cleaning {2}
243  DF  .~.~.~ Valve grinding motion of valve on seat {6}
243.4.~.~.~.~ With swivel-preventing means

DEFINITION

Classification: 137/243.4

(under subclass 243) Devices in which a normally swiveled connection between the head and stem is blocked to cause the head to rotate on the seat as the stem rotates.