US PATENT SUBCLASS 251 / 225
.~.~ Threads in removable sleeve

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
215  DF  .~ Plural motions of valve {5}
225.~.~ Threads in removable sleeve

DEFINITION

Classification: 251/225

(under subclass 215) Device in which one of the cooperating thread elements is formed within or upon a sleeve-like element which is detachable or removable from the valve body.

SEE OR SEARCH THIS CLASS, SUBCLASS:

221, for removable sleeves encased in the valve casing.

SEE OR SEARCH CLASS

137, Fluid Handling,

243.5, for actuators of this type having special provision for grinding the valve on its seat.