US PATENT SUBCLASS 166 / 238
.~ Flow permitting means bridging fluid conduit


Current as of: June, 1999
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166 /   HD   WELLS

237  DF  DETENTS OR CLUTCHES {3}
238.~ Flow permitting means bridging fluid conduit


DEFINITION

Classification: 166/238

(under subclass 237) Devices in which the movement prevention means extends completely across a well conduit but permits fluid to flow past the means, the means acting to control relative movement between the conduit and another part.

(1) Note. A separate movable part, such as a go-devil, between two detent means is not considered within the definition of this subclass. See other subclasses in this group for such devices.