US PATENT SUBCLASS 285 / 123.5
.~.~.~ Having inner tube anchored by slip means

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

120.1  DF  HAVING PLURAL INDEPENDENT PATHS {4}
123.1  DF  .~ For concentric tubes or pipes (e.g., well casing or wellhead type) {4}
123.3  DF  .~.~ Having single suspended inner tube {3}
123.5.~.~.~ Having inner tube anchored by slip means {2}
123.6  DF  .~.~.~.~> Including packing means {2}
123.11  DF  .~.~.~.~> Having slip means actuator

DEFINITION

Classification: 285/123.5

Having inner tube anchored by slip means:

(under subclass 123.3) Subject matter in which a member having a high degree of friction (e.g., an internally serrated member) grips the outside wall of the pipe to be held.