US PATENT SUBCLASS 285 / 123.8
.~.~.~.~.~.~ By bolt directly connecting slip means to packing 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  DF  .~.~.~ Having inner tube anchored by slip means {2}
123.6  DF  .~.~.~.~ Including packing means {2}
123.7  DF  .~.~.~.~.~ Having means engaging slip means and compressing packing means {1}
123.8.~.~.~.~.~.~ By bolt directly connecting slip means to packing means

DEFINITION

Classification: 285/123.8

By bolt directly connecting slip means to packing means:

(under subclass 123.7) Subject matter in which the member and the sealing device are held together by a headed, threaded fastener.