US PATENT SUBCLASS 285 / 123.3
.~.~ Having single suspended inner tube

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.~.~ Having single suspended inner tube {3}
123.4  DF  .~.~.~> Split ring type suspension means
123.5  DF  .~.~.~> Having inner tube anchored by slip means {2}
123.12  DF  .~.~.~> Including a seal {2}

DEFINITION

Classification: 285/123.3

Having single suspended inner tube:

(under subclass 123.1) Subject matter in which the tubes are in a substantially vertical position and comprising means to hang the inner within the outer tube (e.g., well caps or headers).

SEE OR SEARCH CLASS

188, Brakes, particularly

67, for a brake mechanically connected to a relatively stationary structure and which holds a pipe or rod at various locations along the pipe's or rod's length for short, quick linear assembly or disassembly during a work or manufacturing operation, or preparatory to a working operation, done by the pipe, rod, or a pipe supported tool.

294, Handling: Hand and Hoist-Line Implements,

5.5, for rod-type supports and hangers.