DefinitionThis class includes: A. Tubular members of definite or indefinite length including wall structure of the tubular members, the end structure of the tubular members of definite length, if not elsewhere classifiable. B. Fluid pressure compensators (e.g., accumulators or cushioning devices), flow regulators, or baffles not restricted by structure to use with any particular art. C. Devices for thawing frozen fluid in pipes, for preventing the fluid in the pipes from freezing and for preventing the pipe from bursting if the fluid freezes. D. Pipes with closures and plugs where tied with the structure of the pipe or limited by structure to use with a pipe. E. Methods and apparatus for repairing pipes where not elsewhere classifiable. |
Lines with other classes and within this classFor articles embracing a short length of a tube having some added feature which makes them into a shot shell, box, can or other article, the proper article class should be searched. This class (138) includes conveyor pipes comprising the mere tube. If the device is an open chute, is more than a mere pipe, or is otherwise limited to use as a conveyor, it is classified elsewhere. See References to Other Classes below for the conveyor classes. For tubular textile fabric for use in making hose, see Class 66, Textiles: Knitting, subclasses 169+; Class 87, Textiles: Braiding, Netting, and Lace Making, subclasses 6 and 9; Class 57, Textiles: Spinning, Twisting, and Twining, appropriate subclasses; and Class 139, Textiles: Weaving, subclasses 387+. For pipe joints and couplings, see Class 285, Pipe Joints or Couplings. The combination of pipe wall structure and a coupling is classified in Class 285. Methods of, and apparatus for, manufacturing tubes are not classifiable in this class but are found in the various manufacturing classes. See References to Other Classes below. |
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