US PATENT SUBCLASS 72 / 135
.~ To form helical coil or tube

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

127  DF  BY DEFLECTING SUCCESSIVELY-PRESENTED PORTIONS OF WORK DURING BODILY MOVEMENT THEREOF (E.G., FOR COILING, LEVELLING, CURVING OR TROUGHING MATERIAL IN MOVEMENT) {11}
135.~ To form helical coil or tube {7}
136  DF  .~.~> Including thinning of helical portion of work section
137  DF  .~.~> With deforming of work or product (other than by coiler)
138  DF  .~.~> By use of means acting by and during machine operation to form coil of irregular pitch and/or diameter {1}
140  DF  .~.~> By interchangeable or selectable tool portion
141  DF  .~.~> By multi-convolutional tool
142  DF  .~.~> By work-guide and rotatable, work-holding core {2}
145  DF  .~.~> By movable-periphery tool external of coil

DEFINITION

Classification: 72/135

To form helical coil or tube:

(under subclass 127) Subject matter wherein the instrumentality accomplishes, or is provided with additional means that accomplishes, a further diversion of the successively presented portions along the transversely disposed axis-of-bend*, thereby adding a helical pitch to the produced coil*.

(1) Note. It will be noted that the "transversely disposed axis-of-bend" is referred to in paragraph (a) of the definition of subclass 127.

(2) Note. The diversion of the work around the axis-of-bend, and the diversion along said axis can be accomplished by separate devices or by a single mechanism that combines the functions of both devices.

(3) Note. For illustrations of a tube and a coil, see the Figure accompanying (1) Note of subclass 49, and Figure III-3 (in the definition of axis-of-bend*), respectively.

SEE OR SEARCH THIS CLASS, SUBCLASS:

49, for the manufacture of a helically- seamed tube.

371, for a method of coiling not involving the use of any particular structure.

SEE OR SEARCH CLASS 428, Stock Material or Miscellaneous Articles,

592, for a metallic stock which is helical or has a helical component.