US PATENT SUBCLASS 29 / 435
.~.~.~ Between tube-forming helical coils


Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
428  DF  .~ Assembling or joining {21}
434  DF  .~.~ Retaining clearance for motion between assembled parts {3}
435.~.~.~ Between tube-forming helical coils


DEFINITION

Classification: 29/435

Between tube-forming helical coils:

(under subclass 434) Process including shaping or assembling two or more elongated members into spiral intercoiled convolutions to form a wall of a tube, which members slide relative to one another to permit bending of the tube along its axis while maintaining substantially constant diameters.

SEE OR SEARCH THIS CLASS, SUBCLASS:

456, for a process including fabricating and assembling, or merely assembling a spirally convoluted member to a second member.

SEE OR SEARCH CLASS

267, Spring Devices,

285+, for a vehicle spring comprised of plural coils.