US PATENT SUBCLASS 267 / 180
.~ Irregular

Current as of: June, 1999
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267 /   HD   SPRING DEVICES

166  DF  COIL {6}
180.~ Irregular

DEFINITION

Classification: 267/180

(under subclass 166) Spring device in which the spring element is of one-piece construction and (a) includes plural, intervoluted coils; or (b) is out-of-round in cross-section; or (c) in the unstressed condition thereof, includes portions which vary, one from another in (1) helix angle, or (2) distance from a common, central, longitudinal axis, or (3) cross-section.