US PATENT SUBCLASS 160 / 139
.~.~.~ Unit collapsing only

Current as of: June, 1999
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160 /   HD   FLEXIBLE OR PORTABLE CLOSURE, PARTITION, OR PANEL

130  DF  PLURAL STRIP, SLAT, OR PANEL TYPE {11}
136  DF  .~ Parallelogram type {6}
138  DF  .~.~ With operator {1}
139.~.~.~ Unit collapsing only {6}
140  DF  .~.~.~.~> Diverse types of operators {2}
144  DF  .~.~.~.~> Spring {1}
146  DF  .~.~.~.~> Weight {2}
149  DF  .~.~.~.~> With gearing
150  DF  .~.~.~.~> With strand and pulley
151  DF  .~.~.~.~> Unit carried operator

DEFINITION

Classification: 160/139

(under subclass 138) Devices wherein the operator effects the collapsing of the device only and does not move the unit as a whole with respect to its support.

(1) Note. Since the majority of parallelogram type devices expand in one direction when they collapse in another, the term "collapse" has been used generically in referring to any motion about the parallelogram pivots.