US PATENT SUBCLASS 49 / 235
.~.~.~ By track roller-closure displacement

Current as of: June, 1999
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49 /   HD   MOVABLE OR REMOVABLE CLOSURES

208  DF  MOUNTED FOR MULTIDIRECTIONAL OR OBLIQUE MOVEMENT {7}
226  DF  .~ In plane of closure; e.g., oblique {4}
234  DF  .~.~ Closure actuated vertically to retard horizontal travel {1}
235.~.~.~ By track roller-closure displacement

DEFINITION

Classification: 49/235

(under subclass 234) Device wherein the closure is reciprocable on a track, and wherein track engaging roller means are provided for supporting the closure in its horizontal reciprocation movement, and wherein the antifriction means and closure are displaced relative to each other by the operator to free the closure for horizontal travel.

SEE OR SEARCH CLASS

16, Miscellaneous Hardware,

99, for means for releasing and elevating a closure or antifriction supporting frames.