US PATENT SUBCLASS 49 / 47
.~.~ Drop-arm type

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

42  DF  PLURAL WINGS RADIATE FROM COMMON PIVOT; I.E., REVOLVING {3}
46  DF  .~ Successive position-type; e.g., turnstile {1}
47.~.~ Drop-arm type

DEFINITION

Classification: 49/47

(under subclass 46) Device in which the wings are mounted to project outwardly in passage barring position when they complete rearward travel and to move inwardly or downwardly as they complete forward travel, so as to occupy a lesser plan area.