Extension ring
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United States of America Patent
Stats
-
Dec 4, 1990
Grant Date -
N/A
app pub date -
Mar 21, 1990
filing date -
Mar 21, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An extension ring has four panels for extending a height dimension of a box having lids hinged to the rim of the box. The lids of the box are removed, and two of the extension ring panels are secured to the rim of the box through engagement with the hinge elements of the box. The other two panels are assembled to the panels secured to the rim of the box to form the extension ring by forming pinned joints at the four corners of the extension ring. Once the extension ring is assembled and connected to the box, the lids are hinged to the top of the extension ring so that they function in the same way as when they were hinged to the box.
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Family
International Classification(s)
Cited Art Landscape
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