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US 6,293,512 B1Granted
Collapsible support frame
OwnerChing-Mo Hoinventor
Life of this patent
Estimating the term…
Abstract
A collapsible support frame is formed of an inner tube, an outer tube, and a plurality of support legs. The support legs are fastened to the inner tube and the outer tube. The inner tube is rotatably fitted into the outer tube. The folding and the unfolding of the support legs are attained by turning the inner tube an angle. The inner tube has a hollow interior for holding a Christmas tree, a flag pole, and the like.
Claims1
A collapsible support frame, comprising:
- an outer tube having a through hole formed in a wall thereof, and in a region of a bottom end of the wall;
- an inner tube rotatably fitted into said outer tube, said inner tube having a stop portion formed at a top end of an outer wall thereof, said inner tube having a groove and a retaining slot extending from one end of the groove, the groove and the retaining slot being provided in a region of a bottom end of said inner tube;
- and
- a plurality of support legs fastened respectively with said outer tube and said inner tube, one of said support legs having a leg rod that extends through the through hole in said outer tube and into the groove of said inner tube, said support legs being unfolded by turning said inner tube relative to said outer tube such that said leg rod slides to be located in the retaining slot, said support legs being folded by lifting and turning said inner tube relative to said outer tube to cause said leg rod to move from the retaining slot and slide back to another end of said groove.
1 more element
Dependencies are inferred from the claim text.