Baby-walker with an extension stand

作者: Yu-Mean Liu

DOI:

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摘要: A baby-walker including a top table, an annular base frame having plurality of downwardly disposed bottom coupling holes around the border, wheel assemblies and extension stand respectively coupled to downward by respective anchoring socket bolt, linkage between table frame, being moved operative position in which is supported on ground allowed be turned about stand, are suspending above lowest end said non-operative from elevation assemblies.

参考文章(6)
Rogers Frederick, Kenneth H Pond, Rolling stool having means to lock it against rolling ,(1951)
Stephen Hu, Brake of a baby's walker ,(1995)
Chin-Pin Hung, Movable base for a baby walker ,(1994)
Robert G Mohr, Craftwork bench floor lock ,(1958)
Jr Harry I Clark, Holding device for wheeled vehicles ,(1956)