Undertaking
Patent
1987-06-15
1988-07-26
Apley, Richard J.
Undertaking
280 8702W, 280649, A61H 300, A47D 1304
Patent
active
047595418
ABSTRACT:
The present invention relates to a baby's walker with height adjustment apparatus which includes a seat; a slidable base; two U-shaped tubes pivotally connected to each other in crosswise arrangement and disposed between said seat and said slidable base, said U-shaped tubes each having a central portion and ends opposite said central portion, said ends being pivotally connected to said slidable base, said central portion of one of said U-shaped tubes being pivotally connected to one side of said seat, said central portion of the other of said U-shaped tubes being movably engaged to the underside of the opposite side of said seat; two plates secured on said underside of the opposite side of said seat in a parallel arrangement, which each plate having an indented portion formed at its underside; two sliding members provided on said movable central portion with a rectangular opening, and slidably engaged with said plates respectively; a controlling member pivotally connected with said movable central portion with a rectangular opening and having an engaging portion with an opening on the top and an operating portion opposite to said engaging portion, and two protuberances extended upwards; and a first spring member arranged between said sliding members and said engaging portion of said controlling member for biasing said controlling member to rotate in a direction that causes said protuberances to move upwards to engage with said indented portions respectively; a second elastic member arranged at said space of the controlling member with both ends sleeved to the movable central portion and that controlling member.
REFERENCES:
patent: 4019756 (1977-04-01), Ishida
patent: 4359242 (1982-11-01), Garken et al.
patent: 4433869 (1984-02-01), Payne, Jr. et al.
patent: 4576392 (1986-03-01), Quinlan, Jr.
patent: 4615523 (1986-10-01), Chen
Apley Richard J.
Welsh J.
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