Child's walker with height adjustment apparatus

Details Child's walker with height adjustment apparatus Child's walker with height adjustment apparatus

1985-06-19

1986-10-07

Hafer, Robert A.

Undertaking

280 8702W, 297 5, A61H 300, A47D 1304

Patent

active

046155236

ABSTRACT:
The present invention discloses an apparatus for adjusting the height of a walker which includes a seat, a slidable base, and two U-shaped tubes which are pivotally connected to each other in a crosswise arrangement and are placed between the seat and the slidable base with one central portion of one U-shaped tubes pivotally connected to the rear side of the seat, and the other central portion of the other U-shaped tube movably engaged to the underside of the seat near its front side, the adjusting apparatus comprising two plates secured on the underside of the seat in a parallel arrangement, with each plate having an indented portion formed at its underside; two sliding members provided on the movable central portion, and slidably engaged with the plates respectively; a controlling member pivotally connected with the movable central portion, and having an engaging portion, with an operating portion opposite to the engaging portion, and two protuberances extended upwards; and a spring member arranged between the sliding members and the engaging portion of the controlling member for biasing the controlling member to rotate in a direction that causes the protuberances to move upwards to engage with the indented portions respectively.

REFERENCES:
patent: 313280 (1885-03-01), Bell
patent: 1982205 (1934-11-01), Doman
patent: 2908984 (1959-10-01), Lantz
patent: 3532356 (1970-10-01), Lillibridge
patent: 3884495 (1975-05-01), Petock
patent: 4019756 (1977-04-01), Ishida
patent: 4168669 (1979-09-01), Arnoff
patent: 4359242 (1982-11-01), Gerken et al.
patent: 4433869 (1984-02-01), Payne, Jr. et al.

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