Mechanism for adjusting height of handle bar of pushcart

Details Mechanism for adjusting height of handle bar of pushcart Mechanism for adjusting height of handle bar of pushcart

1989-03-10

1990-05-15

Luong, Vinh T.

Machine element or mechanism

Control lever and linkage systems

Elements

280 47315, 280 47371, B62K 2116

Patent

active

049247255

ABSTRACT:
A mechanism for adjusting the height of a handle bar for a baby carriage in which upwardly-extending tubular bars are slidably fitted into the end portions of a U-shaped handgrip bar having a hollow tubular construction. A plurality of engaging apertures are formed in the side of each of the upwardly-extending bars adjacent to an upper end and spaced at predetermined intervals. The engaging apertures are connected together by narrow slots. A retainer member is engaged with each of the two end portions of the handgrip bar and is disposed at a position corresponding to the engaging apertures. Inclined flanges projecting from opposite sides of the retainer member are received respectively in inclined slide guide grooves formed in an elevation operating member. The retainer member is moved outwardly and inwardly in a direction perpendicular to the sliding movement of the elevation operating member when the elevation operating member is slid up and down.

REFERENCES:
patent: 919729 (1909-04-01), Kleine
patent: 3084949 (1963-04-01), Forster et al.
patent: 3933373 (1976-01-01), Gammelgaard
patent: 3998476 (1976-12-01), Kazmark
patent: 4011913 (1977-03-01), Davies et al.
patent: 4563912 (1986-01-01), Parks
patent: 4577877 (1986-03-01), Kassai
patent: 4587864 (1986-05-01), Kassai
patent: 4733882 (1988-03-01), Kassai
patent: 4813693 (1989-03-01), Lockard et al.
patent: 4832361 (1989-05-01), Nakao et al.

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