Land vehicles – Wheeled – Extensible
Patent
1995-11-06
1997-10-21
Johnson, Brian L.
Land vehicles
Wheeled
Extensible
280 47315, B62B 112
Patent
active
056788436
ABSTRACT:
A luggage trolley structure includes a wheeled base to which two upright bars are mounted, each having three telescoping sections, an upper section, an intermediate section and a lower section. A telescoping mechanism is provided within each of the bars. The telescoping mechanism includes a slide movably received within the upper section of upright bar and connected to a manually movable member to be moved thereby. The slide has a slot of gradually increasing depth within which a spherical member is received so that by the inclination of the slot, when the slide is moved relative to the upper section, the spherical member is forced to project through a hole formed the intermediate section and a hole formed on the upper section so as to retain them at the expanded position. The slide also has an inclined lower surface which cooperates with a leaf spring that has a first limb fixed inside the intermediate section and a second limb fixed to a positioning pin movably retained within a hole formed on the intermediate section to be biased into a hole formed on the lower section for retaining the intermediate and lower sections at the expanded position to release the retaining engagement between the pin and the hole of the lower section.
REFERENCES:
patent: 5308103 (1994-05-01), Liu
patent: 5351984 (1994-10-01), Cheng
patent: 5367743 (1994-11-01), Chang
patent: 5371923 (1994-12-01), Chang
Johnson Brian L.
Vanaman Frank
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