Folding hand truck auxiliary wheel structure

Details Folding hand truck auxiliary wheel structure Folding hand truck auxiliary wheel structure

1991-06-11

1992-03-17

Stormer, Russell D.

Land vehicles: wheels and axles

Wheel

Device for attaching wheel to axle

301 1, 280 528, 280 431, 280 472, B60B 1900, B60B 3700

Patent

active

050962655

ABSTRACT:
A folding hand truck auxiliary wheel structure comprising an U-shaped auxiliary wheel frame adjustably secured to the wheel frame of a folding hand truck by a stop plate and a U-shaped spring wire to hold a pair of auxiliary wheels, wherein the U-shaped auxiliary wheel frame has a plurality of pairs of pin holes symmetrically made on the two linked, elongated rods thereof along longitudinal direction; the stop plate has two curved portions spaced from each other for fastening the two linked, elongated rods of the U-shaped auxiliary wheel frame which have each a pin hole at an inner side. The auxiliary wheels are extended out and fixedly set at a level below the wheels on the wheel frame of the folding hand truck to which the auxiliary wheel structure is attached when the two opposite ends of the U-shaped spring wire are respectively fastened through the pin holes on the stop plate into the first pair of pin holes on the U-shaped auxiliary wheel frame, or received back into an idle position when the two opposite ends of the U-shaped spring wire are fastened into the last pair of pin holes on the U-shaped auxiliary wheel frame.

REFERENCES:
patent: 3499658 (1970-03-01), Fernholz et al.
patent: 3499659 (1970-03-01), Capadalis
patent: 4310166 (1982-01-01), Eicher
patent: 4858940 (1989-08-01), Cheng

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