Hand truck

Land vehicles – Wheeled – Extensible

Reexamination Certificate

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Details

C280S655100, C280S047180, C280S047270

Reexamination Certificate

active

07398990

ABSTRACT:
A hand truck includes a bottom base, a reinforcing member, a positing device and a handle. The bottom base consists of a U-shaped tube and a bottom plate combined vertically with a lower end of the U-shaped tube, which has two elongate side vertical portions provided with a lengthwise center hole. The reinforcing member has two side vertical tubes and two lateral rods fixed between the two side vertical tubes, which fit tightly around an intermediate section of the two side vertical portions of the U-shaped for upgrading the strength of the U-shaped tube. The position device is to stabilize the handle at an adjusted position after moved up and down and adjusted in its height relative to the U-shaped tube.

REFERENCES:
patent: 3443821 (1969-05-01), Alexander
patent: 3998476 (1976-12-01), Kazmark, Sr.
patent: 4284287 (1981-08-01), Esposito
patent: 4546995 (1985-10-01), Kassai
patent: 5024458 (1991-06-01), Kazmark et al.
patent: 5127664 (1992-07-01), Cheng
patent: 5476282 (1995-12-01), Dahl
patent: 5803471 (1998-09-01), DeMars et al.
patent: 5941543 (1999-08-01), Kazmark, Jr.
patent: 5971424 (1999-10-01), Ingalls
patent: 5984327 (1999-11-01), Hsieh et al.
patent: 6053514 (2000-04-01), Su
patent: 6866290 (2005-03-01), Tsai
patent: 6971654 (2005-12-01), Amsili
patent: 7044484 (2006-05-01), Wang
patent: D522708 (2006-06-01), Chang

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