Stair-climbing hand truck

Details Stair-climbing hand truck Stair-climbing hand truck

2005-08-30

2005-08-30

Winner, Tony (Department: 3611)

Motor vehicles

Special driving device

Stepper

C180S008300, C280S047210, C280S047270

Reexamination Certificate

active

06935447

ABSTRACT:
A stair-climbing hand truck comprising two casters held in a chassis and a supporting foot constituted by a two-arm lever having a lower support end and an upper end, a supporting foot guide connected to and guiding the upper end of the two-arm lever, a connecting rod having one end linked to the two-arm lever between the lower support end and the upper end, and an end opposite to the one end guided in a connecting rod guide extending transversely to the supporting foot guide, and a crank mechanism connected to the connecting rod.

REFERENCES:
patent: 3494440 (1970-02-01), Hanson
patent: 3499501 (1970-03-01), Bauer
patent: 3788413 (1974-01-01), Miller
patent: 5042827 (1991-08-01), Mortenson
patent: 6164398 (2000-12-01), Alber
patent: 6386552 (2002-05-01), Bierma
patent: 6397960 (2002-06-01), Alber
patent: 6402161 (2002-06-01), Baghdadi
patent: 6752400 (2004-06-01), Nakatsukasa et al.
patent: 19519 109 (1995-05-01), None
patent: 0 903 278 (1999-03-01), None
patent: 1 129 923 (2001-09-01), None

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