Wheel structure with a central control

Details Wheel structure with a central control Wheel structure with a central control

2007-07-31

2009-11-10

Batson, Victor (Department: 3677)

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Casters

Locked

C016S01800R

Reexamination Certificate

active

07614115

ABSTRACT:
A wheel structure includes a central sleeve, a central controlling shaft joined to the central shaft, a wheel pivoting on an extension portion of the central shaft, and a braking unit; the central controlling shaft includes a controlling piece, and a connecting part for controlling the controlling piece; a position-limiting element is secured in the central sleeve, which is next to the controlling piece, and has a position-limiting hole having the same outline as the controlling piece; the braking unit is arranged in the central sleeve in a movable manner, and biased upwards by springs; the central controlling shaft is operable to change the wheel into first, second, and third configurations; in the first configuration, the wheel can move and turn left and right freely; in the second one, the wheel can only move in a direct course; in the third one, the wheel is immobile.

REFERENCES:
patent: 4677706 (1987-07-01), Screen
patent: 4722114 (1988-02-01), Neumann
patent: 4815161 (1989-03-01), Timmer et al.
patent: 5774936 (1998-07-01), Vetter
patent: 6584641 (2003-07-01), Milbredt
patent: 6865775 (2005-03-01), Ganance
patent: 7200894 (2007-04-01), Block et al.
patent: 2004/0068831 (2004-04-01), Caruso et al.
patent: 2004/0117943 (2004-06-01), Block et al.

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