Patent ID: 7546908

Claim:
A wheel assembly comprising: a wheel bracket having a bottom and a holding slot defined in the bottom; a connecting base rotatably mounted on the wheel bracket to connect with a moveable object and having a bottom provided with multiple teeth; a wheel rotatably mounted on the wheel bracket with an axle; and a brake device mounted on the wheel bracket, corresponding to the wheel and comprising a brake plate pivotally connected to the wheel bracket and having a first end corresponding to the wheel; a second end corresponding to the connecting base and having a hook selectively engaging with the teeth on the connecting base; and a securing tab formed on the brake plate and securely held inside the holding slot in the wheel brake to pivotally connect the brake plate to the wheel bracket; and a pushbutton pivotally attached to the wheel bracket and corresponding to the first end of the brake plate to push the first end of the brake plate to abut against the wheel when the pushbutton is pressed, wherein the first end of the brake plate is inclined relative to the second end of the brake plate; and the securing tab is formed at a joint between the first end and the second end.