Abstract: A caster assembly of the present invention includes a fixation base, a rotary base which is rotatably disposed on the fixation base, a wheel which is rotatably disposed on the rotary base, and a brake mechanism. The brake mechanism is disposed on the rotary base. The brake mechanism can be activated to abut against the wheel and the fixation base, so that rotations of the rotary base and the wheel are obstructed. Thus, stably fixation function is provided.

Abstract: A friction wheel includes a hub, two bearings mounted in the hub and each having an axle, and a friction member mounted between the hub and the axle of each of the two bearings. Thus, the friction member is mounted between the hub and the axle of each of the two bearings to increase the friction between the hub and the axle of each of the two bearings so that the user has to apply a larger force to overcome the friction between the hub and the axle of each of the two bearings so as to move the cart forward, thereby preventing the cart from being moved freely.

Abstract: A conductive wheel for a cart includes a hub, a tread mounted on the hub, two bearings mounted in the hub and each having a axle, and an electrically conductive assembly mounted in the hub and the tread. Thus, the electrically conductive assembly will form a grounding effect to conduct and release the static charges produced between the two bearings and the cart to the ground so as to prevent from causing an electrical shock to a user when the user touching the cart, thereby protecting the user's safety when operating the cart.

Abstract: A conductive wheel for a cart includes a hub, a tread mounted on the hub, two bearings mounted in the hub and each having a axle, and an electrically conductive assembly mounted in the hub and the tread. Thus, the electrically conductive assembly will form a grounding effect to conduct and release the static charges produced between the two bearings and the cart to the ground so as to prevent from causing an electrical shock to a user when the user touching the cart, thereby protecting the user's safety when operating the cart.

Abstract: A friction wheel includes a hub, two bearings mounted in the hub and each having an axle, and a friction member mounted between the hub and the axle of each of the two bearings. Thus, the friction member is mounted between the hub and the axle of each of the two bearings to increase the friction between the hub and the axle of each of the two bearings so that the user has to apply a larger force to overcome the friction between the hub and the axle of each of the two bearings so as to move the cart forward, thereby preventing the cart from being moved freely.

Abstract: A castor includes a connecting board, a base bracket connected with the connecting board, a locking disk connected with the connecting board, a wheel mounted on the base bracket, a mounting bracket secured on the base bracket, a braking member connected with the mounting bracket, and a drive unit connected with the braking member. The locking disk has a locking portion. The braking member has a first end provided with a locking section and a second end provided with a mounting portion which has a braking section. Thus, the braking member is pivoted by the drive unit so that the braking section of the braking member is moved to press and brake the wheel, and the locking section of the braking member is moved to engage the locking portion of the locking disk so as to lock the base bracket.