Abstract: A caster includes a casing having a shank and a locking unit is located at a lower end of the shank. Two wheels are connected to two sides of the casing by a shaft and an inner gear is connected to each of the two wheels. A direction unit is located in the casing and includes a first lever and an opening, the first lever connects the direction unit to the locking unit. A brake unit is located in the casing and includes a second lever. The second lever connects the brake unit to the locking unit and the inner gears. The second lever is engaged with the opening of the first lever and shares a common pivot with the first lever so as to respectively brake the caster and control direction of the caster.

Abstract: A caster includes a casing having a shank and a locking unit is located at a lower end of the shank. Two wheels are connected to two sides of the casing by a shaft and an inner gear is connected to each of the two wheels. A direction unit is located in the casing and includes a first lever and an opening, the first lever connects the direction unit to the locking unit. A brake unit is located in the casing and includes a second lever. The second lever connects the brake unit to the locking unit and the inner gears. The second lever is engaged with the opening of the first lever and shares a common pivot with the first lever so as to respectively brake the caster and control direction of the caster.

Abstract: An improved brake structure for casters including a caster frame having a through pivot hole, two rollers mounted pivotally at the ends of the through pivot hole of the caster frame and having inner teeth, a rotary shaft pivotally mounted at a rear end of the caster frame to support an object such as a leg of a table or chair, a trigger element pivotally mounted at a front end of the caster frame, a first stop element for stopping the relative movement of the inner teeth of the rollers, a first spring element for urging the first stop element. The brake structure is characterized in that a second stop element is pivotally disposed below the trigger element and capable of horizontal displacement. The second stop element includes a front urging portion and a rear bent baffle wall. The trigger element further includes a trigger tab extending downwardly therefrom. When the trigger element deflects, the trigger tab will push the baffle wall.