Patent ID: 6360851
Filing Date: 2002-03-26
Classification: B60B,Y10T

Abstract:
The invention of a caster structure functioning brake and stop rotation, comprises of a wheel base, a pair of wheels, an axle, a shaft, a clip element, a slide base, a fixture pin, a clip block and two springs; furthermore, one end of the wheel base forms a vertical shaft opening for penetration of a shaft and on the central bottom of a wheel is an axle hole for the penetration of the axle in connecting two wheels, also the inner of the wheel forms ditches; the inner of the wheel further comprises the wheel base is in a semi-circular shape, of which the horizontal bottom interior forms a horizontal container groove, which transversally passes through a central axle opening base and connects the vertical shaft hole; also, one end of the container groove extends upward to form a groove and there are slots on both sides corresponding to the vertical shaft hole end, while a hole on the other end; moreover, on the corresponding location of the opening, the shaft forms a convex ring with respect to a positioning groove; therefore, the clip element forms a connecting portion secured in the container groove of the wheel base with a pin connection and the connecting portion equips a long-end and a short-end with respect to the connecting portion center; furthermore, the slide base located on the bottom container groove forms a slide groove in the center to correspond the shaft hole on the wheel base for the shaft penetration, also, one end of the slide base is pushed by a spring to constantly move toward the connecting portion of the clip element and on the other end is a pin hole equipped for transversal penetration of a fixture pin, which passes through the slot of the wheel base; moreover, a clip block is inserted inside the slide base on the end with a fixture pin to join the groove and to transversally connect a spring, which pushes the block to hit one end of the slide base; thus, by pushing the clip element for dual-brake, the connecting portion rotates and pushes the slide base from the long-end to make a fixture pin extrude to reach the ditch of the wheel, also, the clip block moves together with the slide base by the push of a spring element to exactly reach the positioning groove on a convex ring, thus, it simultaneously brakes the wheel and fix the wheel base with no rotation.