Abstract: A lifting device for an umbrella includes a base, a plurality of fixing seats secured on the base, a plurality of movable members each movably mounted in the respective fixing seat, a pressing module movably mounted on the base and pressing the movable members, a threaded rod mounted on the base and connected with the pressing module, and a drive handle connected with the threaded rod. The pressing module includes a driven rod and two pressing rods. Each of the pressing rods is provided with a straight pressing portion that is movable to press the respective movable member and at least one recessed release portion that is movable to receive the respective movable member. Thus, each of the movable members is rotatable freely so that the lifting device is moved on the ground easily.

Abstract: An umbrella stand includes a housing and an operation mechanism mounted on the housing. The operation mechanism includes a support frame mounted in the housing and having two receiving slots, two mounting plates each pivotally mounted on the support frame, two pivot shafts each mounted in the support frame and each extended through a respective one of the mounting plates, two castors each rotatably mounted on a respective one of the mounting plates, two mounting tubes secured on the support frame, a driven rod rotatably mounted in the mounting tubes, two pressing plates secured on the driven rod and each pressing a respective one of the mounting plates, and a control handle connected with the driven rod to rotate the driven rod. Thus, the housing is movable freely on the ground by operation of the operation mechanism.

Abstract: A umbrella includes an upright post, a swing mechanism pivotally mounted on the upright post, a frame mounted on the swing mechanism to pivot in concert with the swing mechanism relative to the upright post, and a driving mechanism mounted on the upright post and connected with the swing mechanism to drive the swing mechanism to pivot relative to the upright post. Thus, the frame is rolled relative to the upright post to tilt leftward or rightward to adjust the inclined angle of the skeleton of the frame so as to provide a better shading effect.

Abstract: An umbrella includes an upright post, a swing mechanism mounted on the upright post and a frame mounted on the swing mechanism. The swing mechanism includes a mounting seat mounted on the upright post, a pivot seat pivotally mounted on the mounting seat and having a lower end provided with a worm wheel, a worm rotatably mounted on the mounting seat and meshing with the worm wheel, a driven gear secured on the worm, a propeller shaft rotatably mounted on the upright post, a drive gear secured on the propeller shaft and meshing with the driven gear, and a rocker arm secured on the propeller shaft. Thus, when the swing mechanism is operated, the frame is rolled and tilted relative to the upright post leftward or rightward to adjust the inclined angle the frame to provide a better shading effect.

Abstract: An umbrella includes a shank, a fixed ring mounted on the shank, a movable ring movably mounted on the shank, a plurality of ribs each pivotally and detachably connected with the fixed ring, and a plurality of spreaders each pivotally and detachably connected with the movable ring. Thus, each of the spreaders and the ribs can be removed from the movable ring and the fixed ring respectively for replacement or maintenance, thereby enhancing the lifetime of the umbrella.