Patent ID: 8636020

Claim:
An outdoor umbrella, comprising: an awning frame; a supporting shaft supporting said awning frame; and an adjustable rotation base, which comprise: a base housing, having a receiving cavity and a bottom edge, arranged to couple with said supporting shaft to support said awning frame in an upright manner, and comprises a plurality of transferring wheels; and a transportation arrangement provided at said base housing to operate said base housing between an idle mode and a transportation mode, wherein in said idle mode, said transferring wheels are suspenedly lifted up to position above said bottom edge of said base housing for defining a clearance between the transferring wheels and the ground surface such said base housing is sat on the ground surface in a stationary manner, wherein in said transportation mode, said base housing is lifted up by air pressure for allowing said transferring wheels to move out of said receiving cavity at a position below said bottom edge of said base housing for allowing said transferring wheels to rotatably sit on a ground surface to free transport said outdoor umbrella along said ground surface, wherein said transportation arrangement further comprises a plurality of actuation units provided at four corner portions of said base housing for selectively operating said base housing between said transportation mode and said idle mode, wherein each of said actuation units comprises a driving member, having an actuation cavity, movably received in said base housing and operatively coupled with said corresponding transferring wheel, in such a manner that when said driving member is driven to move downwardly, said corresponding transferring wheel is also driven to move downwardly for generating an upward force exerted to said base housing so as to uplift said base housing at a predetermined elevation with respect to the ground surface on which said outdoor umbrella stands.