Patent ID: 7641165
Filing Date: 2010-01-05
Classification: A45B,E04H,Y10S

Abstract:
1. An adjustable rotation base for supporting an outdoor umbrella having a supporting post on a ground surface, wherein the adjustable rotation base comprises: a base housing having a bottom side, an upper side for coupling with the supporting post to support the outer umbrella in an upright manner, and a receiving cavity indently formed on the bottom side of the base housing, wherein the base housing comprises a stationary unit provided at the bottom side for stationary sitting on the ground surface and a plurality of transferring wheels rotatably supported at the bottom side of the base housing; and an transportation arrangement provided at the base housing to operate the base housing between an idle mode and a transportation mode, wherein in the idle mode, the transferring wheels are suspenedly lifted up to define a clearance between the transferring wheels and the ground surface such the base housing is stationary sat on the ground surface via the stationary unit, and in the transportation mode, the stationary unit is upwardly and concurrently lifted to allow the transferring wheels being sitting on the ground surface, such that the base housing is adapted to be transported on the ground surface via the transferring wheels, wherein said transportation arrangement comprises an adjustment assembly coupling with said transferring wheels and a manual actuation unit manually and selectively operating said adjustment assembly to move said transferring wheels between said idle mode and said transportation mode, wherein said adjustment assembly comprises a transferring magnitude unit operatively coupled with said manual actuation unit and a leverage driving unit which comprises a central hub coupling with said transferring magnitude unit and a plurality of levers radially and pivotally coupled with said central hub to couple with said transferring wheels respectively, wherein when said manual actuation unit is operated for generating a rotational force, said central hub is lifted upwardly to drop down said transferring wheels at said transportation mode.