Patent ID: 6585219
Filing Date: 2003-07-01
Classification: A45B,F16C,F16M

Abstract:
A multi-functional adjustable base for a sun shading umbrella having a supporting stem, comprising:a base support; a stem rotary member rotatably supported by said base support and adapted for firmly holding the supporting stem; and a controlling arrangement, which comprises: a transmission member, which is pivotally supported by said base support, having an engaging end adapted for engaging with said stem rotary member; means for securely engaging said engaging end of said transmission member with said stem rotary member, wherein said engaging means comprises a plurality of engaging teeth radically and integrally formed on said engaging end of said transmission member, and at least one engaging member extended outwardly from an external surface of said stem rotary member and adapted for securely engaging with said plurality of engaging teeth of said transmission member; an activating member operatively connected to said transmission member for switching said stem rotary member between a locked state and a freely rotating state, wherein in said locked state, said stem rotary member is firmly engaged with said engaging end of said transmission member so as to restrict a rotational movement of said stem rotary member with respect to said base support, and wherein in said freely rotating state, said stem rotary member disengages with said transmission member so that said stem rotary member is capable of freely rotating with respect to said base support, wherein said activating member comprises a paddle integrally and transversely connected to said transmission member and extended outside said base support, so that when said paddle is depressed downwardly by a depressing force, said engaging end of said transmission member is pivotally moved aside toward said paddle, and at the same time, lifted up to disengage said plurality of said engaging teeth from said engaging member of said stem rotary member so as to allow said free rotational movement of said stem rotary member; a resilient element having one end mounted on said base support and another end arranged for biasing against said transmission member so as to normally apply a transverse pushing force toward said transmission member so as to automatically lower said engaging end of said transmission member and let said engaging end of said transmission member reengaging with said engaging member of said stem rotary member when said depressing force of said paddle is relieved; and a plurality of rotary supports supported by said base support and rotatably connected to said stem rotary member for facilitating said rotational movement thereof with respect to said base support.