초록 ▼

An I.V. support stand (10) includes a support section and a base (20). The base (20) includes a base body and a plurality of wheel assemblies (24), each wheel assembly including a wheel support (26) operatively mounted to the base body for pivotal movement relative thereto and at least one wheel (28

An I.V. support stand (10) includes a support section and a base (20). The base (20) includes a base body and a plurality of wheel assemblies (24), each wheel assembly including a wheel support (26) operatively mounted to the base body for pivotal movement relative thereto and at least one wheel (28) operatively mounted to the wheel support. The wheel supports are pivotally movable relative to the base body between an extended position in which the wheels rest on a support surface and retracted position, the arrangement being such that when the base is disposed on the support surface the wheels are caused to adopt the extended position and when the base is moved clear of the support surface the wheel assemblies are caused to adopt the retracted position.

대표청구항 ▼

1. An apparatus for carrying articles including a support stand and a clamp assembly, the clamp assembly including a clamp member adapted to be secured to a support structure which is adapted to be raised or lowered, the support stand including a pole having a longitudinal axis with a clamp mounting

1. An apparatus for carrying articles including a support stand and a clamp assembly, the clamp assembly including a clamp member adapted to be secured to a support structure which is adapted to be raised or lowered, the support stand including a pole having a longitudinal axis with a clamp mounting portion thereon and a mounting hub to which the pole is attached, an actuating member which is axially movable relative to the mounting hub along the pole above said mounting hub, a plurality of wheel assemblies each including a wheel support pivotally mounted at an inner end to the actuating member and at least one wheel operatively mounted to an outer end of the wheel support, and a control link wherein one end of the control link is pivotally connected intermediate said inner and outer ends of the wheel support and the opposite end of the control link is pivotally connected to the mounting hub, whereby axial movement of the actuating member away from said mounting hub follows movement of each wheel support between a position extending substantially radially of the actuating member where the wheels rest on a floor surface when the clamp member is released, and a retracted position where the pole is held by the clamp member and in which the wheel supports lay substantially adjacent the pole and mounting hub, the wheel supports when in the retracted position being inclined with respect to the longitudinal axis of the pole and mounting hub whereby when the wheels contact a floor surface when the wheel supports are in the retracted position, further movement of the support stand toward the floor surface causes the wheel supports to move into the extended position. 2. The apparatus according to claim 1, wherein the mounting hub includes a plurality of wheel support mountings circumferentially spaced about the mounting hub and extending therefrom, each support mounting being adapted to have pivotally mounted thereto one of the wheel supports. 3. The apparatus according to claim 1, wherein the wheel supports are biased to the retracted position by the influence of gravity on said wheel supports. 4. The apparatus according to claim 1, including a releasable locking assembly for releasably retaining the wheel supports in the retracted position. 5. The apparatus according to claim 4, wherein the releasable locking assembly includes a spring loaded ball-and-detent arrangement between the pole and the actuating member. 6. The apparatus according to claim 1, wherein each control link is configured to provide a limit of movement of said wheel supports at an extended position. 7. The apparatus according to claim 4, wherein the releasable locking assembly is adapted to automatically release from a holding position when load is placed on the pole to enable movement of the wheel supports from the retracted position to the extended position without manual operation of the actuator. 8. The apparatus according to claim 5, wherein there is provided a second detent recess adapted to engage said detent ball when said wheel supports are in their extended position. 9. The apparatus according to claim 1, wherein a limit of deployment of said wheel supports is provided by said actuating member contacting said mounting hub.