Land vehicles – Wheeled – Tiltable vehicles – stabilized by attendant or article
Patent
1996-09-27
1998-06-23
Johnson, Brian L.
Land vehicles
Wheeled
Tiltable vehicles, stabilized by attendant or article
280 4734, 280 4735, 280641, 280 4718, B62B 122
Patent
active
057694362
DESCRIPTION:
BRIEF SUMMARY
This application is a 35 USC 371 of PCT/FR95/00409 filed on Mar. 30, 1995.
TECHNICAL FIELD
The present invention concerns the movable devices of the retractable wheel type and more precisely a movable parasol stand with retractable and concealed wheels.
1. Prior Art
Conventional parasol stands are generally static and difficult to move. Some stands that nevertheless offer a good laying, can be source of damages when moved, such as backaches, ground damages, or risks of accidents.
There is however on the market parasol stands mounted on retractable wheels, such as the one described in Patent CH-A-682.975, in which the three retractable wheels are lowered on to the ground when operating a lever that itself lifts the stand by means of a Rack & Pinion device. However, such a stand has many movable and articulated parts that make it complex and are bound to dysfunction. Moreover, this stand is not easy to control when moved because the three wheels are not always directed in the same direction, and also because the lever serving to lower the wheels is not adapted to easily move the stand.
2. Invention Presentation
The aim of the invention is therefore to carry out a parasol stand or any other heavy object to move, that does not have any movable and articulated parts and that is easy to move.
Therefore the aim of the invention is a movable device with retractable wheels designed to move a heavy or bulky object, more precisely a parasol stand, of the type that includes a framework resting on the ground in the rest position, and a movable system with retracted wheels in the rest position, that rests on the ground when the movable system is operated to move the object. The movable device comprises a movable part that rotates about a pivot axis secured to the framework; at least two wheels, each in free rotation about an axis fixed to a first end of the movable part; an abutment member located on a second end of the movable part and blocked in its upper movement by the framework and a lever firmly attached to the movable system at a point located at an intermediate position between the pivot axis of the movable system and the abutment member. Thus, a force applied downwards on the lever will, thanks to the bearing constituted by the abutment member that is blocked by the retaining element of the framework, allow to raise the framework while at the same time the wheels are lowered to the ground, in order to move the object to another location while running the wheels on the ground.
BRIEF DESCRIPTION OF THE FIGURES
The aims, objects and characteristics of the invention will appear more clearly upon reading the following description made in reference with the drawings in which:
FIG. 1a is a schematic representation of the device of the invention in the static position.
FIG. 1b is a schematic representation of the device of the invention in the moving position.
FIG. 2 is a perspective representation of the movable system of the device of the invention according to a first embodiment.
FIG. 3 is a perspective representation of the framework support used in the device of the invention according to the first embodiment.
FIG. 4 is a schematic representation showing the raising action of the framework done by the movable system when operating the lever of the device of the invention.
FIG. 5 is a representation in perspective of the movable system of the device of the invention according to a second embodiment, and
FIG. 6 is a top view in section representing schematically the device of the invention according to the second embodiment.
DETAILED DESCRIPTION OF THE INVENTION
The device according to the invention which is a parasol stand, represented schematically in the rest position in FIG. 1a and in the moving position in FIG. 1b, includes essentially two parts, one framework that is mostly composed of the object to be moved and that is heavy enough not to be moved alone easily, and a movable system articulated about an axis secured to the framework.
In the example of FIGS. 1a and 1b, the framework includes the mast o
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Androll
Avery Bridget
Johnson Brian L.
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