Patent Application
20080018166
The present invention will be better understood from the following detailed descriptions of the preferred embodiments according to the present invention, taken in conjunction with the accompanying drawings, in which
The following descriptions of the preferred embodiments are provided to understand the features and the structures of the present invention.
Please refer to
The frame unit 1 comprises two corresponding plates 11, 12. There is a gap 13 between the plates 11, 12 to be set with the rolling units 2. The frame unit 1 comprises five connecting members 1. Each connecting member 10 is gradually extended wider and wider from corresponding points on outside circles of the plates 11, 12 toward two corresponding centers of the plates 11, 12; and has axis holes 101 on the plates 11, 12 near the outside circles of the plates 11, 12. At center of the frame unit 1, there is a frame hole 14; and the frame hole 14 is set with an assembling member 16. Or, in a second preferred embodiment, as shown in
The rolling units 2 are movably set in the gap 13 between the plates 11, 12; and each rolling unit 2 is connected at the corresponding axis holes 101 of the connecting member 10 by using a spindle 21. Each rolling unit 2 comprises a rim 22; and a tire 23 covering outside of the rim 22. And the rolling unit 2 is a circular elastic unit or a castor (not shown in the figures).
Thus, a novel wheel apparatus is obtained.
Please refer to
A user holds a grip 33 at an end of the carrying device 3 to haul the carrying device 3. When the carrying device 3 is hauled by the user, the case unit 31 of the carrying device 3 is tilted with two rolling units 2 rolling on the ground. When stopping hauling, the case unit 31 of the carrying device 3 is vertically positioned; and the two rolling units 2 are coordinated with original wheels 34 to stand the carrying device 3 firmly on the ground. Or, the carrying device 3 is horizontally moves on a surface of a normal ground with the two rolling units 2 coordinated with the original wheels 34.
When the user hauls the carrying device 3 with the grip 33 to go up stairs 4, the case unit 31 is vertically positioned or is tilted as required to move by rolling the two rolling units 2 on stair tread 41. When the carrying device 3 reaches a stair riser 42 of a step of the stairs 4, the rolling units 2 contact on the stair riser 42 and rolls. When an edge of the step is reached and the user keeps walking up, a rolling unit 2 contacts the stair tread 43 of an upper step first then another rolling unit 2 further contacts with the stair tread 43 of the upper step later to position the carrying device 3 on the upper step with the two rolling units 2. In this way, when the carrying device 3 is hailed by the user, stairs 4 or other special ground surface is overcome to pass through easily and smoothly.
Please refer to
To sum up, the present invention is a wheel apparatus, where, after assembling a carrying device with at least two of the present invention, the carrying device is hauled by a user to pass through stairs or other special ground surface easily and smoothly through coordination between a frame unit and rolling units.
The preferred embodiments herein disclosed are not intended to unnecessarily limit the scope of the invention. Therefore, simple modifications or variations belonging to the equivalent of the scope of the claims and the instructions disclosed herein for a patent are all within the scope of the present invention.
