Land vehicles: wheels and axles – Axle – With distinct handle to effect mounting on cycle-type vehicle
Reexamination Certificate
2002-02-15
2003-05-13
Morano, S. Joseph (Department: 3617)
Land vehicles: wheels and axles
Axle
With distinct handle to effect mounting on cycle-type vehicle
C280S205000, C180S252000
Reexamination Certificate
active
06561594
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a wheel shaft structure of a monocycle, and more particularly to a wheel shaft structure of a monocycle, wherein the wheel shaft structure may be operated conveniently, thereby facilitating maintenance and thereby saving time and manual work.
2. Description of the Related Art
A conventional monocycle in accordance with the prior art has a complicated structure, thereby increasing cost of fabrication. In addition, the conventional monocycle cannot be assembled conveniently, thereby consuming time and manual work. Further, the conventional monocycle does not have a brake effect, thereby easily causing injury to the rider.
SUMMARY OF THE INVENTION
The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional monocycle.
The primary objective of the present invention is to provide a wheel shaft structure of a monocycle, wherein the wheel shaft structure may be operated conveniently, thereby facilitating maintenance and thereby saving time and manual work.
Another objective of the present invention is to provide a wheel shaft structure of a monocycle, wherein the wheel shaft structure may be assembled easily, conveniently and rapidly.
A further objective of the present invention is to provide a wheel shaft structure of a monocycle, wherein the wheel shaft structure has a simple construction, thereby saving cost of fabrication.
A further objective of the present invention is to provide a wheel shaft structure of a monocycle, wherein the wheel shaft structure has a braking effect.
In accordance with the present invention, there is provided a wheel shaft structure of a monocycle, comprising a wheel rim, and a shaft assembly mounted in a center of the wheel rim, wherein:
the shaft assembly includes a wheel shaft passed through the wheel rim, two opposite single-direction bearings symmetrically mounted on the wheel shaft and received in the central hole of the wheel rim, and two opposite double-direction bearings symmetrically mounted on the wheel shaft and received in the central hole of the wheel rim.
Preferably, the wheel shaft of the shaft assembly is passed through a central hole of the wheel rim.
Preferably, the two opposite single-direction bearings are located in the two opposite double-direction bearings.
REFERENCES:
patent: 3083036 (1963-03-01), Cornell, III et al.
patent: 3948333 (1976-04-01), van Lent
patent: 4194751 (1980-03-01), Shinmura
patent: 5199727 (1993-04-01), Lai
patent: 5314034 (1994-05-01), Chittal
patent: 5868413 (1999-02-01), Cabrera
patent: 5950784 (1999-09-01), Yang
patent: 6270438 (2001-08-01), Liao
patent: 6386644 (2002-05-01), Chen
Morano S. Joseph
Nguyen Long
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