Land vehicles – Wheeled – Coasters
Reexamination Certificate
2000-06-28
2001-08-07
Vanaman, Frank (Department: 3611)
Land vehicles
Wheeled
Coasters
C280S087041
Reexamination Certificate
active
06270097
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a foldable skateboard device. More particularly, the present invention relates to a foldable skateboard device which can be folded easily.
A conventional skateboard device cannot be controlled by hand. If a front tube and a handle bar are added on the conventional skateboard device so that the conventional skateboard device can be controlled by hand, the front tube cannot be folded.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a foldable skateboard device which can be folded easily.
Accordingly, a foldable skateboard device comprises a board, a holding seat disposed on a front portion of the board, a down tube inserted in the holding seat, a front tube connected to the down tube, a front wheel disposed on a bottom of the front tube, and a rear wheel disposed on a rear end of the board. The down tube has an annular flange. The holding seat has a hollow connection portion receiving a lower end of the down tube, a recess, and an upper confining portion. The hollow connection portion of the holding seat has two grooves. A pivot pin fastens the hollow connection portion of the holding seat and the lower end of the down tube together. A sleeve is disposed on a middle portion of the down tube. An elastic element encloses the down tube. The elastic element is disposed between the sleeve and the annular flange. The down tube passes through the sleeve. The upper confining portion of the holding seat engages with the sleeve. A hook-shaped bar is disposed on the sleeve. When the hook-shaped bar is pressed upward, the sleeve disengages from the upper confining portion of the holding seat. An upper portion of the front tube is moved downward until the hook-shaped bar is inserted in the recess of the holding seat. When the sleeve and the elastic element are pressed upward, the upper portion of the front tube is moved downward until the sleeve engages with the upper confining portion of the holding seat.
REFERENCES:
patent: 1658068 (1928-02-01), White
patent: 2170978 (1939-08-01), Smith
patent: 3026161 (1962-03-01), Mickelson
patent: 3126189 (1964-03-01), Van Syoc, Sr.
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patent: 4707884 (1987-11-01), Chang
patent: 5520141 (1996-05-01), Lutz
patent: 6012539 (2000-01-01), Patmont
patent: 6120044 (2000-09-01), Tsai
patent: 6158751 (2000-12-01), Wu et al.
patent: 26760 (1924-03-01), None
patent: 596064 (1925-10-01), None
patent: 185998 (1922-09-01), None
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