Handcart

Details Handcart Handcart

2001-06-19

2003-04-01

Johnson, Brian L. (Department: 3618)

Land vehicles

Wheeled

Extensible

C414S495000, C254S00200C

Reexamination Certificate

active

06540241

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a handcart, and more particularly to a handcart of which a coupler is detachably mounted thereon for ease of replacement when necessary.
2. Description of Related Art
Referring to
FIG. 4
, a conventional handcart has a body (
70
) with two parallel support rails (
706
). The support rails (
706
) are connected together by two arms (
701
) respectively formed thereon. Two elongated bars (
705
) are respectively provided under the rear ends of the support rails (
706
). A coupler (
90
) is welded on a rear end of the body (
70
) and has a connecting bar (
91
) with two links (
92
) formed respectively at two ends of the connecting bar (
91
). Both ends of the connecting bar (
91
) are respectively welded with the arms (
701
). Front ends of the links (
92
) are respectively engaged with the elongated bars (
705
) and rear ends of the links (
92
) are pivotally mounted on a lifter (
80
). The lifter (
80
) has a handle (
801
) for being operated by a user.
In use, the user put the support rails (
706
) under a bottom of a bale and operates the handle (
801
) to lift up the support rails (
706
). Then, the bale is mounted on the support rails (
706
) and free from the ground whereby the handcart can be pulled to move.
However, it is often found that the connecting bar (
91
) becomes deformed when the handcart is overloaded. Because the connecting bar (
91
) is integrated with the arms (
701
) by welding, when the handcart is repaired and the connecting bar (
91
) is replaced, the arms (
701
) also have to be replaced. Therefore, the cost of repairing the handcart is almost equal to the price of a new one. The cost is so uneconomic that few such defective handcarts are repaired and most of them are abandoned thereby leading to considerable waste.
Therefore, the invention provides a handcart to mitigate and/or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
The main objective of the invention is to provide a handcart of which a coupler is detachably mounted between a body and a lifter.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 3567240 (1971-03-01), Brassington
patent: 3576333 (1971-04-01), Danielson
patent: 3814456 (1974-06-01), Bryntse
patent: 3817546 (1974-06-01), Sugiura
patent: 3982767 (1976-09-01), Larsson et al.
patent: 4424885 (1984-01-01), Kedem
patent: 4589669 (1986-05-01), Kedem
patent: 4669561 (1987-06-01), Sheen
patent: 4938493 (1990-07-01), Okuda
patent: 4969794 (1990-11-01), Larsen
patent: 5403024 (1995-04-01), Frketic
patent: 5951234 (1999-09-01), Johansson

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