Land vehicles – Wheeled – Stable vehicles – handle-propelled
Reexamination Certificate
2001-08-28
2003-01-21
Johnson, Brian L. (Department: 3618)
Land vehicles
Wheeled
Stable vehicles, handle-propelled
C280S047110, C188S021000, C188S022000
Reexamination Certificate
active
06508479
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a wagon, more particularly to a wagon with a wheel braking device.
2. Description of the Related Art
FIG. 1
illustrates a conventional wagon
1
that includes a cart body
11
for disposing goods thereon, and a steering rod
14
. The cart body
11
has opposite front and rear ends, a bottom side
10
, a front wheel unit
12
mounted on the bottom side
10
adjacent to the front end, and a rear wheel unit
13
mounted on the bottom side
10
adjacent to the rear end. The front wheel unit
12
includes a front support seat
121
connected pivotally to the bottom side
10
, and a pair of front wheels
122
carried by the front support seat
121
. The rear wheel unit
13
includes a rear support seat
131
and a pair of rear wheels
132
carried by the rear support seat
131
. The steering rod
14
has an upper grip portion
141
, and a lower pivot portion connected pivotally to the front support seat
121
by means of a pivot bolt
140
such that the upper grip portion
141
is rotatable relative to the front support seat
121
.
The conventional wagon
1
can be moved by manual operation of the steering rod
14
. For lack of a brake function, the conventional wagon
1
can hardly be retained in a stationary state when the conventional wagon
1
is disposed on a slope, thereby resulting in inconvenience and danger during use.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a wagon with a wheel braking device so as to ensure safety during use.
According to the present invention, a wagon comprises:
a cart body adapted for disposing goods thereon, the cart body having opposite front and rear ends, a bottom side, a front wheel unit mounted on the bottom side adjacent to the front end, and a rear wheel unit mounted on the bottom side adjacent to the rear end, the front wheel unit including a front support seat and a pair of front wheels carried by the front support seat, the rear wheel unit including a rear support seat and a pair of rear wheels carried by the rear support seat;
a pivot seat connected to the front support seat of the front wheel unit;
a steering rod having an upper grip portion, a lower coupling portion opposite to the upper grip portion, and an intermediate rod portion interconnecting the upper grip portion and the lower coupling portion and connected pivotally to the pivot seat such that the upper grip portion and the lower coupling portion are rotatable relative to the pivot seat; and
a wheel braking device including
a pair of brake plates, each of which is disposed rearwardly of a respective one of the rear wheels and has a first end portion connected pivotally to the rear end of the cart body, and a second end portion opposite to the first end portion, and
a transmission unit interconnecting the lower coupling portion of the steering rod and the second end portions of the brake plates;
the steering rod being operable so as to dispose the cart body in a selected one of a movable state, wherein the upper grip portion of the steering rod is pivoted away from the front end of the cart body, and the lower coupling portion of the steering rod moves toward the front end of the cart body such that the second end portions of the brake plates are moved by the transmission unit rearwardly and away from the rear wheels to prevent contact between the brake plates and the rear wheels, and a stationary state, wherein the upper grip portion of the steering rod is pivoted toward the front end of the cart body, and the lower coupling portion of the steering rod moves away from the front end of the cart body such that the second end portions of the brake plates are moved by the transmission unit forwardly and toward the rear wheels for braking the rear wheels, respectively.
REFERENCES:
patent: 809912 (1906-01-01), Ferris
patent: 988680 (1911-04-01), Wagner
patent: 1520941 (1924-12-01), Funk
patent: 1567922 (1925-12-01), De Spain
patent: 1701188 (1929-02-01), Miller
patent: 1715938 (1929-06-01), Miller
patent: 1785432 (1930-12-01), Beatty
patent: 2169781 (1939-08-01), Abresch
patent: 2389320 (1945-11-01), Nance
patent: 3313378 (1967-04-01), Freeman et al.
patent: 3486587 (1969-12-01), Malloy
patent: 3532188 (1970-10-01), Ketz
patent: 3551001 (1970-12-01), Wilson
patent: 4134599 (1979-01-01), DiMille et al.
patent: 4949986 (1990-08-01), Gohier
patent: 5531295 (1996-07-01), Kopman et al.
patent: 5735367 (1998-04-01), Brubaker
Ladas & Parry
Shin Yeh Enterprise Co., Ltd.
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