Land vehicles – Wheeled – Extensible
Patent
1987-02-27
1989-01-24
Mitchell, David M.
Land vehicles
Wheeled
Extensible
280 3, 180 191, 180209, B62B 108
Patent
active
047996986
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an auxiliary support for the transport of car trailers or truck trailers which is mobile by having supporting wheels, has at its front end a drawbar for manual handling and propelling of the trailer and is connectable to the trailer that is to be moved.
2. Prior Art
An auxiliary support of this kind is known from U.S. Pat. No. 4,168,074. For connection to the trailer that is to be moved, this auxiliary support has a supporting rod which can be fastened with the aid of a strap to the drawbar of the trailer that is to be moved.
To use this known auxiliary support it is, therefore, necessary that on the trailer that is to be moved a corresponding fastening strap be provided on the drawbar. It is furthermore disadvantageous that this strap can scarcely prevent a lateral tilting away of the auxiliary support, since, by reason of the slight height dimensions of the drawbar of the trailer, the supporting rod of the auxiliary support is connected virtually only at a point to the drawbar.
SUMMARY OF THE INVENTION
The object of the invention consists, therefore, in providing a hand-propelled support enabling simple and easy handling accompanied by the greatest possible security against overturning of the auxiliary support.
This problem is solved by the auxiliary support having two wheels carried by an axle and arranged on opposite sides, respectively, of a hitch post carried by the axle and having a ball on its upper end for connection to the ball socket of the trailer.
An outrigger wheel is located in spaced relationship from the axle. Advantageously the outrigger wheel is arranged adjustably on the auxiliary support for shifting toward and away from the axle.
The outrigger wheel is mounted detachably on the auxiliary support and the outrigger wheel is mounted on the auxiliary support for swiveling about a perpendicular axis in all directions.
Preferably the length of the hitch post is variable pneumatically or mechanically.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a plan of an auxiliary support.
FIG. 2 is a section of the auxiliary support taken along line 2--2 of FIG. 1.
FIG. 3 is a section through a portion of the auxiliary support taken on line 3--3 of FIG. 2.
FIG. 4 is a side elevation of another embodiment of the auxiliary support and FIG. 5 is a similar view showing the auxiliary support equipped with an outrigger wheel.
FIG. 6 is a side elevation of an auxiliary support with a hydraulically adjustable length hitch post, parts being broken away.
FIG. 7 is a side elevation of an auxiliary support with a mechanically adjustable length hitch post, parts being broken away.
DETAILED DESCRIPTION
In accordance with FIGS. 1 to 3, an auxiliary support has an axle 17, on the opposite ends of which two wheels 5 are rotatably mounted, respectively. A drawbar 3 is connected to the axle. In the case of the FIG. 4 embodiment the drawbar 7 is of fixed length, whilst in the embodiment of FIG. 1 the length of the drawbar 3 is adjustable. The end of drawbar 3 remote from axle 17 carries a handle 4 for pulling the auxiliary support.
As FIGS. 1 to 3 further show, a hitch post 1 projects upward from the central portion of the axle 17 and has mounted on its upper end a ball 2 for connection to the ball socket of a trailer.
As FIG. 4 more especially shows, for attaching the auxiliary support to a trailer, the drawbar 7 is swung upwardly in the direction opposite to the arrow designated 6, so that the ball 9 mounted on the upper end of the post 1' can be pushed manually under the ball socket 8 of the trailer (not shown). By swinging the drawbar in the direction designated by the arrow 6, the ball 9 is fitted into the ball socket 8, so that the trailer can be hand-propelled by pulling and pushing on the drawbar 7.
The auxiliary support shown in FIG. 4, can be equipped with an outrigger wheel 13 shown in FIG. 5, which is connected to the auxiliary support at the side of the axle 17 opposite drawbar 7, in any of various positions spaced differen
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Beach Robert W.
Brown Ward
McGiehan Donn
Mitchell David M.
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