Fire escape – ladder – or scaffold – Ladder with land vehicle
Reexamination Certificate
1999-11-18
2001-06-26
Stodola, Daniel P. (Department: 3634)
Fire escape, ladder, or scaffold
Ladder with land vehicle
C414S462000, C224S310000
Reexamination Certificate
active
06250425
ABSTRACT:
This invention relates to ladders and more specifically to ladders supported on vehicles for moving the ladders during use.
BACKGROUND OF THE INVENTION
Ladders are often required when attempting to reach the tops of trees or lower locations to, for example, pick its fruit, or to conduct maintenance such as spraying and pruning, particularly walnuts etc. When there are numerous trees as in an orchard, it often becomes cumbersome to continually have to move the ladder from tree to tree to enable the worker to pick its fruit. It would therefore be desirable to provide an apparatus which allows for quick and easy movement of a ladder from tree to tree.
There have been proposed various structures attached to vehicles to support a ladder. Reference may be made to U.S. Pat. Nos. 5,236,062, 4,113,055, 4,614,252 and 4,909,352. These references show, for instance, ladders attached to the rear of vehicles as well as ladders placed in the bed of a truck. These references further disclose a ladder support structure where the ladder is physically attached to the structure itself and is moved from location to location by the vehicle. Such proposed structures require a specific vehicle and ladder, and a separate ladder for other uses, thereby increasing costs for the orchard owner.
It is desired to provide a versatile ladder and vehicle configuration which will permit the vehicle and ladder to be used together or separately.
SUMMARY OF THE INVENTION
Accordingly, the present invention provides a ladder support rack, which can be attached to the front end of a wheeled vehicle which is capable of supporting a ladder that is not physically affixed to the structure itself.
In particular, the current invention provides a ladder support rack structure, which is attached to the front end of a vehicle, such as a tractor, which is capable of supporting a standard ladder that is not physically mounted to the support structure itself and can readily be removed therefrom. This creates the advantage of enabling the user to use any size or type of ladder as dictated by the type of job being done. Another advantage of the current invention is that the support structure is easily disassembled for storage and to enable one to use the motor vehicle for other tasks that does not include the need for a ladder.
Other advantages of the invention may become apparent to those skilled in the art from the following detailed description, taken in conjunction with the figures and the appended claims.
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Barnes Walter P.
Emilio Carlo
Marshall O'Toole Gerstein Murray & Borun
Stodola Daniel P.
Thompson Hugh B.
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