Patent Application
20090200108
This subject invention relates to a platform for a height reducible electronics enclosure and, more generally, to a platform or dock for any vehicle or structure.
The military uses shelter enclosures on vehicles such as HMMWVs for many different applications. One type of shelter is height reducible so that it can be driven on or off of a cargo plane (e.g., a C 130 cargo plane) without having to remove the shelter from the truck. The door of such an enclosure is 70″ inches off the ground. Therefore, some type of a ladder or stairway is required for easier access into the shelter. Also, in some configurations, a protective entrance is desired adjacent the door to the enclosure in case of a chemical attack. A platform is thus required for the protective entrance and a stairway or ladder is required to access the platform.
The design constraints for a platform and stairway or ladder are fairly severe. For example, the platform must fold up and be locked in place when the vehicle is driven away during road march. The platform must also fold open to allow for quick deployment. Hydraulic systems and the like are generally not favored since they add to the complexity, weight, and cost of the shelter system. Also, the ladder and platform or stairway cannot interfere with the raising and lowering of the top half of the shelter. A single person must be able to deploy and fold the platform down quickly and easily.
No known systems meet these requirements.
It is therefore an object of this invention to provide a new platform for a truck mounted shelter enclosure.
It is a further object of this invention to provide such a platform which can be used in connection with a height reducible electronics enclosure.
It is a further object of this invention to provide such a platform which includes bracketry to stow and mount a ladder.
It is a further object of this invention to provide such a platform which is configured to accommodate a protective entrance in the event of a chemical attack.
It is a further object of this invention to provide such a platform which folds up (road march) and folds down (deployment) quickly and easily.
It is a further object of this invention to provide such a platform which can be folded and deployed quickly and easily by one person.
It is a further object of this invention to provide such a platform which does not require hydraulic or similar systems for folding or deployment.
It is a further object of this invention to provide such a platform which folds and deploys independent of the operation of the height reducible electronics enclosure.
It is a further object of this invention to provide such a platform which can be used in connection with other vehicles and/or can be attached to other structures.
The subject invention results from the realization that a better platform for a vehicle is engineered to fold up (road march) and fold down independent of and without interfering with the operation of the height reducible enclosure and, in one embodiment, includes a torsion/bending bar assembly to more easily fold and deploy the platform.
The subject invention features an entrance module for a height adjustable enclosure with a top portion movable with the respect to a bottom portion. The preferred entrance module comprises a hingedly attached platform movable between a stowed folded position and a deployed unfolded position. A locking assembly releasably locks the platform in the folded position independent of the position of the top movable part of the shelter. The preferred locking assembly includes a rail attached to the top movable portion of the shelter, one of a female and a male portion of a lock attached to and slideable along the rail, and the other of the female and the male portion of the lock attached to the platform.
In one example, the male portion includes a rod affixed to and slideable with respect to the platform and the female portion includes a bracket with an orifice for receiving the rod therethrough. Preferably, the platform is hingedly attached via a torsion bar assembly. One torsion bar assembly example includes a plurality of bars constrained on one end to rotate with the platform and constrained on the other end to remain fixed as the platform rotates. Typically, the bars of the torsion bar assembly extend between two spaced hubs. One hub includes a non-circular orifice therethrough for receiving a non-circular crank which rotates with the platform.
The entrance module may include at least one cable support tie connected on one end to the portion of the lock slideable along the rail and attached on the other end to the platform. The entrance may also include a ladder for the platform. Typically, the ladder is removable from the platform and stowable under the platform. The entrance module may further include at least one safety railing foldable with respect to the platform. The entrance module may further include a protective entrance positionable on the platform.
The subject invention also features a dock for a vehicle. A platform is hingedly attached to the vehicle and is movable between a stowed folded position and a deployed unfolded position. A torsion bar assembly includes a plurality of bars constrained on one end to rotate with the platform and constrained on the other end to remain fixed as the platform rotates. In one embodiment, the bars of the torsion bar assembly extend between two spaced hubs. One hub includes a non-circular orifice therethrough for receiving a non-circular crank which rotates with the platform. Also included is a locking assembly for releasably locking the platform in the folded position.
One dock for a vehicle includes a platform, spaced first and second brackets for mounting to the vehicle, and spaced first and second ears on the platform rotatably mounted to the first and second brackets, respectively. A torsion bar assembly includes a plurality of rods fixed on one end to a first hub and fixed on an opposite end to a second hub. The first hub is fixed with the respect to the first bracket. The second hub includes a crank receptacle and a crank is fixed to the second ear and received in the crank receptacle so the second hub is constrain to rotate with the platform.
The subject invention, however, in other embodiments, need not achieve all these objectives and the claims hereof should not be limited to structures or methods capable of achieving these objectives.
Other objects, features and advantages will occur to those skilled in the art from the following description of a preferred embodiment and the accompanying drawings, in which:
Aside from the preferred embodiment or embodiments disclosed below, this invention is capable of other embodiments and of being practiced or being carried out in various ways. Thus, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. If only one embodiment is described herein, the claims hereof are not to be limited to that embodiment. Moreover, the claims hereof are not to be read restrictively unless there is clear and convincing evidence manifesting a certain exclusion, restriction, or disclaimer.
In one example, torsion/bending bar assembly 80,
The combination of bending and torsion provided by torsion/bending bar assembly 80 lowers the sheer stress of the rods 82 as the platform is lowered. Sheer stress is reduced because the rods bend and twist while the platform is being lowered. Also, the oval crank design associated with crank 96 eliminates stress concentration points.
Slow and effortless deployment of the platform is affected via torsion bar assembly 80,
Note, however, that the embodiment disclosed above is only one specific embodiment. In other embodiments, the invention hereof may function as a folding dock or platform for a vehicle or other structure and include only a platform and a torsion bar assembly. Aspects of the design discussed above could be implemented on any tactical electronics enclosure or shelter system where a stowable platform is desired. It would also be of value in commercial applications where a heavy tailgate or platform is used and simple, single-person deployment is required. When used in connection with a shelter system, the platform of the subject invention operates independent of the shelter position. The integrated torsion/bending bars mitigate platform weight during stowage and emplacement operations. The ovalized torsion interface reduces stress concentrations permitting the use of standard materials (e.g., aluminum and steel). The platform is designed for a single person emplacement operation from ground level by a 5th to a 95th percentile operator. The integrated latching mechanisms provides a lateral load constraint to ensure that the load path travels through the shelter and not through the platform. The platform also features the ability to stow the ladder or stair as discussed above. The preferred platform is designed to be compatible with an M-14 protective entrance.
Although specific features of the invention are shown in some drawings and not in others, this is for convenience only as each feature may be combined with any or all of the other features in accordance with the invention. The words “including”, “comprising”, “having”, and “with” as used herein are to be interpreted broadly and comprehensively and are not limited to any physical interconnection. Moreover, any embodiments disclosed in the subject application are not to be taken as the only possible embodiments. Other embodiments will occur to those skilled in the art and are within the following claims.
In addition, any amendment presented during the prosecution of the patent application for this patent is not a disclaimer of any claim element presented in the application as filed: those skilled in the art cannot reasonably be expected to draft a claim that would literally encompass all possible equivalents, many equivalents will be unforeseeable at the time of the amendment and are beyond a fair interpretation of what is to be surrendered (if anything), the rationale underlying the amendment may bear no more than a tangential relation to many equivalents, and/or there are many other reasons the applicant can not be expected to describe certain insubstantial substitutes for any claim element amended.
