Static structures (e.g. – buildings) – Conical or radially ribbed cover
Patent
1990-05-04
1991-11-19
Chilcot, Jr., Richard E.
Static structures (e.g., buildings)
Conical or radially ribbed cover
52 80, E04B 700
Patent
active
050655540
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a shell structure, comprising an elongated housing section and two gables which join the housing section and whose bottom edges define an opening in the shell structure, and the use of such shell structures as dugouts.
BACKGROUND OF THE INVENTION
This type of a shell structure has several applications, in civilian application as underground cellars, public shelters, storages, and the like. In military application, such shell structures can be used as dugouts.
For example, U.S. Pat. No. 3,968,603 describes prefabricated metal buildings consisting of a plurality of individual U-shaped building elements, which are connected with each other, and the like, by means of clamps or other suitable fasteners. Reinforcing web structures are necessary to stabilize the buildings. Erecting such buildings requires specific tools, is time consuming and requires considerable labor. Due to their enormous weight, these structures cannot be moved from one place to another as a whole. These structures must be dismantled for this purpose, which again requires specific tools, and is time and labor consuming.
SUMMARY OF THE INVENTION
It is therefore an object of this invention to provide a multi-purpose shell structure which satisfies the following requirements. The shell structure is simple to manufacture, comprises a single body, is light and easily stackable. It can also be erected without special tools or special equipment. According to another object, a shell structure of the present invention is watertight and thus can be used either as an above-ground shelter structure or an underground dugout structure.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to achieve these objects a shell structure according to the characterizing part of claim 1 is provided.
Other preferred embodiments of the invention are set forth in the dependent claims 2 to 4. According to independent claim 5, the use of the shell structure as a dugout is provided.
The invention will now be described in more detail in the following specification with reference made to an embodiment shown in the accompanying drawings. In the drawings
FIGS. 1 and 2 are perspective views of a shell structure of the invention as seen from the outside,
FIG. 3 is also a perspective view but shows the interior of a shell structure,
FIG. 4 shows a shell structure as seen towards one of the gables
FIGS. 5 and 6 illustrate the application of a shell structure as a dugout, and
FIGS. 7 and 8 illustrate the application of a shell structure as a pontoon and a bridge.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
Referring particularly to FIGS. 1-4, a shell structure comprises an elongated cylindrical housing section 1 having a parabolically shaped cross-section. The housing section is trough-like and provided with gables 2 and 3. A first gable 2 includes an opening 4 in which is fitted a watertightly closeable door or hatch 5. The edges of elements 1-3 define an opening 6 into the shell structure (FIG. 3). Running along the rim of opening 6 is a flange-shaped reinforcement 7. Both housing section 1 and each gable 2 and 3 are made of a corrugated sheet material. The sheet form has been achieved by using in reinforced plastic technology, laminating together layers of plastic and reinforced plastic upon a reinforced plastic mould matching the shape of a shell structure. Particularly, when manufacturing a shell structure of reinforced plastic, a corrugated structure can provide highly preferred strength values. Housing section 1 is provided with corrugations 8 which are perpendicular to the longitudinal direction of the housing section; such corrugations are made vertical when a shell structure is positioned with opening 6 against the ground. Similarly, the gables have corrugations 9 positioned substantially perpendicularly to the gable edge, so that they lie in a substantially vertical position when a shell structure lies with opening 6 against the ground. It should be particularly noted that corrugations 8 and 9 in housin
REFERENCES:
patent: 2423832 (1949-02-01), Gearon
patent: 2460662 (1947-07-01), Van Voorhis
patent: 2897668 (1959-08-01), Graham
patent: 3154888 (1964-11-01), Graham
patent: 3902288 (1975-09-01), Knudson
patent: 3968603 (1976-07-01), Merson
Lindberg Ralf
Neva Pertti
Chilcot Jr. Richard E.
Smith Creighton
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