Undertaking – Portable coffin casings
Reexamination Certificate
1999-09-20
2001-09-04
Dayoan, B. (Department: 3628)
Undertaking
Portable coffin casings
C052S135000, C264S256000
Reexamination Certificate
active
06282763
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to burial containers and methods for forming same and is particularly concerned with burial container having a seamless single piece double wall base and lid forming hollow chambers therein, the interior side of each double wall having a coarse aggregate fused thereto to bond with a flowable structural material such as concrete or foam introduced into the formed chambers for additional structural strength and/or weight.
2. Description of the Prior Art
Concrete burial vaults are porous and thus, under soil load pressure, will eventually permit the flow of moisture into the vault interior. Attempts have been made to line such vaults with plastic or fiberglass shells, however the continued pressure of soil load will eventually cause moisture to move through pores of the concrete and separate the interior shell from the concrete to which it was originally adhered.
A number of approaches have been taken to cover or shroud concrete burial vaults with plastic in order to provide a better barrier to the flow of matter into the vault interior. These approaches for the most part are directed to a technique for adhering the liner to the concrete interface. See for example U.S. Pat. No. 3,439,461 (Chandler) which describes the application of a wet and tacky adhesive onto the surfaces of a plastic liner placed on a mold for filing with concrete so that the adhesive and the concrete will cure together and be bonded at the interface. While this is an improvement in previous techniques, there is still a tendency for the liner to separate from the concrete and permit the entry of moisture.
U.S. Pat. No. 3,839,768 (McQuestion) seeks to overcome the manufacturing steps required to use adhesive as the adhering means at the plastic to concrete interface by attaching fiberglass loops to the surfaces of a resinous liner so that when the mold is filled with concrete, the loops will be embedded in the concrete. This has been successful to a degree, however the manufacturing process is involved and costly.
U.S. Pat. No. 4,060,581 (Darby) is directed to overcome the problem arising when some of the wet and tacky adhesive pre-applied to the surfaces of a plastic liner is scrubbed away when the concrete is poured into the mold. It calls for adhering aggregate to surfaces of the plastic liner so that when the mold is filled with concrete and the concrete cured, the pre-applied aggregate provides the adhering means at the plastic to concrete interface.
While these approaches have resulted in improvements in vault construction, there is still a need for a more efficient and less costly manufacturing operation and a more secure bonding between the container surface and the concrete interface. It is to this need that the present invention is directed.
SUMMARY AND OBJECTIVES OF THE INVENTION
The present invention is a burial vault and a method for forming the burial vault preferably by simple rotational molding wherein a seamless single piece base is formed having inner and outer walls that create a hollow chamber capable of being filled with a flowable structural material. The lid is formed in the same manner. During the molding process, a coarse aggregate of a harder form of the molding substance is introduced into the mold so that it becomes fused to the interior surface of the inner and outer walls of the base and lid upon completion of the molding. The fused coarse aggregate thereby provides for flowable concrete to bond mechanically to the flowable structural material to form a rigid and inseparable junction.
From the summary, it can be seen that a primary objective of the present invention is to provide a burial container which may be produced by simple rotational molding and filling techniques which do not require adhesive binding agents, special climate controls, and precise manufacturing procedures combining various elements to form an ultimate defined structure.
Another objective of the present invention is to provide a new and improved seamless hollow wall burial container, the lid and base of which are light in weight can be readily handled and transported economically over substantial distances and can be filled at the grave site or centrally established locations with a structural flowable material.
Still a further objective of the present invention is to provide a molded double wall structure concrete interface that will not separate or become loose when exposed to moisture and pressure.
Thus there has been outlined the more important features of the invention in order that the detailed description that follows may be better understood and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto. In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the arrangement of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. It is also to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting in any respect. Those skilled in the art will appreciate that the concept upon which this disclosure is based may readily be utilized as a basis for designing of other structures, methods and systems for carrying out the several purposes of the development. Examples of other uses of the present inventive concept include ice coolers, water coolers, food coolers, boats and any other article utilizing a double wall construction which need additional structural strength or weight.
It is important the claims be regarded as including such equivalent processes and products resulting therefrom that do not depart from the spirit and scope of the present invention. The application is neither intended to define the invention of the application, which is measured by its claims, nor to limit its scope in any way. Thus, the objectives of the invention set forth above, along with the various features of novelty which characterize the invention, are noted with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific results obtained by its use, reference should be made to the following detailed specification taken in conjunction with the accompanying drawings wherein like characters of reference designate like parts throughout the several views.
REFERENCES:
patent: 3439461 (1969-04-01), Chandler et al.
patent: 3839768 (1974-10-01), McQuestion
patent: 4060581 (1977-11-01), Darby et al.
patent: 4261083 (1981-04-01), Darby et al.
patent: 4314390 (1982-02-01), Darby et al.
patent: 5245733 (1993-09-01), Goria
patent: 5321873 (1994-06-01), Goria
Dayoan B.
Miller William L.
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