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Publication numberUS3784312 A
Publication typeGrant
Publication dateJan 8, 1974
Filing dateJun 12, 1972
Priority dateJun 12, 1972
Publication numberUS 3784312 A, US 3784312A, US-A-3784312, US3784312 A, US3784312A
InventorsGordon D
Original AssigneeUs Navy
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flotation beam for matting construction
US 3784312 A
Abstract
Lightweight box beams filled with a plastic foam provide buoyancy for support matting in marshy or low bearing terrain. The beams have a substantially square or rectangular shaped cross section and connectors are placed on each beam to permit facile connection to other beams and to permit paneling to be attached thereto. Landing pads would be the most common use for the beams of this invention, but they can be used for a multitude of purposes.
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Claims  available in
Description  (OCR text may contain errors)

United States Patent [1 1 Gordon Jan. 8, 1974 [5 FLOTATION BEAM FOR MATTING 3,385,183 5/1968 Kortz 404/35 3,557,503 1/197] Snyder 1 52/586 3,557,670 1/1971 Sutton 404/35 [75] Inventor. Donald T. Gordon, Oxnard, Calif. [73] A h U t d st t fA FOREIGN PATENTS OR APPLICATIONS ssigneez e n1 e a es 0 merlca as v represented y the Secretary of the 1,048,554 11/1966 Great Britain 404/35 Navy, Washington, DC. M P J Primary Examinerarion arsons, r. [22] Flled: June 1972 Attorney-Richard S. Sciascia [21] Appl. No.: 261,761

[57] ABSTRACT 2% 404/35 52/ 3 23 38 Lightweight box beams filled with a plastic foam pro- [58] Fn id "21.61/35 36 43 Vide buoyancy for Support matting in marshy or low 1 0 582 bearing terrain. The beams have a substantially square or rectangular shaped cross section and connectors are placed on each beam to permit facile connection [56] References cued to other beams and to permit paneling to be attached UNITED STATES PATENTS thereto. Landing pads would be the most common use 776,419 11/1904 Flatt 404/43 for the beams of this invention, but they can be used 2,407,059 9/1946 Crafton 404/35 for a multitude of purposes, 3,348,459 10/1967 Harvey 1 404/35 3,379,104 4/1968 Scholl 404/35 2 Claims, 5 Drawing Figures 1 F LOTATION BEAM FOR MATTING CONSTRUCTION BACKGROUND OF THE INVENTION 1. Field of the Invention The present inventon relates toconstruction flotation beams and more particularly to flotation beams used for matting construction.

2. Description of the Prior Art In low bearing terrain including marshes, swamps and mud, buoyancy must be provided to support normal construction operations. One method of constructing in such low bearing terrain is to sink bearing poles into the soil and build platforms on top thereof. This method is frequently unacceptable due to the requirements for large, cumbersome pile driving equipment.

Another method in low bearing terrains used is to provide large, buoyant structures such as barges or flotation tanks upon which construction may occur. A drawback in this method is that panels which interconnect the barges or tanks are too cumbersome and the panel connecting means is inadequate to provide a base suitable for construction thereon.

SUMMARY OF THE INVENTION The present invention comprises a lightweight box beam filled with a plastic foam to provide buoyancy for support paneling or matting in low bearing terrain. The beams have a substantially square or rectangularshaped cross section and connectors are positioned on each beam to allow end-to-end connections and to allow paneling to be attached thereon. The invention may be used for a multitude of purposes, but most frequently it is used for aircraft landing platforms.

STATEMENT OF THE OBJECTS OF THE INVENTION An object of the present invention is to provide a lightweight box beam having a plastic foam filler therein, said beam suitable to provide buoyancy for support paneling in low bearing terrain.

Another object is to provide such a beam which is economical in use and successful in application.

Other objects, advantages and novel features of the invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings wherein:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the invention with a panel about to be emplaced.

FIG. 2 is a side view showing in detail the manner of connecting a panel to the beam of the present invention.

FIG. 3 is a perspective viewof the finished platform with different sizes of panels connected to the beams of this invention. I

FIG. 4 is'a perspective view of a finished platform with widely spaced beams.

FIG. 5 is a perspective view of the connectors on each end of the beam of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, it will be seen that the in- 2 10 is filled with a plastic foam 12 to provide enhanced buoyancy thereto. Connectors 24 and 26 are positioned on each end of beam 10 to allow end-to-end connections therebetween while connectors 14 allow panels 16 to be attached to the top thereof substan tially, as shown in FIGS. 2 and 3.

A variety of panel connectors 14 may be mounted on the top side of beam 10 but the preferred type, as illustrated-in U. S. Pat. No. 3,385,183, involves a combination male-female keylock arrangement adapted to mate with either the male or female panel connectors 18 and 20 respectively, as shown in FIGS. 1 and 2. The beams 10 are also connected at each end by mating male and female bayonet connectors 24 and 26 respectively, illustrated in FIG. 5. Other types of beam connectors may also be used if required. The support panels 16 are laid parallel to the longitudinal axis of beams 10 and through their connectors 18 and 20, the panels are attached to the top surface of the beams. The panels may be of varied length. As a specific example, beam 10 with a one foot square cross-section, a length of 8 feet, a A inch wall thickness and with polyurethane foam filler would provide about 5 inches of bearing surface for the panels 16 which would provide a finished platform 22 for helicopter or VTOL aircraft. Because of the buoyancy of beams 10, platform 22 would easily float and would be suitable for use in low bearing terram.

For operations requiring lower strength, fewer beams 10 would be required and the panels 16 could be positioned with their longitudinal axis spanning the additional distance between beams 10. In this arrangement,

the panels 16 would be provided with connectors 18 and 20 on each end for attachment to the male-female connection 14 mounted on the top of beam 10. Such a platform would be suitable for lower strength applications such as artillery emplacements and the like.

Obviously'many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed is: r

l. A landing mat for providing support'in low bearing terrain comprising:

a plurality of cellular box beams filled with polyurethane foam to increase the buoyancy thereof positioned endto-end and in a number of parallel rows; each beam having a male bayonet connector on one end and a female bayonet connector on the opposite end with the male bayonet connector of one beam engaging the female bayonet connector of the adjacent beam so that the beams are connected end-to-end;

a male-female keylock panel connector mounted on the top of each box beam;

a plurality of support panels positioned contiguously on top of the box beams; said panels having a female keylock engaging the male keylock of the panel connector on a beam in one row and a male keylock, on the opposite side of the support panel from the female keylock, engaging the female keylock of the panel connector on a beam in the next adjacent parallel row whereby the support panels form a continuous platform.

2. The landing mat as defined in claim 1 wherein:

the box beams are one foot in cross-section with a length of 8 feet, a one-quarter inch wall thickness and said beams filled with polyurethane foam filler.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US776419 *Oct 21, 1903Nov 29, 1904Charles H PlattPavement.
US2407059 *Sep 29, 1943Sep 3, 1946Robertson Co H HPortable launching and landing mat for airplanes
US3348459 *Jan 3, 1967Oct 24, 1967Harvey Aluminum IncInterlocking matting and coupling bar therefor
US3379104 *Mar 15, 1966Apr 23, 1968Navy UsaConnection means for landing mat sections
US3385183 *Oct 22, 1965May 28, 1968Harvey Aluminum IncKeylock-typical section
US3557503 *Jul 3, 1968Jan 26, 1971Butler Manufacturing CoWall panel structure and method of making same
US3557670 *May 27, 1968Jan 26, 1971Sutton Paul ThomasPatch assembly for rapid repair of bomb-damaged runways and pavements
GB1048554A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4488833 *Apr 27, 1982Dec 18, 1984Kaiser Aluminum & Chemical CorporationRapidly deployed assault vehicle surfacing or trackway system
US5050361 *Dec 29, 1988Sep 24, 1991Hallsten Supply CompanyDeck structure
US5261205 *Feb 7, 1990Nov 16, 1993Sandor Frederick JMethods and apparatus for fabricating plastic block panels
US5279088 *Jan 17, 1992Jan 18, 1994Heydon Building Systems International, LimitedWall structure and method of forming the same
US5325646 *Aug 20, 1992Jul 5, 1994Hallsten Supply Co.Tank cover structure
US5505031 *May 4, 1994Apr 9, 1996Heydon Building Systems, Inc. Of CaliforniaBuilding structure and method of use
US5617677 *Jul 1, 1994Apr 8, 1997Hallsten CorporationTank or channel cover
WO1996001348A1 *Jun 28, 1995Jan 18, 1996Hallsten CorpTank or channel cover
Classifications
U.S. Classification404/35, 52/309.11
International ClassificationE01C9/00, E01C3/00, E01C9/08, E02D27/04
Cooperative ClassificationE02D27/04, E01C9/08, E01C3/006
European ClassificationE01C3/00C, E02D27/04, E01C9/08