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Publication numberUS3903702 A
Publication typeGrant
Publication dateSep 9, 1975
Filing dateMay 8, 1973
Priority dateMay 9, 1972
Also published asDE2323162A1
Publication numberUS 3903702 A, US 3903702A, US-A-3903702, US3903702 A, US3903702A
InventorsAppleton Samuel Alan
Original AssigneeDytap Constr Holding
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Revetment structure
US 3903702 A
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Description  (OCR text may contain errors)

United States Patent 1 1 Appleton [4 1 Sept. 9, 1975 REVETMENT STRUCTURE [75] Inventor: Samuel Alan Appleton, Taunton,

[21] Appl. No.: 358,310

[30] Foreign Application Priority Data May 9, 1972 United Kingdom 21600/72 [52] US. Cl. 61/37; 52/608; 404/41 [51] Int. Cl. E02b 3/12 [58] Field of Search 61/37, 38, 35; 404/34, 404/41, 39, 37, 29; 52/608, 609, 590

[56] References Cited UNITED STATES PATENTS 708,470 9/1902 Flood 52/590 928,320 7/1909 Moore 52/590 1,040,117 10/1912 Bates 52/590 1,379,440 5/1921 Brainerd 404/34 2,047,882 7/1936 McPherson 52/608 2,662,343 12/1953 Rice 404/34 3,347,048 10/1967 Brown et al. 61/37 FOREIGN PATENTS OR APPLICATIONS 465,097 8/1951 Italy 52/606 676,764 8/1952 United Kingdom 404/34 520,563 4/1940 United Kingdom 404/34 456,670 4/1950 52/608 Primary Examiner--Robert L. Wolfe Assistant ExaminerAIex Grosz Attorney, Agent, or Firm-Norris & Bateman [5 7] ABSTRACT The invention provides a system of interfitting concrete units for surfacing revetments or other ground liable to erosion. Each unit is provided with cavities to retain earth on the finished surface and has a special outline shape such that opposite longitudinal sides are reflections of each other. This is claimed to avoid any tendency for the units to rotate when subjected to stresses in the finished structure. The units may optionally be provided with sockets into which dowels may be fitted to further prevent dislodgement of any one unit.

3 Claims, 6 Drawing Figures PATENTED SEP 9|975 sum 1 BF 9 PATENTED 9|975 sum 3 o 9 REVETMENT STRUCTURE This invention relates to building materials suitable for the construction of revetments for the protection of slopes from erosion and for the formation of hardstandings and other earth surfacings, e.g. for vehicles.

It has previously been proposed to face ground surfaces with a matrix of interfitting masonry units provided with cavities which retain earth to give a natural appearance. Known interiitting units intended for this purpose have however, not found widespread demand and this is believed to be due to (a) high cost of manufacture (b) necessity for the costly process of grouting or otherwise fixing the blocks together to prevent dislodgement and (c) tendency for the blocks or joints between the blocks to dislodge or fracture during assembly or when the finished structure is subjected to shear forces in and perpendicular to the plane of the structure.

It is an aim of this invention to provide a novel combination of features which reduce the severity of the aforementioned problems and enable stable surfacings to be assembled quickly and inexpensively.

According to the invention, there is provided a masonry unit whose edges have laterally projecting and depressed recess portions arranged to interfit with corresponding portions on identical units to form an interfitting structure and which are formed with cavities to retain earth on the finished structure, one lingitudinal edge of the unit being a reflection of the other longitudinal edge about a longitudinal axis of the unit.

By providing opposite longitudinal edges as reflections of each other any tendancy for the block to rotate and become dislodged when subjected to shear forces is reduced.

The raised and depressed portions are preferably simple 'V or U shapes and are optionally provided with sockets adapted to receive linking members for transmitting forces between the units in a direction perpendicular to the plane of the finished structure thereby reducing the possibility of dislodgement. The Linking members may take the form of short dowels each tapered from a central position towards its ends and they fit into correspondingly tapered sockets in the masonry units.

A preferred construction is a concrete moulding formed by interconnected ribs defining cavities between them. By providing the ribs with a taper towards the upper or front faces of the units the area of concrete exposed on the finished surface after the cavities have been filled with earth is minimized. The tapered shape of the ribs also facilitates striking the units out of their moulds during manufacture.

Each longitudinal edge has a laterally projecting portion centrally located on one half thereof and a laterally recessed portion centrally located on the other half. This particular outline shape, the exact nature of which will become more apparent from the following description has been found to be particularly satisfactory with regard to forming a stable and flexible mattress on the ground surface.

By constructing the unit so that the shorter sides are approximately equal in length (after allowing for a joint thickness) to the said sections it is possible to assemble a revetment having some of the blocks at right angles to the others. This can be an advantage when finishing the edges of the revetment.

In order that the units may engage in a proper manner all the raised and depressed portions are of a similar shape which can advantageously be a shallow V or U. If a V shape is used it preferably defines an angle within the range of about 140 to for maximum strength combined with effectiveness in the transmission of shear forces.

The invention will now be particularly described by way of example with reference to the accompanying drawings in which:

FIG. 1 is a perspective view from above of an exemplary embodiment of the invention.

FIG. 2 is a view from underneath of the embodiment shown in FIG. 1;

FIG. 3 is an elevation of the far end of the embodiment as shown in FIG. 1;

FIG. 4 and 5 are plan views of alternative embodiments; and

FIG. 6 shows an assembly of blocks all constructed in accordance with the invention.

Referring to FIGS. 1, 2 and 3 there is shown a generally rectangular precast concrete unit whose top face I is defined by a latticework of interconnected slightly tapered ribs which serve to retain soil on the finished revetment. The exact formation of the ribs is not a critical feature and possible alternative designs are shown in FIGS. 4 and 5.

Cavities 2 are provided between the ribs with further spaces 3 on the longer edges and corners of the unit. These spaces 2 and 3 all extend through the entire thickness of the unit.

Lateral projections 4 and depressions 5, all have a similar V shape are spaced around the unit as shown and it is notable that the basic outline is symmetrical about the longitudinal axis X X (see FIG. 2). In particular the longitudinal edges of the unit are reflections one of the other about the X X axis. This symmetry enables identical units to be assembled in staggered relationship and also reduces tendency for the unit to turn when subjected to stresses in the finished structure.

Each of the two longer sides can be divided into two sections of length plus a joint thickness j between the two sections as shown on FIG. 2 and this dimension k) is equal to the length of each of the shorter sides. The advantage of this will be apparent from FIG. 6 which shows how one of the units can be fitted at right angles to the others. It should be noted that FIG. 6 is intended only to show the laying pattern of the blocks and does not show the internal cavities.

It is not essential for the spaces or cavities between the ribs to penetrate completely through the units and in one possible construction the spaces extend only through one quarter of the thickness of the unit.

As will be seen from FIGS. 1 and 2, each laterally projecting and laterally recessed portion 4 and 5 is provided with a socket in the form of a small tapered hole. To give improved stability in the finished structure small dowels (not shown) of nylon or other similar synthetic material are inserted into these sockets during assembly. The dowels are tapered to co-act with the taper of the sockets and may be constructed so as to separate each block slightly from the next to give added flexibility.

What we claim is:

l. A revetment or earth facing structure laid directly on the earth comprising a plurality of interfitting units to form a flexible mattress and including means defining cavities therethrough which are filled with said earth to stabilize and retain said revetment on said earth, said units being similar to one another, said units interlocking after assembly to substantially minimize rotative shifting of units adjacent any units subjected to a rotative, shifting force caused by earth movement, each of said units being of generally rectangular configuration and being formed by a series of interconnected ribs which taper towards the upper face of said unit,

a point of the recess nearest the axis, the projections and recesses interfitting with recesses and prpjections respectively of identical units to form said revetment, the projections and recesses on one said edge being reflections in the axis of the projections and recesses respectively of the other edge, the projections and recesses of said each of said units being provided with sockets receiving linking members for transmitting forces between adjacent units in a direction perpendicular to the plane of said revetment, whereby any heaving or shifting in the earth with resultant movement of units adjacent any one unit will cause substantially only nonrotative shifting of such one unit thereby substantially negating breaking up of the interfitting structure of the identical units forming said revetment.

2. A Revetment Structure according to claim 1 in which the projections and recesses are V shaped.

3. A Revetment Structure according to claim 1 in which the projections and recesses are U shaped.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US708470 *Feb 26, 1902Sep 2, 1902William L WeberTile.
US928320 *Jan 20, 1908Jul 20, 1909Herbert C MooreTile.
US1040117 *Dec 29, 1911Oct 1, 1912Edward T BatesSurface-covering.
US1379440 *Jul 29, 1920May 24, 1921Brainerd Frank EPaving-block
US2047882 *Feb 25, 1936Jul 14, 1936Mcpherson John EMasonry wall
US2662343 *Jun 30, 1950Dec 15, 1953Rice Robert SPavement providing for plant growth
US3347048 *Sep 27, 1965Oct 17, 1967Coastal Res CorpRevetment block
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4067196 *Oct 9, 1975Jan 10, 1978Paul SchraudenbachDecorative stone
US4067197 *Jul 20, 1976Jan 10, 1978Paul RitterMeans for stabilizing soil
US4227829 *Nov 29, 1978Oct 14, 1980Landry Jr Kossuth JSoil erosion prevention blocks
US4326817 *Feb 22, 1980Apr 27, 1982Boiardi Mario JPaving stone and walkway formed therewith
US4370075 *Oct 28, 1980Jan 25, 1983Nicolon CorporationRevetment grids and mats
US4875803 *Jul 18, 1988Oct 24, 1989Scales Michael JBlock-formed revetment system for controlling soil erosion
US4896996 *Jan 23, 1989Jan 30, 1990Mouton William JWave actuated coastal erosion reversal system for shorelines
US4998844 *Jan 30, 1990Mar 12, 1991Charles C. Garvey, Jr.Wave actuated coastal erosion reversal system for shorelines
US5102048 *Aug 31, 1990Apr 7, 1992Bohnhoff William WIrrigation head support
US5108219 *Dec 14, 1990Apr 28, 1992Hair Roberta AInterlocking paving stone
US5123778 *Sep 26, 1990Jun 23, 1992Bohnhoff William WMethod of paving
US5201843 *Feb 11, 1992Apr 13, 1993Hair Roberta AInterlocking paving stone for open drainage ground cover pattern
US5244303 *Apr 16, 1992Sep 14, 1993Hair Roberta AInterlocking paving stone
US5250340 *Sep 9, 1991Oct 5, 1993Bohnhoff William WMat for stabilizing particulate materials
US5429451 *Apr 30, 1993Jul 4, 1995Pettee, Jr.; Gary K.Grid matrix system including interconnected revetment blocks
US5645369 *Dec 3, 1994Jul 8, 1997Geiger; PeterPlate-shaped paving stone, in particular made of concrete
US5988942 *Mar 11, 1997Nov 23, 1999Stewart Trustees LimitedErosion control system
US6508607May 21, 2001Jan 21, 2003Lee A. SmithErosion control block adapted for use with cellular concrete mattresses
US6558074Jul 19, 2001May 6, 2003Jan Erik JanssonAssembly of revetments with crush-absorbing ribs
US6592292Nov 14, 2002Jul 15, 2003Jan Erik JanssonFlexible bolt and assembly of concrete revetments employing same
US6739797 *Oct 12, 2000May 25, 2004Thomas W. SchneiderInterlocking erosion control block with integral mold
US6857244Dec 6, 2002Feb 22, 2005F. Von Langsdorff Licensing LimitedCast stone for fixing exterior traffic surfaces
US6863472Nov 1, 2002Mar 8, 2005Jan Erik JanssonRevetment useful to line stream bed and assembly of said revetments
US6866446Feb 5, 2002Mar 15, 2005Lee Masonry Products, LlcRevetment block and mat
US6898906 *Sep 24, 2001May 31, 2005Andreas DrostFloor covering element consisting of artificial stone material and set of floor covering elements
US6942420 *Aug 5, 2003Sep 13, 2005F. Von Langsdorff Licensing Limitedhaving a basic shape corresponding to a unification of several square basic elements, in particular an angular ground covering element comprising projections and recesses all around its circumference; especially for outdoors
US7144201Mar 25, 2004Dec 5, 2006Dearmond Jr Thomas HStructure and method for supporting headstones and other stonelike objects
US7210876May 20, 2005May 1, 2007National Diversified Sales, Inc.Rollable load bearing mat for turf areas
US7220078Jul 26, 2005May 22, 2007F.Von Langsdorff Licensing LimitedGround covering elements of artificial stone material
US8609215Sep 25, 2012Dec 17, 2013Keystone Retaining Wall Systems LlcIrregular tessellated building units
US8726595 *Dec 20, 2012May 20, 2014Keystone Retaining Wall Systems LlcIrregular building units having mating sides
US8747019May 30, 2013Jun 10, 2014Oldcastle Building Products Canada, Inc.Artificial flagstone for providing a surface with a natural random look
US20110180452 *Jan 25, 2010Jul 28, 2011Mattel, Inc.Display Assembly
WO1981003512A1 *May 27, 1981Dec 10, 1981Knudsen PA revetment for protecting the inclined surfaces of beaches,shores,rivers or channels,and of structures such as moles,dikes or channel walls,located in these places,against erosion by waves and flowing water
WO1981003514A1 *May 27, 1980Dec 10, 1981Landry KSoil erosion prevention blocks
WO1990001088A1 *Jul 14, 1989Feb 8, 1990Michael J ScalesBlock-formed revetment system for controlling soil erosion
U.S. Classification405/20, 404/41, 52/608, D25/115
International ClassificationE01C9/00, E02B3/14
Cooperative ClassificationE02B3/14, E01C9/004
European ClassificationE01C9/00D, E02B3/14