Decorative stone

Claim 2

A stone for use in forming a soil erosion preventing revetment having a plurality of stones 7 comprising at least two parallel rib members spaced from each other, at least two parallel crosspiece members spaced from each other extending transversely to said rib members and interconnecting at least the respective ends thereof, said rib members including end portions projecting beyond said crosspiece members at the point of connection therewith, said crosspiece members including end portions projecting beyond said rib members at the point of connection therewith, end surfaces on said end portions of said ribs and crossbars being formed with substantially corresponding projections and recesses alternating with each other on all sides of said stone and also from each side to the adjacent side so that said end portions on each side of said stone may be joined to end portions on any side of an adjacent stone, and at least one extension portion provided on said rib members and said crosspiece members disposed between the projecting end portions of said crosspiece members and between the projecting end portions of said rib members, said extension portions being shorter than said end portions so as not to interfere with the joining of the end portions of one stone with those on another stone, whereby undermining of the hollow space defined between said crosspiece members, and said rib members is prevented.

Claim 3

A stone according to claim 1, wherein said extension portions each terminate in an end face which extends parallel to a vertical plane in which said crosspiece members and said rib members extend.

Claim 4

A stone according to claim 1, wherein projections and recesses are formed by boundary surfaces extending vertically to an upper surface of the stone.

Claim 5

A stone according to claim 1, wherein said extension portions are eccentrically disposed between said projecting end portions of said crosspiece members and said rib members.

Claim 6

A stone according to claim 4, wherein a crosspiece section member is provided extending parallel to said crosspiece members and spaced therefrom, said crosspiece section member extending between and being connected to said rib members to define two openings in the stone separated by said crosspiece section member.

Claim 7

A stone according to claim 5, wherein said crosspiece section member is disposed midway between said spaced crosspiece members.

Claim 8

A stone according to claim 1, wherein a crosspiece section member is provided extending parallel to said crosspiece members and spaced therefrom, said crosspiece section member being extended between and connected to said rib members, and wherein a rib section member is provided extending parallel to said rib members and spaced therefrom, said rib section member extending between and connected to said crosspiece members, said crosspiece section member and said rib section member defining with said crosspiece members and said rib members four openings in the stones separated by said crosspiece section member and said rib section member.

Claim 9

A stone according to claim 7, wherein said extension portions are disposed midway between said projecting end portions of said crosspiece members and said rib members.

Claim 10

A stone according to claim 8, wherein said extension portions are formed as extensions of said crosspiece section member and said rib section member.

Claim 11

A stone according to claim 1, wherein a crosspiece section member is provided extending parallel to said crosspiece members and spaced therefrom, said crosspiece section member extending between and being connected to said rib members, and wherein a rib section member is provided extending parallel to said rib members and spaced therefrom, said rib section member extending from one of said crosspiece members to said crosspiece section member, said crosspiece members, said rib members, said crosspiece section members and said rib section members defining three openings in the stone separated by said crosspiece section member and said rib section member.

Claim 12

A stone according to claim 10, wherein some of said extension portions are formed as extensions of said crosspiece section member.

Claim 13

A stone according to claim 11, wherein at least one of said extension portions is formed as an extension of said rib section member.

Claim 14

A stone according to claim 12, wherein said rib section member is disposed midway between said spaced rib members.

Claim 15

A stone according to claim 1, wherein said rib members have a length which is twice the length of said crosspiece members.

Claim 16

A stone according to claim 14, wherein a rib section member is provided extending parallel to said rib members and spaced therefrom, said rib section member extending between and being connected to said rib members, and wherein at least two crosspiece section members are provided extending parallel to said crosspiece members and spaced therefrom, one of said crosspiece section members extending between and being connected with one of said rib members and said rib section member, the other of said crosspiece section members extending between and being connected with the other of said rib members, said crosspiece section members being spaced from each other and defining with said crosspiece members, said rib members and said rib section member forming four openings in the stone separated by said crosspiece section members and said rib section member.

Claim 17

A stone according to claim 15, wherein said extension portions provided between said projecting end portions are eccentrically disposed with respect to said end portions.

Claim 18

A stone according to claim 16, wherein said projections are V-shaped tongues and said recesses are V-shaped grooves having a configuration coordinated to said tongues, and wherein at least one additional projection and one additional recess is provided on each of said rib means spaced from each other.

Claim 19

A stone according to claim 17, wherein said additional recess is formed on an extension of said crosspiece section members.

Claim 20

A stone according to claim 18, wherein at least two extension portions are provided on each of said rib means.

Claim 21

A stone according to claim 19, wherein one of said at least two extension portions on each of said rib means is disposed between said projecting end portions of one of said crosspiece members and said groove means formed as an extension of said crosspiece section members.

Claim 22

A stone according to claim 20, wherein the other of said at least two extension portions on each of said rib means is disposed between said projecting end portions of the other of said crosspiece members and said additional tongue means provided on each of said rib members.

Claim 23

A stone according to claim 14, wherein two additional crosspiece members are provided extending parallel to said crosspiece members and spaced therefrom and from each other, said additional crosspiece members extending between said rib members and connected thereto, and wherein two rib section members are provided extending parallel to said rib members and spaced therefrom, each of said rib section members extending between a respective one of said pair of crosspiece members and one of said additional crosspiece members, said rib members, said crosspiece members and said rib section members defining five openings in the stone separated by said two rib section members and said additional rib members.

Claim 24

A stone according to claim 22, wherein at least two extension portions are provided on said rib members.

Claim 25

A stone according to claim 23, wherein one of said at least two extension portions is disposed between the projecting end portion of one of said pair of crosspiece members and said projecting end portion of one of said additional crosspiece members.

Claim 26

A stone according to claim 24, wherein the other of said at least two extension portions is disposed between the projecting end portion of the other of said pair of crosspiece members and the projecting end portion of the other of said additional crosspiece members.

Claim 27

A stone according to claim 25, wherein said extension portions provided on said crosspiece members are disposed midway between said projecting end portions of said rib members.

Claim 28

A stone according to claim 26, wherein said extension portions on said crosspiece members are formed as extensions of said rib section members.

Claim 29

A stone according to claim 14, wherein all of said crosspiece members including said additional crosspiece members are provided with end portions projecting beyond said rib members, and having complementary projections and recesses alternating with each other on each side of the stone so that they may be joined on any side to any side of an adjacent stone.

Claim 30

A stone according to claim 28, wherein said additional crosspiece members are provided with end portions projecting beyond said rib members, said last-mentioned projecting end portions being provided with means for facilitating the interconnection with other stones.

Claim 31

A stone according to claim 29, wherein at least two extension portions are provided on said rib members.

Claim 32

A stone according to claim 30, wherein one of said at least two extension portions is disposed between the projecting end portion of one of said pair of crosspiece members and said projecting end portion of one of said additional crosspiece members.

Claim 33

A stone according to claim 31, wherein the other of said at least two extension portions is disposed between the projecting end portion of the other of said pair of crosspiece members and the projecting end portion of the other of said additional crosspiece members.

Claim 34

A stone according to claim 32, wherein said extension portions provided on said crosspiece members are disposed midway between said projecting end portions of said rib members.

Claim 35

A stone according to claim 14, wherein at least one rib section member is provided extending parallel to said rib members and spaced therefrom, said rib section member extending between said crosspiece members and connected thereto, a first pair of crosspiece section members extending parallel to said crosspiece members and spaced therefrom and from each other, said first pair of crosspiece section members extending between said rib section member and one of said rib members, a second pair of crosspiece section members extending parallel to said crosspiece members and spaced therefrom and from each other, said second pair of crosspiece section members extending between said rib section member and the other of said rib members, said rib members, said crosspiece members, said rib section member and said crosspiece section members defining six openings in the stone separated by said crosspiece section members and said rib section member.

Claim 36

A stone according to claim 34, wherein at least two extension portions are provided on said rib members.

Claim 37

A stone according to claim 35, wherein one of said at least two extension portions on each of said rib means is disposed between a projecting end portion of one of said crosspiece members and said tongue means formed on said crosspiece section member.

Claim 38

A stone according to claim 36, wherein the other of said at least two extension portions on each of said rib means is disposed between a projecting end portion of the other of said crosspiece members and said additional groove means provided on each of said rib members.

Claim 39

A stone according to claim 37, wherein said extension portions provided on said crosspiece members are disposed midway between said projecting end portions of said rib members.

Claim 40

A stone according to claim 38, wherein said extension portions on said crosspiece members are formed as extensions of said rib section member.

Claim 41

A stone according to claim 39, wherein said extension portions on said crosspiece members are disposed midway between the projecting end portions of said rib members.

Claim 42

A stone for use in forming a soil erosion preventing revetment having a plurality of stones comprising: a pair of parallel rib members spaced from each other, a pair of parallel crosspiece members spaced from each other and extending transversely to said rib members and interconnecting the respective ends thereof such that said parallel rib members and said parallel crosspiece members define at least one opening therebetween, said pair of rib members including end portions projecting beyond said crosspiece members at the point of connection therewith, said pair of crosspiece members including end portions projecting beyond said rib members at the point of connection therewith, said projecting end portions of said rib members and said crosspiece members alternately having end surfaces formed with projections and recesses, said projections and recesses alternating on each side and from each side to its adjacent sides so that any side of the stone may be interengaged with any side of a further stone and being arranged such that when the stone is arranged with further stones, a hollow space is defined between adjacent stones, with at least one extension portion extending into the hollow space provided on said rib members and said crosspiece members disposed between the projecting end portions of said crosspiece members and between the projecting end portions of said rib members to prevent an undermining of the of the hollow space defined between adjacent stones.

Claim 43

A stone for use in forming a soil erosion preventing revetment having a plurality of stones comprising: a pair of parallel rib members spaced from each other, a pair of parallel crosspiece members spaced from each other and extending transversely to said rib members and interconnecting the respective ends thereof such that said parallel rib members and said parallel crosspiece members define at least one opening therebetween, said pair of rib members including end portions projecting beyond said crosspiece members at the point of connection therewith, said pair of crosspiece members including end portions projecting beyond said rib members at the point of connection therewith, said projecting end portions of said rib members and said crosspiece members alternately having end surfaces formed with projections and recesses, said projections and recesses alternating on each side and from each side to its adjacent sides so that any side of the stone may be interengaged with any side of a further stone and being arranged such that when the stone is arranged with further stones, a hollow space is defined between adjacent stones, with at least one extension portion extending into the hollow space provided on said rib members and said crosspiece members disposed between the projecting end portions of said crosspiece members and between the projecting end portions of said rib members to prevent an undermining of the of the hollow space defined between adjacent stones.

Claim 44

A stone according to claim 41, wherein said extension portions are eccentrically disposed between said projecting end portions of said crosspiece members and said rib members.

Claim 45

A stone according to claim 41, wherein a crosspiece section member is provided extending parallel to said crosspiece members and spaced therefrom, said crosspiece section member extending between and being connected to said rib members to define two openings in the stone separated by said crosspiece section member.

Claim 46

A stone according to claim 43, wherein said crosspiece section member is disposed midway between said spaced crosspiece members.

Claim 47

A stone according to claim 44, wherein said extension portions are eccentrically disposed between said projecting end portions of said crosspiece members and said rib members.

Claim 48

A stone according to claim 44, wherein said extension portions are formed as extensions of said crosspiece section member and said rib section member.

Claim 49

A revetment useful in preventing soil erosion, having a plurality of stones, each stone comprising at least two parallel rib members spaced from each other, at least two parallel crosspiece members spaced from each other extending transversely to said rib members and interconnecting at least the respective ends thereof, said rib members including end portions projecting beyond said crosspiece members at the point of connection therewith, said crosspiece members including end portions projecting beyond said rib members at the point of connection therewith, end surfaces on said end portions of said ribs and crossbars being formed with substantially corresponding projections and recesses alternating with each other on all sides of said stone and also from each side to the adjacent side so that said end portions on each side of said stone may be joined to end portions on any side of an adjacent stone, and at least one extension portion provided on said rib members and said crosspiece members disposed between the projecting end portions of said crosspiece members and between the projecting end portions of said rib members, said extension portions being shorter than said end portions so as not to interfere with the joining of the end portions of one stone with those on another stone, whereby undermining of the hollow space defined between adjacent stones is prevented.

Claim 50

A revetment useful in preventing soil erosion, having a plurality of stones, each stone comprising at least two parallel rib members spaced from each other, at least two parallel crosspiece members spaced from each other extending transversely to said rib members and interconnecting at least the respective ends thereof, said rib members including end portions projecting beyond said crosspiece members at the point of connection therewith, said crosspiece members including end portions projecting beyond said rib members at the point of connection therewith, end surfaces on said end portions of said ribs and crossbars being formed with substantially corresponding projections and recesses alternating with each other on all sides of said stone and also from each side to the adjacent side so that said end portions on each side of said stone may be joined to end portions on any side of an adjacent stone, and at least one extension portion provided on said rib members and said crosspiece members disposed between the projecting end portions of said crosspiece members and between the projecting end portions of said rib members, said extension portions being shorter than said end portions so as not to interfere with the joining of the end portions of one stone with those on another stone, whereby undermining of the hollow space defined between adjacent stones is prevented.

Claim 51

A revetment useful in preventing soil erosion, having a plurality of stones, each stone comprising: a pair of parallel rib members spaced from each other, a pair of parallel crosspiece members spaced from each other and extending transversely to said rib members and interconnecting the respective ends thereof such that said parallel crosspiece members define at least one opening therebetween, said pair of rib members including end portions projecting beyond said crosspiece members including end portions projecting beyond said rib members at the point of connection therewith, said projecting end portions of said rib members and said crosspiece members alternately having end surfaces formed with projections and recesses, said projections and recesses alternating on each side and from each side to its adjacent sides so that any side of the stone may be interengaged with any side of a further stone and being arranged such that, when the stone is arranged with further stones, a hollow space is defined between adjacent stones, with at least one extension portion extending into the hollow space provided on said rib members and said crosspiece members disposed between the projecting end portions of said crosspiece members and between the projecting end portions of said rib members to prevent an undermining of the hollow space defined between adjacent stones.

Claim 52

A revetment useful in preventing soil erosion, having a plurality of stones, each stone comprising: a pair of parallel rib members spaced from each other, a pair of parallel crosspiece members spaced from each other and extending transversely to said rib members and interconnecting the respective ends thereof such that said parallel crosspiece members define at least one opening therebetween, said pair of rib members including end portions projecting beyond said crosspiece members including end portions projecting beyond said rib members at the point of connection therewith, said projecting end portions of said rib members and said crosspiece members alternately having end surfaces formed with projections and recesses, said projections and recesses alternating on each side and from each side to its adjacent sides so that any side of the stone may be interengaged with any side of a further stone and being arranged such that, when the stone is arranged with further stones, a hollow space is defined between adjacent stones, with at least one extension portion extending into the hollow space provided on said rib members and said crosspiece members disposed between the projecting end portions of said crosspiece members and between the projecting end portions of said rib members to prevent an undermining of the hollow space defined between adjacent stones.