1. A rail fastener (10) for mounting a rail (12) to a support foundation (32), the rail (12) extends along a
first direction, said rail fastener (10) including:
a bottom plate (30) for engaging the support foundation (32);
a top plate (20) with rail-mounting engaging member (22) for engaging the rail (12);
a first elastomeric body (40) between the top plate (20) and the bottom plate (30) for supporting the top
plate (20) on the bottom plate (30);
characterized in that the rail fastener (10) further includes:
at least one pressing member (50) for pressing the top plate (20) towards the bottom plate (30) or
pressing the bottom plate (30) towards the top plate (20); and
wherein said top plate (20) has two opposing top plate ends (24) disposed along a second direction
perpendicular to the first direction and parallel to a plane of support foundation (32), and said pressing
member (50) presses the top plate (20) towards the bottom plate (30) at the respective two opposing
top plate ends (24), and the two opposing top plate ends (24) are offset with respect to a line parallel to
the second direction.
2. The rail fastener (10) as claimed in claim 1, wherein said pressing member (50) presses the top plate (20) towards the bottom plate (30) or presses the bottom plate (30) towards the top plate (20) through a second elastomeric body (60), said second elastomeric body (60) is between the top plate (20) and the pressing member (50), or the bottom plate (30) and the pressing member (50).
3. The rail fastener (10) as claimed in claim 1 or 2, wherein said pressing member (50) presses the top plate (20) towards the bottom plate (30).
4. The rail fastener (10) as claimed in claim 1, wherein said bottom plate (30) has two opposing bottom plate ends (34) disposed along the second direction, said two opposing bottom plate ends (34) are offset with respect to the line parallel to the second direction.
5. The rail fastener (10) as claimed in claim 4, wherein the bottom plate (30) is shaped to receive the top plate (20).
6. The rail fastener (10) as claimed in claim 5, wherein the two opposing top plate ends (24) are disposed on a line parallel to the second direction.
7. The rail fastener (10) as claimed in claim 4 or 5, wherein the pressing member (50) engages the respective two opposing bottom plate ends (34).
8. The rail fastener (10) as claimed in any one of claims 1 to 3 and 6, wherein the bottom plate (30) has two opposing bottom plate ends (34) disposed along the second direction, and the pressing member (50) engages the respective two opposing bottom plate ends (34).

9. The rail fastener (10) as claimed in claim 7, wherein the pressing member (50) and the opposing bottom plate ends (34) are secured by a bolt.
10. The rail fastener (10) as claimed in any of claims 4 to 6, wherein each of the two opposing top plate end (24) is rectangular-shaped having a length along the first direction, and the second elastomeric body (60) covers the entire said length.
11. The rail fastener (10) as claimed in any of claims 4 to 6, wherein each of the two opposing top plate end (24) is rectangular-shaped having a width along the second direction, and the second elastomeric body (60) covers a portion of said width.
12. The rail fastener (10) as claimed in any of claims 4 to 6, wherein each of the two opposing top plate end (24) is circular-shaped having a circumference, and the second elastomeric body (60) covers the entire said circumference.
13. The rail fastener (10) as claimed in any of claims 1, 2 and 4 to 6, wherein the top plate (20) has a top plate (20) bottom surface facing the bottom plate (30), and the entire said top plate (20) bottom surface is provided with the first elastomeric body (40).
14. The rail fastener (10) as claimed in any of claims 1, 2 and 4 to 6, wherein the top plate (20) has a top plate (20) bottom surface facing the bottom plate (30), and a portion of said top plate (20) bottom surface is provided with the first elastomeric body (40).
15. The rail fastener (10) as claimed in any of claims 1, 2 and 4 to 6, wherein the top plate (20) has a top plate (20) bottom surface facing the bottom plate (30), and the entire said top plate (20) bottom surface is not provided with the first elastomeric body (40).
16. A rail fastener (10) for mounting a rail (12) to a support foundation (32), the rail (12) extends along a first direction, said rail fastener (10) including:
a bottom plate (30) for engaging the support foundation (32);
a top plate (20) with rail- mounting engaging (22) member for engaging the rail (12), said top plate (20)
having two opposing top plate ends (24) disposed along a second direction perpendicular to the first
direction, and the two opposing top plate ends (24) are offset with respect to a line parallel to the
second direction;
a first elastomeric body (40) between the top plate (20) and the bottom plate (30) for supporting the top
plate (20) on the bottom plate (30);
characterized in that said bottom plate (30) has two opposing bottom plate ends (34) disposed along
the second direction, said two opposing bottom plate ends (34) are offset with respect to the line
parallel to the second direction.

17. A rail system having a rail fastener (10) of any one of claims 1 to 16.