Square embossed roof and rib plate

• US 7,284,933 B2
• Filed: 06/09/2003
• Issued: 10/23/2007
• Est. Priority Date: 06/07/2002
• Status: Expired due to Term

• Current Assignee: FCI Holdings Delaware, Inc.
• Original Assignee: Jennmar Corporation (Frank Calandra, Inc.)
• Inventors: Stankus, John C., Brandon, Demrey G., Eaton, Jack R., Calandra, Frank Jr., Stewart, Eugene H.
• Primary Examiner(s): SAFAVI, MICHAEL
• Application Number:
  US10/457,840
• Publication Number:
  US 20040018062A1
• Time in Patent Office: 1,597 Days
• Field of Search: 405/288, 405/302.1, 405/259.1, 405/259.2, 405/259, 524/08, 524/10, 411/545, 411/531, D83/99, 428/582, 428/595, 428/599, 428/130, 428/126, 428/177, 299/11
• US Class Current: 405/302.1
• CPC Class Codes: E21D 11/155 Laggings made of strips, slats, slabs or sheet piles longitudinal struts for mine arches E21D11/28
• CPC Class Codes: E21D 21/0086 Bearing plates
• CPC Class Codes: Y10T 428/24653 Differential nonplanarity at margin

Abstract

Disclosed is a mine roof and rib support system generally including a square bearing plate. A through hole is positioned near a center portion of the square bearing plate. A peripheral section at least partially circumscribes the bearing plate. In between the through hole and the peripheral section is a rib member area. The rib member area may include two rib members with a convex cross-section connected by a substantially linear surface member disposed between the two rib members, two or more concave ribs with a substantially linear surface member disposed between the two rib members, or two substantially linear surfaces connected by a convex rib member. A safety edge surrounds the square bearing plate. The safety edge may be a rolled edge, a looped edge, a folded edge, or another comparable edge. Also disclosed is a method for making the mine roof and rib support system.

Claims

1. In a mine roof support system of the type having a bearing plate, a mine roof bolt passing through the bearing plate and one end of the roof bolt securely mounted in bore hole in the mine roof, wherein the mine roof bolt positions the bearing plate to the mine roof, the improvement comprising:

the bearing plate, comprising;

a first major surface;

an opposite second major surface;

end connecting the first and second major surfaces, the end positioned over one of the major surfaces, and spaced from the perimeter of the bearing plate; and

a hole in center portion of the bearing plate and extending through the first and second major surfaces of the bearing plate, wherein the mine roof bolt is received through the hole; and

at least one rib member area disposed between the hole and the perimeter and circumscribing the hole, wherein the at least one rib member area comprises;

at least one continuous rib member circumscribing the hole and a flat continuous surface area defined as a linear surface member circumscribing the rib member.

2. The mine roof support system according to claim 1, wherein the at least one rib member area includes two rib members, wherein each of the rib members circumscribes the hole and one of the rib members circumscribes the other one of the rib members and the linear surface member is between and separates the two rib members.

3. The mine roof support system according to claim 2, wherein each of the two rib members has a convex cross-sectional shape.

4. The mine roof support system according to claim 2, wherein each of the two rib members has a concave cross-sectional shape.

5. The mine roof support system according to claim 1, wherein the linear surface member is a first linear surface member and the at least one rib member area includes a second linear surface member circumscribing the hole, wherein the rib member circumscribes the second linear surface member.

6. The mine roof support system according to claim 5, wherein the rib member has a convex cross-sectional shape.

7. The mine roof support system according to claim 1, wherein the end over one of the major surfaces and spaced from the perimeter of the bearing plate comprises a continuous safety edge formed around the perimeter of the bearing plate, the safety edge selected from the group consisting of a rolled safety edge, a looped safety edge, and a folded safety edge.

8. The mine roof support system according to claim 7, wherein the continuous safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides inner surface of the looped edge and the surface portion of the second major surface provides outer surface of the looped portion, and the end faces the surface portion of the second major surface adjacent the perimeter of the bearing plate.

9. The mine roof support system according to claim 7, wherein the continuous safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides outer surface of the looped edge and the surface portion of the second major surface provides inner surface of the looped portion, and the end faces the surface portion of the first major surface adjacent the perimeter of the bearing plate.

10. The mine roof support system according to claim 2, wherein the end over one of the major surfaces and spaced from the perimeter of the bearing plate comprises a continuous safety edge formed around the perimeter of the bearing plate, the safety edge selected from the group consisting of a rolled safety edge, a looped safety edge, and a folded safety edge.

11. The mine roof support system according to claim 10, wherein the continuous safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides inner surface of the looped edge and the surface portion of the second major surface provides outer surface of the looped portion, and the end faces the surface portion of the second major surface adjacent the perimeter of the bearing plate.

12. The mine roof support system according to claim 10, wherein the continuous safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides outer surface of the looped edge and the surface portion of the second major surface provides inner surface of the looped portion, and the end faces the surface portion of the first surface adjacent the perimeter of the bearing plate.

13. The mine roof support system according to claim 5, wherein the end over one of the major surfaces and spaced from the perimeter of the bearing plate comprises a continuous safety edge formed around the perimeter of the bearing plate, the safety edge selected from the group consisting of a rolled safety edge, a looped safety edge, and a folded safety edge.

14. The mine roof support system according to claim 13, wherein the continuous safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides inner surface of the looped edge and the surface portion of the second major surface provides outer surface of the looped portion, and the end faces the surface portion of the second major surface adjacent the perimeter of the bearing plate.

15. The mine roof support system according to claim 13, wherein the continuous safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides outer surface of the looped edge and the surface portion of the second major surface provides inner surface of the looped portion, and the end faces the surface portion of the first major surface adjacent the perimeter of the bearing plate.

16. In a mine roof support system of the type having a bearing plate, a mine roof bolt passing through the bearing plate and having one end of the roof bolt securely mounted in bore hole in the mine roof, wherein the mine roof bolt positions the bearing plate to the mine roof, the improvement comprising:

the bearing plate comprising;

a first major surface;

an opposite second major surface;

an end connecting the first and second major surfaces, the end positioned over one of the major surfaces and spaced from the perimeter of the bearing plate to provide a safety edge formed around the perimeter of the bearing plate; and

a hole in center portion of the bearing plate and extending through the first and second major surfaces of the bearing plate, wherein the mine roof bolt is received through the hole.

17. The mine roof support system according to claim 16 wherein, the safety edge is selected from the group consisting of a rolled safety edge, a looped safety edge, and a folded safety edge.

18. The mine roof support system according to claim 17, wherein the safety edge is a rolled safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides inner surface of the rolled edge and the surface portion of the second major surface provides outer surface of the rolled portion, and the end faces the surface portion of the first major surface.

19. The mine roof support system according to claim 17, wherein the safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second maj or surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides inner surface of the looped edge and the surface portion of the second maj or surface provides outer surface of the looped portion, and the end faces the surface portion of the second major surface adjacent the perimeter of the bearing plate.

20. The mine roof support system according to claim 17, wherein the safety edge is a looped safety edge and the first major surface at the safety edge has a surface portion and the second major surface at the safety edge has a surface portion, wherein the surface portion of the first major surface provides outer surface of the looped edge and the surface portion of the second major surface provides inner surface of the looped portion, and the end faces the surface portion of the first major surface adjacent the perimeter of the bearing plate.

21. The mine roof support system according to claim 17, wherein the safety edge is a folded safety edge and the first major surface at the safety edge has a surface portion having a first segment and a second segment, and the second major surface at the safety edge has a surface portion having a first segment and a second segment, wherein the first segment of the surface portion of the first major surface faces in an opposite direction to the second segment of the surface portion of the first major surface, and the first segment of the surface portion of the second major surface is in facing relationship to the second segment of the surface portion of the second major surface.