Guardrail support, attachment, and positioning block

• US 7,798,473 B2
• Filed: 06/26/2007
• Issued: 09/21/2010
• Est. Priority Date: 07/06/2004
• Status: Active Grant

• Current Assignee: KESS Incorporated
• Original Assignee: KESS Incorporated
• Inventors: King, David T.
• Primary Examiner(s): Ferguson; Michael P
• Application Number:
  US11/821,954
• Publication Number:
  US 20080290334A1
• Time in Patent Office: 1,183 Days
• Field of Search: 256/13.1, 404/6, 404/9
• US Class Current: 256/13.1
• CPC Class Codes: E01F 15/0438 Spacers between rails and posts, e.g. energy-absorbing means E01F15/0415 takes precedence

Abstract

A block used to space guardrails from support posts. The positioning or spacer block is a generally rectangular block having corded-out cavities to reduce weight and tabs or projections for cooperatively engaging the sides and top of a support post as well as the edges of the guardrail during roadway safety barrier system installation. Webbing within one or more of the cavities is used for additional structural support. The spacer block may be formed by low-pressure injection molding to optimize the strength to weight characteristics of the spacer block. The spacer block is formed from virgin and/or recycled plastic material and/or includes virgin or recycled rubber material, such as that obtained from the regrind of used tires, and/or another elastomeric materials from other sources.

Claims

1. A spacer block for attaching a guard rail to a post, comprising:

a pair of spaced apart opposing side walls having respective first ends and second ends;

a top panel extending between said first ends of said side walls;

a bottom panel extending between said second ends of said side walls;

said top panel, said bottom panel and said side walls forming a block member having a front face for cooperatively engaging said post and a rear face for cooperatively engaging said guard rail;

an engagement mechanism comprising at least one tab operably coupled to said top panel, said tab extending from said rear face of said spacer block for engaging said post and said tab including means operably coupled proximate a distal end of said tab and projecting downwardly for engaging a flange of said post;

at least one mounting bore extending there through said spacer block from said front face to said rear face for receiving a fastener to attach said spacer block to said guard rail;

an alignment mechanism comprising at least one tab operably coupled to and extending from said rear face of at least one side wall of said spacer block for maintaining lateral alignment of said spacer block on said post;

a resting mechanism comprising a tab projecting from said front face of said bottom panel for supporting a bottom edge of said guard rail thereon;

a notch formed in said rear face of said bottom panel and shaped to correspond to said tab of said resting mechanism for cooperative engagement of said resting mechanism of another said spacer block such that said spacer blocks may be positioned upon one another for storage; and

wherein said spacer block is composed of a polymeric material.

2. The spacer block of claim 1, wherein said means operably coupled proximate a distal end of said at least one tab of said engagement mechanism includes at least one finger projecting downwardly for engaging a flange of said post.

3. The spacer block of claim 1,wherein said engagement mechanism projecting member comprises two spaced apart fingers extending from a bottom surface of said at least one tab of said engagement mechanism forming a gap between said fingers and the rear face of the spacer block, the gap between the fingers operable to engage respective sides of a web on an I-beam support post.

4. The spacer block of claim 1, wherein said polymeric material is selected from the group consisting of a polyethylene, a polyvinylchloride, an ABS, an acetyl, an polypropylene oxide, a PUT a polycarbonate, a modified polyphenylene oxide, a polyester, a fiberglass filled SAN, an acrylic, an ethylene copolymer, an ionomer, and a polysulfone, a polypropylene, a polyethylene terephtalate, a nylon, a rubber, a polyurethane, polystyrene, and combinations thereof.

5. The spacer block of claim 1, wherein said spacer block comprises a thermoplastic and rubber composition.

6. The spacer block of claim 1, wherein said polymeric material comprises a rubber compound, an elastomeric compound, a natural rubber, a synthetic rubber, a virgin rubber, a regrind rubber material or combinations thereof.

7. The spacer block of claim 1, including a filler material selected from the group consisting of fiberglass, wood, calcium carbonate, and combinations thereof.

8. The spacer block of claim 1, wherein said side walls, said top panel and said bottom panel comprise a structural foam including a solid inner skin and a solid outer skin having a core of structural foam cells therebetween wherein said structural foam cells decrease in size from a center of said core toward said solid outer skin and toward said solid inner skin.

9. The spacer block of claim 8 wherein the density of said core of structural foam cells is greater near said solid inner skin and said solid outer skin than at a center position of said side walls between said solid inner skin and said solid outer skin.

10. The spacer block of claim 8, wherein said core of structural foam comprises cells comprises a solid content which increases from 30 percent in the center position to 100 percent at said solid inner skin and said solid outer skin.

11. The spacer block of claim 1, wherein an interconnection between said side walls, said top panel, and said bottom panel comprises rounded shoulders.

12. The spacer block of claim 1, wherein said front face is formed to correspond to the shape of a guard rail.

13. The spacer block of claim 12, wherein said shape comprises a webbed surface, a curved surface, a corrugated surface, and combinations thereof.

14. The spacer block of claim 1, wherein said rear face is concave or includes a longitudinal depression operable to fit around a portion of said post.

15. The spacer block of claim 1 wherein said spacer block includes webbing disposed between said top panel, said bottom panel, and said side walls for structural strength.

16. The spacer block of claim 1, wherein said spacer block includes impact absorbing material disposed within.

17. The spacer block of claim 16, wherein said impact absorbing material includes a cellular material, a gel, a liquid, and combinations thereof disposed therebetween.

18. The spacer block of claim 1, said side walls, said top panel and said bottom panel comprising a solid inner skin and a solid outer skin including a core comprising structural foam thermoplastic cells therebetween wherein the density of said core comprising structural foam cells increases from a center position of said core toward said solid inner skin and toward said solid outer skin.

19. The spacer block of claim 1 further comprising:

a medial wall disposed between the side-walls, the medial wall positioned generally perpendicular to the side-walls and generally parallel to the top and bottom panels;

the medial wall, top panel and side-walls forming a first cavity; and

the medial wall, bottom panel and side-walls forming a second cavity.

20. The spacer block of claim 19 further comprising at least one mounting bore traveling through the medial wall from the first face of the spacer block to the second face of the spacer block and the medial wall mounting bore operable to align with at least one mounting aperture on the post.

21. The spacer block of claim 1, wherein said rear face is concave operable to fit around a portion of said post.

22. The spacer block of claim 1, wherein said rear face includes a longitudinal depression operable to fit around a portion of said post.

23. A spacer block for attaching a guard rail to a post, comprising:

a pair of spaced apart opposing side walls having respective first ends and second ends;

a top panel extending between said first ends of said side walls;

a bottom panel extending between said second ends of said side walls;

said top panel, said bottom panel and said side walls forming a block member having a front face for cooperatively engaging said post and a rear face for cooperatively engaging said guard rail;

an engagement mechanism comprising a tab operably coupled to said top panel, said tab extending from said rear face of said spacer block for engaging said post and said tab including at least two spaced part fingers operably coupled proximate a distal end of said tab, the fingers extending from a bottom surface of said tab and forming a gap between said fingers and said rear face of said spacer block, the gap between said fingers operable to engage respective sides of a web of an I-beam support post and the gap between said fingers and said rear face of said spacer block operable to engage respective sides of a flange of the I-beam support post;

at least one mounting bore extending there through said spacer block from said front face to said rear face for receiving a fastener to attach said spacer block to said guard rail;

an alignment mechanism comprising at least one side tab or at least one side flange operably coupled to and extending from said rear face of at least one side wall of said spacer block for maintaining lateral alignment of said spacer block on said post; and

wherein said spacer block is composed of a polymeric material.

24. The spacer block of claim 23, said side walls comprising a solid inner skin and a solid outer skin including a core comprising structural foam cells therebetween wherein said cells decrease in size and said core increases in density from a center position of said core toward said solid inner skin and toward said solid outer skin.

25. The spacer block of claim 24 wherein said top panel, said bottom panel, said side walls, said first front face, and said second rear face further include a webbing having a core comprising said structural foam between a solid inner skin and a solid outer skin of said webbing.

26. The spacer block of claim 25, wherein the density of said structural foam is lowest in said foam core of said webbing and the density increases from the center of the foam core toward said outer solid skin and toward said inner solid skin of said webbing.

27. The spacer block of claim 24 further including webbing comprising at least one runner extending radially from a cylindrical reinforcing member intersecting with an interior surface of said top panel, said bottom panel and said side walls extending between void spaces formed in said spacer block, and said cylindrical reinforcing member being parallel to said side panels and top and bottom panels.