K rail end cap

Abstract

A K rail end cap is fixed to ends of the K rails to repair chipped K rails or protect the ends of undamaged K rails. The caps are preferably a plastic material or the like, are between 0.093 inches and 0.125 inches thick, and about 9 inches deep. The caps slip over the top, sides, and bottom of the K rail ends, and may be glued in place. An opening in the face of the caps exposes metal loops at each end of the K rails to allow connection of consecutive K rails after the caps are attached.

Claims

1. A K rail cap, comprising: a face having substantially a same shape as a cross-section of a K rail; a skirt reaching back from the face and including a top and sides and configured to slide over an end of a K rail enclosing an end of the K rail; an vertical connecting feature opening in the face to access connecting features on ends of the K rails; and a recessed access opening reaching from the vertical opening to the top to allow a rod to be inserted vertically down through the connecting features of two consecutive K rails to connect the two consecutive K rails.

2. The K rail cap of claim 1, wherein the skirt is sized to provide about a 0.22 inch clearance around the K rail end for glue and to accommodate manufacturing variations in the K rails.

3. The K rail cap of claim 1, wherein the top of the skirt is angled up above the horizontal an angle A from vertical, reaching back from the face of the K rail cap.

4. The K rail cap of claim 3, wherein the top of the skirt is angled up about one degree above the horizontal reaching back from the face of the K rail cap.

5. The K rail cap of claim 1, wherein the K rail cap is between 0.093 and 0.130 inches thick.

6. The K rail cap of claim 5, wherein the K rail cap is 0.130 inches thick.

7. The K rail cap of claim 1, wherein the K rail cap is about 32.7 inches high, about 24.7 inches wide at the bottom, and about 6.7 inches wide at the top.

8. The K rail cap of claim 7, wherein the K rail cap has a tapered top portion with a height of about 19.4 inches and tapered at an angle of about 6 degrees and a tapered bottom portion below the top portion and having a height of about 10.2 inches and tapered at an angle of about 35 degrees.

9. The K rail cap of claim 1, wherein the connecting feature opening has a height of about 24.25 inches and a width of about 4.5 inches.

10. The K rail cap of claim 1, wherein the K rail cap is made of plastic.

11. The K rail cap of claim 1, wherein the K rail cap is made of High Density Polyethylene (HDPE).

12. A capped K rail, comprising: a concrete K rail comprising: a length; a height of about 32 inches; a bottom width of about 24 inches; a top of about 6 inches; a top portion tapered at about 6 degrees from the vertical; a bottom portion below the top portion and tapered at about 35 degrees from the vertical; opposite ends; and two connecting loops embedded in each end of the K rail; a K rail cap made of plastic and glued to one of the ends of the K rail and comprising: a face having substantially a same shape as a cross-section of the K rail; a skirt reaching back from the face and including a top and sides and configured to slide over an end of a K rail enclosing an end of the K rail; an vertical connecting feature opening in the face to access connecting features on ends of the K rails; and a recessed access opening reaching from the vertical opening to the top to allow a rod to be inserted vertically down through the connecting features of two consecutive K rails to connect the two consecutive K rails; wherein the K rail cap has a clearance sufficient to slide the K rail cap over the K rail and glue the K rail cap to the K rail.

13. The K rail cap of claim 12, wherein the skirt is sized to provide about a 0.22 inch clearance around the K rail end for glue and to accommodate manufacturing variations in the K rails.

14. The K rail cap of claim 12, wherein the K rail cap is made of High Density Polyethylene (HDPE) plastic.

15. A capped K rail, comprising: a concrete K rail comprising: a length; a height of about 32 inches; a bottom width of about 24 inches; a top of about 6 inches; a top portion tapered at about 6 degrees from the vertical; a bottom portion below the top portion and tapered at about 35 degrees from the vertical; opposite ends; and two connecting loops embedded in each end of the K rail; a K rail cap made of High Density Polyethylene (HDPE) and glued to one of the ends of the K rail and comprising: a face having substantially a same shape as a cross-section of the K rail; a skirt reaching back from the face and including a top and sides and configured to slide over an end of a K rail enclosing an end of the K rail, the skirt sized to provide about a 0.22 inch clearance around the K rail end for glue and to accommodate manufacturing variations in the K rails; an vertical connecting feature opening in the face to access connecting features on ends of the K rails; and a recessed access opening reaching from the vertical opening to the top to allow a rod to be inserted vertically down through the connecting features of two consecutive K rails to connect the two consecutive K rails; wherein the K rail cap has a clearance sufficient to slide the K rail cap over the K rail and glue the K rail cap to the K rail.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) The above and other aspects, features and advantages of the present invention will be more apparent from the following more particular description thereof, presented in conjunction with the following drawings wherein:

(2) FIG. 1A is a front view of a K rail cap according to the present invention.

(3) FIG. 1B is a side view of the K rail cap according to the present invention.

(4) FIG. 2A is a front-side isometric view of the K rail cap according to the present invention.

(5) FIG. 2B is a rear-side isometric view of the K rail cap according to the present invention.

(6) FIG. 3 shows a K rail without a K rail cap according to the present invention.

(7) FIG. 4A shows a first detailed view of an end of the K rail.

(8) FIG. 4B shows a second detailed view of an end of the K rail.

(9) FIG. 5 shows the K rail caps on a K rail.

(10) FIG. 6 shows an inside view of the K rail cap.

(11) Corresponding reference characters indicate corresponding components throughout the several views of the drawings.

DETAILED DESCRIPTION OF THE INVENTION

(12) The following description is of the best mode presently contemplated for carrying out the invention. This description is not to be taken in a limiting sense, but is made merely for the purpose of describing one or more preferred embodiments of the invention. The scope of the invention should be determined with reference to the claims.

(13) Where the terms about or generally are associated with an element of the invention, it is intended to describe a feature's appearance to the human eye or human perception, and not a precise measurement.

(14) A front view of a K rail cap 10 according to the present invention is shown in FIG. 1A, a side view of the K rail cap 10 is shown in FIG. 1B, a front-side isometric view of the K rail cap 10 is shown in FIG. 2A, and a rear-side isometric view of the K rail cap 10 is shown in FIG. 2B. The K rail cap 10 defines a tapered base portion 20, a top portion 22 and is dimensioned to slide over an end 32 of a K rail 30 (see FIG. 3). The K rail cap 10 is preferably made of plastic or similar material, for example polystyrene or Acrylonitrile butadiene styrene (ABS) plastic, or High Density Polyethylene (HDPE). The K rail cap 10 is preferably of uniform thickness between 0.093 and 0.130 inches, and preferably 0.130 inches, and preferably has a glue line of about 0.060 inches between the K rail cap 10 and the end of the K rail 30. The K rail cap 10 has substantially the same shape as a K rail cross-section, allowing some variation associated with molding the K rail cap 10 and variations in the K rail cross-sections. In general the K rail cap 10 inside dimensions provide about a 0.22 inch clearance around the profile of the exterior of the K rail 30.

(15) In one embodiment for a common K rail, the K rail cap 10 has a height H1 of about 32.7 inches, a bottom width W1 of about 24.7 inches, a top width W2 of about 6.7 inches, and a skirt 11 having a depth D of about 9.13 inches. A lower corner 16 is about a height H3 of about three inches above the bottom 10b, and preferably has a convex radius R1 of preferably about one inch, a waist 17 has a concave radius R2 of preferably about ten inches, and a top corner 18 has a bevel B with depth and height of about 0.75 inches on each side of a top 10a. The top 10a of the K rail 10 is slightly tilted above horizontal, for example at an angle A from a vertical face 14 face to the top 10a is greater than 90 degrees and preferably about 91 degrees. In general, the K rail cap 10 is sized to provide about a 0.22 inch spacing between the K rail cap 10 and the K rail 30 for glue.

(16) The K rail cap has a tapered top portion 22 having a height H5 of about 19.4 inches and tapered at an angle A2 of about 6 degrees and a tapered bottom portion 20 having a height H6 of about 10.2 inches and tapered at an angle A3 of about 35 degrees.

(17) The K rail cap 10 has an opening 12 through the face 14 between recessed access openings 13 and generally centered on connecting features 34 (see FIGS. 4A and 4B) of a K rail 30 (see FIG. 3) allowing the connecting features 34 to reach through the K rail cap 10. Access openings 13 are present above and below the opening 12 and reach between the opening 12 and the top 10a and bottom 10b of the K rail cap 10 and preferably having a width of about 3.2 inches. The opening 12 has a height H2 of about 24.25 inches and a width W3 of about 4.5 inches, and is spaced down from the top of the K rail cap 10 a height H4 to provide access to connecting features 34 (see FIG. 3) on the K rail ends 32 to allow connecting consecutive K rails 30 after attaching the K rail caps 10 to the K rails 30.

(18) The dimensions of the K rail cap 10 may vary depending on the dimensions of a particular K rail design, and a K rail cap configured to fit over the end of any K rail or equivalent concrete structure and provide clearance for fitting over the K rail end and for glue, for example 0.22 inch clearance, is intended to come within the scope of the present invention.

(19) The K rail 30 with a K rail cap is shown in FIG. 3, a first detailed view of an end 32a of the K rail 30 is shown in FIG. 4A, and a second detailed view of an end 32a of the K rail 30 is shown in FIG. 4B. The K rail 30 includes connecting features 34 on the K rails ends 32 for connecting consecutive K Rails. The connecting features 34 are preferably metal loops embedded in the concrete K rails 30. Access passages 36 are above an below a center passage 38. When K rails 30 are arrange end to end, a rod 33 may be inserted through the access passages 36, the connecting features 34, and the center passages 38 to connect the K rails. Known K rails have a designed height H7, a bottom width W5 and a top width W6. The height H5 is 32 inches, the width W5 is 24 inches, and the width W6 is 6 inches. The dimensions of actual K rails varies based on manufacturing, temperature, and other physical factors, and the K rail cap 10 is designed accommodate such variations.

(20) The K rail caps 10 are shown on a K rail 30 in FIG. 5. The connecting features 34 on the K rails ends 32 are exposed through the opening 12 and access openings 13 in the K rail caps 10 to allow connecting the K rails 30 after the K rail caps 10 are attached to the K rails 30.

(21) A K rail cap 10a with closed bottom is shown in FIG. 6. Other than the closed bottom, the K rail cap 10a includes the features of the K rail cap 10.

(22) While the invention herein disclosed has been described by means of specific embodiments and applications thereof, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.