US2092488A - Joint for pavements - Google Patents

Description

Sept. 7, 1937. W. E WHITE JOINT FOR PAVEMENTS `Filed Deo. 5, 1934 Patented Sept. 7, 1937 UNITED STATES JOINT FOR` PAVEMENTS William E. White, Bethlehem, Pa., assignor to Kalman Steel Corporation, a corporation of Delaware Application December 5, 1934, Serial No. 756,054

17 Claims.

My invention relates to expansion joints for concrete pavement.

One object of the invention is to provide, an expansion'j'oint for a concrete structure or pavement of such construction` that the surface ofthe adjoining sections of the structure` will be retained' substantially in alignment under all conditions.

Another object of my invention is to provide an expansion joint structure with offset portions of such construction that the sections` of the concrete structure on opposite sides thereof areV interlocked against vertical displacement.

The novel features of my invention will be more fully understood from the following description and claims taken with the drawing in which Fig. 1 is a top plan view of a section of a pavement structure illustrating my invention.

Fig. 2 is a sectional view of the structure taken along line 2 2 of Fig. 1.

Fig. 3 is an enlarge-d view of a section of the structure taken along line 3-3 of Fig. l.

Fig. 4 is a perspective view of a section of the strip.

Referring to the drawing, I5 designates a pave ment struct'ure providedV with an expansion joint It embodying my invention. The structure I5 comprises adjacent pavement sections which are shown in the drawingasconcrete slabs `II and I8 having a strip I9 inserted in the joint intermediate the slabs I'I and I8 to provide means to allow the expansion of these slabs. The strip I3 may be of any well known compressible material, such as cork, nbre, asphaltum or the like.

The strip It, as shown, comprises substantially straight upper` and lower portions 20 and 2l respectively. The upper portion 2l) of the strip extends a substantial distance below the surface of the pavement. The lower portion 2| of the strip is provided with a plurality `of undercut recesses ,22, the walls of which converge toward the bottom of the strip and thereby provide dovetail slot adjacent the bottom thereof.

Extending laterally from the side of the strip adjacent the recesses 22 are hollow projections 23 which in cross section are of substantially the same shape asthe recesses 22. Each of these projections 23, as shown in Fig. 4 of the drawing, comprises a metallic member 2liv having end flanges 25and 28, respectively, and a top portion 21, which form the ends and top, respectively, of the-projection 23, and a member 28 of the shape, size and of the same material as the cut out portions of the strip forming the recesses 2| which rforms the outer face of the projection 23, and is shown substantially parallel to the strip proper.

In the construction of a pavement the strips I9 are positioned on the road bed at the proper distance apart so that the necessary joints I6 may be provided in the pavement and the concrete is poured to form slabs such as II and I8 on each side of the joint. Due to` recesses 22 in the strip I9 and the hollow projections 23 projections 29 are provided on the slab I'I which con verge towards the bottom thereof andl recesses 30 are provided on the slab I8- which` cooperates with the projections 29 to provide interlocking means between theslabs AIl and I8 so as to retain the upper surfaces of the slabs I'I and I8 substantially` in alignment while permitting laterally slidable movement of the slabs with reference to each other.

The slabs I1 and I8 are preferably formed soI that the projections 29 are on the near side of the joint,` and the recesses 30 are on the far side of the joint, the direction of traffic over the pavement shown being in the direction of the arrow so that'the slab I8 which is on the far side of the joint will be supported partially by the projections 29 on the slab I1 when the load is transmitted to said slab I8 by traffic passing over the pavement.

From the foregoing it will be obvious to those skilled in the art that I have devised an improved expansion joint structure which is simple in construction and which effectively retains adjoining slabs in alignment and at the same time permit lateral movement due to expansion and contraction.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited but is susceptible of various other changes and modifications without departing from the spirit thereof, and I desire therefore that onlyr such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

I-Iaving thus described my invention what I claim as new and desire to secure by Letters Patent is:

l.. An expansion joint for concrete pavement having separate slabs on opposite sides of the joint, interlocking means on said slabs to retain the slabs against vertical displacement, said interlocking means comprising a plurality of dovetail recesses on one of said slabs having the side wall thereof converging towards the bottom of the slab and a plurality of projections on the other of said slabs having their sides converging towards the bottom of the slab cooperating with the dovetail recesses.

2. An expansion joint for concrete pavement having separate slabs on opposite sides of the joint, interlocking means on said slabs adjacent the edge thereof, said means comprising a dovetail recess in one of said slabs, the entrance to said recess from the bottom of the slab being narrower than the interior of said recess and a projection on the other slab of substantially the same contour as the dovetail recess cooperating with said recess to retain the upper surface of said slab in proper alignment.

3. An expansion joint for a concrete pavement having separate slabs on opposite sides of said joint, interlocking means on said slabs adjacent the adjoining edges thereof, said means comprising a dovetail recess in one of said slabs having the side walls thereof converging towards the bottom of the slab and a projection on the other slab cooperating with said recess to retain the surface of said slabs in alignment while permitting lateral movement of the slabs relative to each other.

4. In combination with a concrete pavement, an expansion joint therefor, separate slabs on opposite sides of said joint, a compressible strip adjacent the vertical edges of said slabs, said strip comprising upper and lower portions within the same vertical plane and a plurality of laterally extending projections adjacent the lower portion of said strip, each of said projections comprising converging side walls and a wall connecting said side walls.

5. In combination with a concrete pavement, an expansion joint therefor, separate slabs on opposite sides of said joint, a compressible strip adjacent the vertical edges of said slabs, said strip comprising upper and lower portions within the same verticali plane, said lower portion having a plurality of undercut recesses therein, hollow laterally extending projections on said strip adjacent said recesses, each of said projections comprising downwardly converging side walls and an end wall connecting said side walls. l

6. In combination with a concrete pavement, an expansion joint therefor, separate slabs on opposite sides of said joint, a compressible strip adjacent the vertical edges of said slabs, said strip comprising upper and lower portions within the same vertical plane, said lower portion having a plurality of undercut recesses therein, hollow laterally extending projections on said strip adjacent said recesses, each of said projections comprising downwardly converging side walls and an end wall connecting said side walls, said end wall comprising a member of substantially the size and shape of the undercut recesses.

7. A road strip for an expansion joint comprising a substantially straight longitudinal member of a compressible material having undercut recesses in its lower portion, and laterally extending projections of the same general contour in cross section as the undercut recesses connected to said strip adjacent said recesses, each of said projections comprising downwardly converging side members.

8. A road strip for an expansion joint comprising a substantially straight longitudinal member of a compressible material having undercut recesses in its lower portion, and laterally extending projections of the same general contour in cross section as the undercut recesses connected to the side of said strip adjacent said recesses, each of said projections comprising downwardly converging metallic side members and a compressible end member.

9. A road strip for an expansion joint comprising a substantially straight longitudinal member of a compressible material having undercut recesses in its lower portion, and laterally extending projections of the same general contour in cross section as the undercut recesses connected to the side of said strip adjacent said recesses, each of said projections comprising a flanged metallic member having downwardly converging flanges and a compressible member intermediate the flanges of said metallic member.

10. A compressible parting strip for concrete pavements having a series of undercut recesses 'along its length adjacent the bottom thereof and a plurality of hollow projections, having downwardly converging sides of substantially the same general contour in cross section as the undercut recesses connected to one side of said strip adjacent said recesses.

11. An expansion joint for concrete pavement having separate slabs on opposite sides of the joint, interlocking means on said slabs adjacent the edge thereof, said means comprising a recess in one of said slabs, the entrance to said recess from the bottom of the slab being narrower than the interior of said recess, and a projection on the other slab cooperating with said recess to retain the upper surface of said slab in proper alignment.

12. An expansion joint for a concrete pavement having separate slabs on opposite sides of said joint, interlocking means on said slabs adjacent the adjoining edges thereof, said means comprising a recess in one of said slabs having the side walls thereof spaced at a lesser degree adjacent the bottom of the slab than they are spaced a distance from the bottom of the slab and a projection on the other slab cooperating with the walls of said recess to retain the surface of said slabs in alignment while permitting lateral movement of the slabs relative to each other.

13. In combination with a concrete pavement, anexpansion joint therefor, separate slabs on opposite sides of said joint, a road strip adjacent the vertical edges of said slabs, said strip comprising upper and lower portions within the same vertical plane and a plurality of laterally extending projections adjacent the lower portion of said strip and extending substantially to the bottom thereof, each of said projections comprising side walls having the lower portion thereof spaced at a lesser degree than the upper portion thereof and a wall connecting said side walls.

141. A parting strip for concrete pavements having a series of undercut recesses along its length adjacent the bottom thereof and a plurality of hollow projections having sides extending substantially to the bottom of the strip and the lower portions of which are spaced at a lesser degree than the upper portions thereof extending to the side of said strip adjacent said recesses.

15. A joint for a concrete pavement having separate slabs on opposite sides of said joint, means in said slabs adapted to retain the upper surface of the slabs in proper alignment, said means comprising a recess in one of said slabs, having its sides spaced a greater degree towards the top of the recess than at the bottom of said recess and means extending from the other slab into said recess and cooperating with the sides of said recess.

16. A road strip for an expansion joint comprising a longitudinal member having undercut recesses in its lower portion, the entrance to said recesses from the bottom of said member being narrower than the interior of said recesses, and laterally extending projections of substantially the same general contour in cross section as the undercut recesses connected to said strip adjacent said recesses, the bottom of said projections lying in substantially the same horizontal plane as the bottom of the strip.

17. In combination with a concrete pavement, a joint therefor, slabs on opposite sides of said joint, a road strip intermediate said slabs having associated with the other slab to retain the slabs 10 against independent vertical displacement.

WILLIAM E. WHITE.

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