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Publication numberUS2103337 A
Publication typeGrant
Publication dateDec 28, 1937
Filing dateMar 17, 1937
Priority dateMar 17, 1937
Publication numberUS 2103337 A, US 2103337A, US-A-2103337, US2103337 A, US2103337A
InventorsFoster Oury John
Original AssigneeFoster Oury John
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Expansion joint
US 2103337 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


Filed March 17, 1937 2 Sheets-Sheet l Maw);

Patented Dec. 28, 1937 UNITE-D STATES PATENT oFFlcE 7 Application March 17,

'5 Claims.

-My inventiontrelates -to .expansion joints for concrete structures .and the like, and has particular referenceto an expansion joint which is fashioned from ,a single unitary flat piece of .fiexible material of suitable width .andlength, and which is bentatsomepoint intermediate its length so its end portionsare at an angle .to each other and, is used in sections of concrete making angularrturns, thereby providing an exp'ansion joint; for turns or. corner constructions which is .not subject to breakage. or leakage as-is commonwith expansion joints now in use.

Another and furtherobjectloi my invention is the provision of anexpansion joint made from a single sheet of foldable,materiahsuch as copper, which can be.,.bent to;form; ,a right angle turn and embeddedin a concrete structure, thus providing a leakproof joint in the. structure and which prevents moisture from passing through 20. the walls of the structure,such as a wall, floor or ceiling, and also in trenches, conduits, tunnels, reservoirs, swimmingpools, and the like.

In practice themaklng of flumes, reservoirs,-

swimming pools, basements or any concrete structure subject to hydrostatic pressure, the; concrete itself can be coated in such manner that it is impervious to water, but due to the expansion and contraction of the concrete, expansion joints must be used between thesections makingup the Walls of the concrete structure. These expansion joints are made in various. typesand forms and when necessary to provide an expansion joint for a-bend in concrete structures-or a right angle turn in concrete walls, the expansion joint has been made from metal and bent to form with the ends soldered together to form a unitary structure. Due to the strains imposed upon the soldered metal after the structure is in service, the solderbreaks awa thereby permitting mois- 4il ture to leak through the joint, destroying its usefulnessand effectiveness in preventing moisture from passing through the structure at the joints. Asa result these structures begin leaking, and being embedded in concrete it is extremely diflicult, if not impossible, to repair such leaks. In some cases they cannot be repaired at all, and as a result such structures are ofttimes defective.

In my improved structure a single unitary section of flexible material, such as copper, is bent around a corner and embedded in the concrete structure so that no solder is used. 'In view of the fact that the expansion joint at thefcorner is continuous and the material is unbroken, there ,Siis not the stress and strain ,put upon it in the preserving the concrete structure from the development of leaks atthecorners or where, the concrete wall changes its direction.

Another and further, object of my invention is the provision of a concretejoint "which can be easily and quickly shaped to form angles or' the like, through the useof proper tools on the job between the concrete slabs.

Theseland other, objects of, my invention will be more fully and .betterunderstood; by refervents moisture, from passing through the joints 7 encev to the accompanying sheets of drawings,

and in which-.

Figure 1 :is a perspective view of a portion of a concrete structure showing my improved expansion joint applied thereto;

.Figure 2-is a fiat slab-of concrete showing a plurality of these expansion joints placed in such position that anexpansionjoint is formed which prevents the passageoi moisture through the joint between the slabs of concrete;

.Figurev 3 is an elevational view .of a piece of material showingthe foldllines marked thereon;

Figured is an elevational view 0121 portion of the material showing a channel projecting upward therefrom Figure 5 is a side elevational view of an expansion jointiormed, ready to be placed in a concrete structure;

Figure 6is an elevational view of one end of the expansion joint showing the. section projecting inward; i

Figure Tis a view similar toFigure-3 showing a 'flat piece of material with fold lines marked thereon, the channel in this section having a slightly flattened portion thereon 'Figure 8"is an elevational view showing the flattened section ofrib;

- Figure 9-is a-side elevational view or the expansion joint shown in Figure 7 after being folded to position; and

Figure 10 is an elevational view showing the channel section in one end of the expansion joint shown in Figure 9.

Referring now specifically to the drawings, and in which like reference characters refer to like parts throughout, a vertical concrete wall |5 is shown, which has a horizontal wall |'6 integrally formed therewith extending at right angles to the portion l5. An expansion joint, designated as a whole as- H, is provided in the end of the concrete sections I5 and I6 and against which similar concrete sections are formed in abutting relation in the construction of a wall for a fiume, conduit, basement fioor or the like, as may be desired. The expansion joint (Fig. 3) is made up of a single piece of flat, flexible material such as copper, and has fold lines markedthereon, lines I8 and I9 extending longitudinally of the expansion joint H, with a center line 20 being provided, with transverse lines 2| and 22 and short diagonal lines 23 and 24 which register with the lines 2| and 22 at one side thereof and connect at the point of intersection with the longitudinal fold line 20'. When the expansion joint I1 is folded along these lines, wing portions 25, 25 are formed at each side of the joint member,

with a V-shaped channel section 26 therebetween, and isso folded that when the expansion joint member is finally formed (Fig. l), the channel portion 26 on one end of the expansion joint member extends inward (the horizontal section in Fig. 1), while on the other end of the member the channel section 26 extends outward from the expansion joint member (the vertical portion shown in Fig. 1), with the spread of the V being comparatively narrow so that the Wing portions 25 are embedded in the concrete, movement of the expansion joint member is permitted through the flexing of the channel section 26.

When these joint members are fashioned, the material is folded along the longitudinal fold line 26, which becomes the apex of the channel portion 26 of the joint member. The material is again folded along the longitudinal fold lines l8 and I9 whereby the wing portions 25 are formed, these portions extending generally parallel to the longitudinal direction of the concrete structure, as shown in Figure 1, and are embedded in the concrete as it is formed. The walls of the channel section 26are angularly positioned with respect to the wing portions 25, with the spread of the V-shaped channel section'being of sufficient width to allow for contraction and expansion of the concrete. The strip of material is thereafter folded transversely along the fold lines 2| and 22 and the diagonal fold lines 23 and 24. Preferably, one end of the material in this form has the apex of the V-shaped channel section extending in one direction while at the opposite side the apex thereof extends in the opposite direction. I'he apex of one of these channel sections extends into and centers at the bottom of the channel portion 26 of the expansion joint member. In this way the material is folded so that the expansion joint is a continuous strip of material extending around the corners and, of course,the ends may be overlapped if it is desired to put in several sections of material in a concrete structure.

In Figures 7 to 10, inclusive, a modified form of structure is shown. In this structure longitudinal fold lines Z'I'and 28 are provided centrally located with respect to the flexible member amass? making up the joint, while other longitudinal lines 29 and 3|] are provided along which the material is folded along transverse fold lines 3| and 32 extending across the outer or wing portions 33, 33 of the member and along diagonal fold lines 34 and 35. These fold lines intersect a fold line 36 connecting the two fold lines 21 and 28, and which, when the material is formed, provides a channel section 31 having a flat portion 38 at one side thereof, but in which the channel section 31 extends in one direction on one end of the expansion joint member, and in the opposite direction at the other portion of the member, particularly as shown in Figure 9.

In Figure 2 is shown a form of device made into a rectangle for placing in a flat slab of concrete 39, for road work and the like. This form is of the same type as shown in Figure 1, with the exception, of course, that the dimensions of the expansion joint member are such as to conform to the flat slab'and in which'only a short portion of the expansion joint member is turned at an angle to form the vertical portions of the ex-' pansion joint extending from the top and bottom of the slab 39.

In operation of the device, it will 'be understood that these joint members are formed with appropriate tools on the job where the concrete is poured. They can be fashionedto fit the particu- I lar forms of concrete being poured and are placed in position with the concrete poured therearound, and thereafter the concrete joints are formed by packing in the usual manner by using some form of bituminous material between the ends of the concrete members, thus embedding the joint members in the concrete structure.

While I have described more or less precisely the details of construction, I do not wish to be understood as limiting myself thereto, as I contemplate changes in form and the proportionof parts and the substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of my invention.

I claim:

1. An expansion joint for concrete structures comprising a unitary sheet of metal having its end portions folded at an angle to each other and into channel portions in one section, the channel section projecting inwardly and the other portion having the channel portion extending outwardly.

2. An expansion joint for concrete structures composed of a unitary sheet of metal folded into channel sections with wings extending therefrom" at an angle thereto having portions folded atan angle to each other with the channel section ex tending inwardly on one end of the section and outwardly at theopposite end. 1

3. An expansion joint member comprisinga unitary sheet bent in a longitudinal direction to form a channel member intermediate the, sides of the said member, and having wing members extending outward from the channel member on each side thereof and bent intermediate its ends to form portions at an angle to each other, the said channel section extending in one direction in one portion of said member and in theopposite direction in the other portion of. the said member.

4. An expansion joint member composed of a single sheet of foldable materialhaving a V: shaped channel section extending longitudinally thereof, and wing portions extending outward from said channel. section on .each sidethereof, the section being folded in a transverse direcfrom said channel section on each side thereof, the section being folded in a transverse direction intermediate its ends whereby one end is disposed at an angle to the other end to the apex of the V-section on one end, extending into the trough of the V-section at the other end at the point where the section is bent in a transverse direction. j g


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2961803 *Mar 21, 1957Nov 29, 1960Morris ShapiroContraction joint and seal for concrete structures
US3880541 *May 3, 1973Apr 29, 1975Felt Products Mfg CoSealing member, sealing assembly and method for roadway curb and gutter intersections
US3881835 *Jun 6, 1973May 6, 1975Felt Products Mfg CoSidewalk-curb sealing member, assembly and method
US6354760Nov 18, 1998Mar 12, 2002Russell BoxallSystem for transferring loads between cast-in-place slabs
US7481031Sep 13, 2002Jan 27, 2009Russell BoxallLoad transfer plate for in situ concrete slabs
US7637689Aug 11, 2006Dec 29, 2009Russell BoxallOn-grade plates for joints between on-grade concrete slabs
US7716890Jun 9, 2008May 18, 2010Russell BoxallTapered load plate for transferring loads between cast-in-place slabs
US7736088Jul 13, 2006Jun 15, 2010Russell BoxallRectangular load plate
EP0360905A1 *Sep 29, 1988Apr 4, 1990Siemens AktiengesellschaftExtension joint
WO1999031329A1 *Nov 25, 1998Jun 24, 1999Permaban North America IncSystem for transferring loads between cast-in-place slabs
U.S. Classification52/396.3, 52/712
International ClassificationE04B1/68
Cooperative ClassificationE04B1/6807
European ClassificationE04B1/68D