US2127973A - Anchoring device - Google Patents

Description

J W. lSETT ANCHORING DEVICE Aug' 23 Original Filed July 29, 1955 2 Sheets-Sheet 1 NON @i E EN n. E u Z W Aug. 23, 1938. J. w. lsETT ANGHORING DEVICE Original Filed July 29, 1955 2 Sheets-Sheet 2 FZ7. j?.

Patented Aug. 23, 1938 PATENT OFFICE ANCHORING DEVICE John Warren Isett, Hinsdale, Ill.

Continuation of application Serial No. 33,682, July 29, 1935. This application March 31, 1936, Se-

rial N0. 71,858

This invention relates toanchoring devices for use in concrete road construction. The main ob# of concrete roads without the use of tying means` or dowel rods which protrude from one section while an adjacent section is being graded or prepared. Reference is made to my Patent No. 2,039,420 issued May 5, 1936, of which the present application is a continuation.

Another object is to provide means for the purpose described in the preceding paragraph, which may also be used in combination with reinforcing rods which may be put under tension for the purpose of preventing cracking of the concrete section.

Heretofore, for the purpose of tying the two sections of the road together and transmitting a portion of the wheel load from one section to the other, it has been customary to embed in the concrete being poured to form the rst section of road, a plurality of spaced rods usually made of metal and approximately 4 feet in length, about half of each rod being embedded, and to bend each rod so that the free half extends at a right angle to the embedded portion and lies closely adjacent to the side surface of the concrete between the concrete xand the form. When the form is removed, some 'of the free ends of the rods are pulled away from the section in which they are partly embedded and thus protrude while the adjacent road bed is being graded and prepared for pouring concrete thereon. After the grading is completed and before the next concrete section is poured, the bent rods are straightened so as to extend in alignment with the embedded portion and into the concrete to be poured to form the next adjacent section. IThis method has serious disadvantages due to the fact that the protruding portions of the rods or dowels frequently are broken oli or the steel is fractured by contact with the grading machinery and the bending and subsequent straightening of the rods fractures them and causes breakage, thereby defeating their intended purpose.

Another method heretofore used included thev step of driving straight rods or dowels through holes in the form, into the concrete of the iirst section before it became hardened, about half of each rod or dowel being embedded, with the other half protruding beyond the form. The protruding rods or dowels not only interfere with the grading machinery in preparing the sub-grade for the second section, but prevent the necessary grading or rolling of the sub-grade close to the edge of the'flrst poured section.

The anchoring devices herein shown and described tie adjacent road sections together and obviate the diiiiculties and objections mentioned. 5 Furthermore, they may serve to support and hold in intended positions shear bars or mesh used for reinforcing concrete roads.

By the use of the anchoring devices of my invention I obviate the necessity for increasing the 10 thickness of the concrete at or near the inner edges of adjacent sections, as well as at or near the inner edges of the adjacent sections in multiple lane roads poured in sections, in which the proximate edges of adjacent sections are provided' 15 with the conventional tongue and groove or hinge construction.

In the drawings:-

Fig. 1v is a vertical sectional View through part of a section of concrete road and the removable 20 wood form used in the construction of same showing one member of my anchoring device in position in the road section.

Fig. 2 is a vertical sectional view of the section shown in Fig. 1 with the form removed and a 25 second section of concrete adjacent to the first section showing the two cooperating members of my anchoring device in position in adjacent, separately formed road sections.

Fig. 3 is a vertical sectional view similar to Fig. 30

1 showing part of a section of concrete road pro-. vided with a vertical groove metal plate for forming a tongue and groove in the joint to produce a hinge-like eiect between the two sections of concrete and also showing the form used in con- 35 structing the section.

Fig. 4 is a vertical sectional View showing the section illustrated in Fig. 3 with the forms removed and with another concrete section poured andl anchored adjacent to the iirst mentioned 40 section.

Fig. 5 is a vertical sectional View of a road section similar to that shown in Fig. 3 but showing a modified form of anchoring member.

Fig. 6 is a vertical sectional view showing the 45 section shown in Fig. 5 with the Wooden or steel form removed and with another concrete section adjacent the rst mentioned section.

Fig. 7 is an enlarged end view of that member'. of the anchoring device shown inFig. 1. 5o

Fig. 8 is a side elevation of a. modied form of anchoring device. V

Fig. 9 is a sectional view taken in the plane of the line 9-9 of Fig. 8.

Fig. 10 is a vertical sectional viw through a l:so

section of concrete road, broken between its ends, showing the anchoring member of Figs. 8 and 9 embedded in the concrete, in combination with a reinforcing rod which has been placed under tension.

Fig. l1 is a longitudinal vertical sectional view of a modified form of anchoring device which may be substituted for the anchoring members of Figs. 1, 3 and 5.

Fig. 12 is a vertical sectional view taken in the plane of the line I2I2 of Fig. 11.

Referring to that embodiment of my invention shown in the drawings, adjacent concrete sections are indicated at II! and II. In Figs, 1 and 2 the anchoring device comprises a metal insert I2 and cooperating tying device I3. The insert I2 consists of a tubular body I4, internally screw threaded at I5, provided with flanges I6 cut away at I1 to provide recesses for nails I8. The body I4 merge.. into a bolt I9 terminating in a hook 20. The tying device I3 consists of a bolt 2'I having a screw threaded end 22 and a hook 23.

A conventional wooden form 24 is shown in Fig. 1 to conne the concrete section I0. The inserts I2 are nailed to the inner surface of that part of the form which defines the edge which will be adjacent to another concrete section. After the inserts have been fixed in their intended positions, preferably frorn l to 5 feet apart, the concrete is poured to form the section I0. In due course the form 24 is removed and the flanged mouths of the internally screw threaded tubular bodies I4 are exposed. After vthe grading for the adjacent section II has been concrete are tied together efliciently and undesired relative movement of the sections is prevented. When sections located transversely of the roadway are constructed according to my invention, I prefer to use hook shaped tying devices I3 or other suitably formed devices which tie the concrete sections together, whereas between sections which extend longitudinally of the roadway I prefer to use smooth bolts or shear bars painted and greased so as to permit relative movement between the sections longitudinally of the roadway.

Referring to that embodiment of my invention shown in Figs. 3 and 4, the adjacent concrete sections II) and II indicate sections disposed transversely of the road and separated by a vertically disposed plate 25 for producing the conventional grooved longitudinal center joint. The plate 25 is known as a groove form plate and when used in constructing roads according to my invention is provided with a plurality of apertures' 26 spaced apart preferably two to five feet, longitudinally of the plate. In this embodiment of the invention the form 21 is similar to the from 2'4 heretofore mentioned except that it may be made out of metal or wood and is provided with apertures 28 which register with the apertures 26 of the plate 25. After the form 21 has been set up to define the section II), the plate 25 is positioned adjacent the inner surface of that part of the form which defines the side margin of the concrete adjacent the section II to be subsequently poured. Inserts I2 and the plate 25 such as heretofore described, are held in place by means of headed bolts 29 which extend through the apertures in the form 21 and plate 25 into the screw threaded bodies I4 of the inserts. The inserts are spaced preferably 2 to 5 feet apart, longitudinally of the form 21, and between the upper and lower edges of the form. After the concrete ID has set the bolts 29 and form 21 are removed. If desired the grooved plate 25 may also be removed to be used again for forming other sections. By the use of the anchorage devices of my invention, permitting the removal and reuse of the plate 25, I save a substantial sum of money, approximately eighteen hundred dollars per mile.

The removal of the form 21 or of the form 21 and plate 25 will expose the internally screw threaded portion I5 of the inserts I2 at that vertical face of the section I0 which will abut the adjacent section I I. After the grading for the section II has been completed, tying devices I3 are screwed into the inserts I2 and then the concrete to form the section I I is poured adjacent the section Ill to cover the devices I3. The shape of the grooved plate 25 produces a hingelike joint between the concrete sections IU and I I which is held securely together by means of the tying devices without the unnecessary and uneconomical use of thickened center edges, thereby effecting a great saving in concrete.

In Figs. 3 and 4, I have shown shear rods 30 in the hooked ends of the anchoring members I2' and I3, extending longitudinally of the road sections I and II. These rods reinforce the concrete IU and II and assist in maintaining the road sections in proper relationship to each other. The hooked ends may also be used for holding the reinforcing mesh used in road construction. When such rods or mesh are hooked into the hooked end of the insert of one section and the hooked end of the tying device of an adjacent section, continuous transfer of wheel load from one section to another results.

In Figs. 5 and 6 are also shown the forms 25 and 21 of Figs, 3 and 4, but in Fig. 6 the plate 25 is shown as retained between the sections I0 and II. A modified form of insert designated 3| has been substituted for the member I2. The insert 3I comprises a body 32, internally screw threaded at 33, said body merging into a cross shaped portion 34 ending in a disc 35. This form may be used when the hooked form is not required. The radially extending members of the portion 34 prevent rotation of the insert in the concrete.

The modied form of insert shown in Figs. 8, 9 and 10 comprises a body 36 internally screw threaded from end to end as indicated at 31, and provided with a flange 38 ush with one end, and having a notch 39 at each side of the flange. This form of insert may be used with tying devices, such as heretofore described, to connect adjacent separately poured concrete sections, and it may also be used as shown in Fig. 10, where the flanged end is nailed at 40 to a form 4I, and a rod 42 is inserted in the opposite end. The rod 42 may extend longitudinally of the road 43, from one expansion joint to another, or transversely across a road section to be poured. After the concrete 43 has hardened', a nut 44 is tightened on the threaded end 45 of the rod 42 (the form 46 having been removed) to place the rod 42 under tension for the purpose of preventing cracking of the concrete.

In Figs. 11 and 12 I have shown a modified form of insert which may be substituted for the forms shown in Figs. 1 to 7, inclusive. It comprises a body 41 having radially projecting, longitudinally extending flanges l4B and an end iiange or disc 49. At the other end the .body is enlarged to form a rectangular recess 50 and face 5l having .an opening 52 wider at its top than at its lower portion. Notched ears 53 are used for receiving nails for temporarily attaching the insert to a form asheretoi'ore described. A' bolt 5l having. a square =head 55 is adapted to enter the recess 50 and be retained by the flange or face 5I. The bolt El may have a hook on its opposite end or maybe plain, deformed o'r of any other desired form. A

The two-piece anchoring devices herein shown and described serve the dual purpose of tying. together adjacent, separately poured concrete sections without having any part protruding from one section while an adjacent section is being graded or prepared, and of anchoring shear bars, reinforcing rods or mesh such as are used in road construction.

The devices herein described may be used in the construction, repairing, widening and resurfacing of roads, and the form of the inserts and tying devices herein shown and described may be varied without departing from the scope of my invention. a

I claimzv 1. In an anchoring assembly of the character described, an embedding member comprising a shank portion, a laterally projecting portion, an integrally formed socket portion and a form'or plate-engaging flange surrounding the socket portion, together with means in combination therewith for maintaining the form or plateengaging flange of the embedding member temporarily in abutting engagement with a form or plate, said means comprising a fastening device extending between the form or plate and-the embedding member for holding said member and the embedding. member.

said form or plate in abutting engagement with,

. one another.

shank portion, a laterally .extending portion and a socket portion, said socket portion being adapted to abut a concrete form or plate, togetherwith means in combination therewith for maintaining said /embedding member temporarily in abutting engagement with said form or plate, said means comprising a member having one extremity adapted to engage the form or plate and the opposite extremity adapted to interlock within said socket portion. 1

3. In an anchoring assembly of the characterv described, an embedding member comprising a shank portion, a .socket portion having a supporting flange formed thereon land a laterally projecting extremity extending from the shank portion, all ofsaid portions being formed integrally with one another, and a tying 'member in combination therewith. said tying member comprising a. shank ,portion, a laterally projecting portion extending from one extremity of the shank portion and a portion extending from the opposite extremity of theshank adapted to have interlocking engagement with the socket portion of the embedding member. v

4. In an anchoring assembly of the character described, an embedding member comprising a shank portion, a socket portion and a hookshaped extremity extending from the shank portion and adapted to have supporting engagement with a concrete reinforcing member, and a tying member in combination therewith, said tying member comprising a shankportion. a laterally projecting portion extending from one extremity of theshank portion and adapted to have supporting engagementwith a concrete reinforcing member and a portion extending from the opposite extremity of the shank adapted to have interlocking engagement with'the socket portion oi.

JOHN WARREN IBETT.

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