US1997546A - Combined expansion and contraction joint-tubular type - Google Patents

Description

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C OMBINED EXPANSION AND CON IfRACTI 0N J OI NT-TUBULAR TYPE Original Filed Jan. 3, 1922 Patented Apr. 9, 1935 UNITED STATES 4 COMBINED EXPANSION AND CONTRACTION JOINT-TUBULAR TYPE Albert C. Fischer, Chicago, Ill., assignor to The Philip Carey Manufacturing Company, acorporation of Ohio Original application January 3, 1922, Serial No. 526,742. Divided and this application May 9, 1927, Serial No. 190,086. Renewed March 24,

6 Claims. (01. 94-18) This invention relates to certain new and useful improvements in constructional material, the present case being a division of my application filed on the 3rd day of January, 1922, which matured into Patent No. 1,655,835 on January 10, 1928.

He'retofore, in concrete paving where contraction was to be provided for it has been the practice to insert apiece of metal longitudinally or transversely below the surface, so that when the concrete block or slab is fully poured and completed'the contraction joint is not visible at the surface. After the concrete sets and contracts the function of these pieces of metal is to cause a very fine crevice to develop thru the entire slab, so that it becomes visible on the surface, and functioning in this way it is styled a contraction joint.

"'Furtiiendevelopment in this style of allowing for expansion and contraction in concrete pavements can be made in which a wedge or angular formation is provided, so that the projections developing in one concrete slab, by reason of filling in these projections in the contraction joint, penetrate the other slab so that resistance is caused to any lifting action on the part of the concrete slabs. Some of these formations have been angular and some half hexagonal in shape, with straight flanges extending on either side in a vertical position when, placed. These contraction joints, while causing the crevice to form along a straight line across the concrete slab of in the surface above which the contraction joint is inserted, do not prevent the ingress of water,

street acids and the like, which would tend to hastily corrode the metal contractionjoint, and

- also enter the subsoil underneath the slab, keeping the subsoil in the'crev'ice in a damp condition.

My invention provides for an improved contraction joint which has many advantages, and which also provides for the waterproofing of the contraction joint automatically, as well as allowing a better pivot motion on the projection anchor in the adjoining slab. This is caused by the insertion of a bituminous slab of varying thickness, depending upon the requirements. The contraction joint flanges are imbedded in the bituminous slab on either side of the projecting center. This not only tends to preserve the metal flanges but also has a tendency to protect the projection, because in expanding in warm weather some of this bituminous material will find its way along the surface of the uncovered metal.

constantly wet It may be readily understood, of course, that a metal contractionjoint may be coated with paint or bituminous material, in addition to the projecting slabs of bituminous material acting both as expansion and contraction joints.

Expansion jointshave usually been placed so that the upper edge of the joint was visible on the surface of the pavement, and in many cases was allowed to project above the surface, so that the traflic would form a sort of mushroom top over the crevice.

It can be readily understood that the purpose of this invention is to totally submerge both the contraction and expansion parts of this joint beneath the surface, so that when the concrete is finished and poured it will not be visible on the surface but will accomplish the same function, in causing a crevice to form across the surface, due to contraction. It will further functionby waterproofing this crevice from within, and upon expansion of the bituminous 'material, and also the pavement, it will cause the asphaltic substance to work its way up to the crevice, so that after a hot period the bituminous material may often work its way to the surface, while the base part will have a tendency to prevent moisture from coming up, filling the crevice from below, and in this manner the entire crevice will be kept waterproof, and at the same time perform both the functions of an expansion joint and a contraction joint.

vOne of the objects of my present invention is to provide a combined contraction and expansion joint of the character indicated, which includes sion and contraction joint. In this form the joint preferably comprises a metallic member. having a tubular part b which may remain hollow or may be filled completely or partially with concrete, and which tubular portion is provided with 1 an outer coating or jacket of bituminous material a forming the expansion joint. The flanges c are preferably left uncoated or uncovered and the slabs of concrete are poured against the surface.

The bituminous expansion joint a upon compression will expand along the flanges c and keep the joint superposed.

This type of joint provides many advantages, since it not only is locked into position by reason of its irregular surface, but also looks in the adjoining slabs. It provides a maximum of expansibility and compressibility, while at the same time providing an expansion joint which by being rounded on the exterior surface of the tubular portion permits this bituminous expansion joint to expand along the flanges, and particularly along the uppermost flange so that the bituminous material can flow upwardly to the exterior surface in the concrete material in which it is embedded. A further advantage of my improved construction resides in the fact that the tubular portion of the device may be used as a means thru which water or other liquid may drain, whereby to provide a subterranean drainage passage for the roadway and particularly the joint thereof, whereby the water may drain laterally of the road thru a number of such registering sections when imbedded in the concrete.

Another advantage resides in this tubular construction in that the tubular portion may remain hollow to provide collapsibility, expansibility and compressibility, or it may be more or less filled with concrete which not only provides such virtuous features but also affords a very strong interlock with the poured concrete slabs. Though I have described with particularity of detail one embodiment typifying the invention, yet it is not to be understood therefrom that the invention is restricted to the particular embodiment disclosed. Various changes in details may be made by those skilled in the art without departing from the invention.

I claim:

1. An expansion and contraction joint comprising a metal tubular body, and a projecting flange extending from the tubular body in a vertical position, the outer wall of the tubular body being covered with a bituminous jacket.

2. A combined expansion and contraction joint comprising a tubular portion formed with a lat-. erally projecting flange, the tubular portion carrying a coating or jacket of bituminous expansion joint material.

3. A combined expansion and contraction joint comprising a hollow tube formed with one or more lateral projections, said hollow .tube having at least a portion of its outer arcuate face covered with a coating of bituminous expansion joint material.

4. A combined expansion and contraction joint comprising a tubular member having two diametrically opposed flanges, the tubular portion carrying an outer coating of bituminous material.

5. A combined expansion and contraction joint adapted to be positioned between adjacent sections of concrete, comprising a tubular member having upstanding and a depending flange, the tubular portion being enclosed by the bituminous material forming an expansion joint.

6. A device of the class described, comprising a sheet of material having a hollow tubular portion and carrying a preformed portion of compressible, flowable waterproofing material.

' ALBERT C. FISCHER.

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