US1746169A - Resilient pavement - Google Patents

Description

1930. v i 7' swANsoN 1,746,169

RESILIENT PAVEMENT Fi1 ed March 8. 1926 2 Sheets-Sheet l .INl "EN TOR.

A TTORNE) Feb. 4, 1930. w. E. SWANSON RESILIENT PAVEMENT Filed March 8, 1926 2 Sheets-Sheet 2 NkENTOR.

ATTORNEY. v

6 over'brick, stone or concrete pavements, 1n

Patented, Feb. 4, 1930 WILLIAM E. SWANSON, OF WEEH AWKEN, NEW JERSEY nns'rmnnr PAVEMENT Application filed March 8', 1926. Serial No. 98,022.

, The present invention relates to pavements and road beds, and more particularly to rubber pavements and method ,of laying same.

Rubber pavements have many advantages that noise and vibrations are practically eliminated. Such pavements are particularl applicable in the vicinities of hospitals, sc 001s and the like. For general use where noise and vibration are not vital elements, the avements excel others since they are li may be subjected, and have wearing ualities much superior to cement and. maca amized I 1 roads and pavements. The difficulty encoun-- tered in their adoption has been'the tendency for them. to creep under the influence of traction forces and inability rigidly to fix them in lace. To overcome these obj ections wooden eds have been used for nailing the rubber blocks in position but these have not been sat- I isfactory for the reason that the wood decays, the nails become-loose, and frequent repairs are necessary. v 3 The present invention eliminates the above difiiculties by utilizing a road bed of soft concrete and-embedding blocks having cavities in the base portions thereof, in the con crete bed so that the two portions of concrete con eal and form a solid mass of concrete protru ing into the block and locking-it securely Y in position. Transverse and longitudinal channels may be provided and the concrete common to the bed-and base portion of the ance of the blocks remaining in position.

An object of the present invention is to provide a ractical rubber pavement laid on a concrete ed with each block locked; firmly in position and forming sub of the concrete bed, whereby creeping o the blocks is completely eliminated. j

Other and further objects of the invention will be obvionsupon an'understanding of the 4 illustrated embodiment about to be described,

or will be indicated in the appended claim and many avantages other than those'herein specifically referred to will occur to one skilled in the art upon employment of the invention in practice.

Fig. 1 is a perspective view of one ofthe embedded in concrete;

t in" weight, unaffected by the heat to whic they .form a harder composition for the base pornel to "receivea suitable cement or pitchl9,

blocks may be reenforced as a. further assurl iallya art A preferred embodiment of the invention has been chosen for the purpose of illustration and description, and is shown in the accompanying-drawings, wherein paving blocks;

Fig. 2 is an end view of a series of blocks Fig. 3 is a perspective view of a pavement partly laid; and v Fig. 4 is a longitudinal cross section of a paving block as laid with certain portions of the "concrete broken away. I

The preferred form 0 rubber'block 9 used in laying pavements in accordance with the .65 present mvention comprises an upper portion 10 of rubber .having a relatively soft composition, and a lower portion 11 having a greater sulphur and asphalt mixture to tionto prevent deterioration. The upper portion of the-block is cut away 4 t '13 ad'acent theouter edges to form when placed eside other blocks, a substantlally U-shaped chanits composition being such that. it will prevent the entry, of water between the blocksand at the same time will not flow or stick to the pedestrians shoes when exposed to the.

heat of the sun. The base portion -of the block preferabl comprises a longitudinal dovetail channe 14 extending along the cen- 'tral portion thereof, the width of the u per part of the channel being substantially greater than the width of the lower part thereof, so that it may-be firmly locked to a concrete road bed. The longitudinal edges at the base of the block are cut away at 15 to 7 form with an adjoining block a channel into which the concrete may be forced to form a traction stop. A channel '16ex'tending longitudinally of the block is likewise formed at the upptr portion of 'thedovetail channel to form an additional traction sto at the center of the block, Similar channe s 17 are 5 formed .transvesely at suitable intervals, shown" herein as four to the block, to resist the traction forces in a longitudinal direction.

In laying the pavement it is desirable to form a suitable bed ofconcrete which may, 100

for convenience, comprise a lower layer 18 of crushed rock, cement and sand poured .wet into the bed, and an upper layer 19 of concrete formed with cement and sand, which should be run through a screen hav1n a relatively small mesh. Suitable reenforcmg strips 21 may be laid longitudinally of the 1 bed and spaced from each other a distance equal substantially to the width of a block.

memes having its longitudinal ed es cut awayto form additional channels etween individual blocks to prevent creeping, the upper edges of the block being cut away receive suitable material for sealing the oints between adjacent blocks.

WILLIAM E. .SWANSON.

While the concrete of the road bed is soft,

rubber blocks. having suitable cavities inthe base portion thereof, preferably longitudlnal channels 14, are carefully filled with concrete similar to that in the upper strata of the road bed, so that there are no air pockets therein, and are then placed over the corrugated reenforcing members 21 so that the upper edges ing therebetween. If desired, the upper surface of the blocks may be cut to form a series of smaller blocks on the upper surface of each of the larger blocks, as shown in Fig. 3

thereby to reduce the traction roll longitudinally and transversely of the pavement.

It will be seen that a pavement in accordance with the present invention possesses the advantages enumerated hereinbefore with reference to rubber pavements, and at the same time, the blocks forming the upper surface thereof are rigidly held in position and are substantially a part of the concrete. Slipping in a longitudinal and transverse direction is impossible, and accidental d splacement of the blocks is prevented. The form of blocks utilized is simple in construction and may be made from molds having a minimum number of parts, and the pavement itself is such that the supporting bed may be formed by road machinery now in use and the blocks may be speedily laid thereon. Furthermore the pavement is fully capable of withstanding the heavy'loads and rough usage to which it will be subjected. 4 i

As various changes may be made in the above embodiment without departing from the spirit of the invention, all matter herein set forth is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim:

As an article of. manufacture, a rubber paving block having anupper surface of different characteristics from the lower portion thereof, said lower portion having a channel extending longitudinally thereof and;

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