USRE12077E - Reissued feb - Google Patents

Description

A. H. PERKINS, DEGD.

THE U NITEIJ STATES REPAIR 8: GUARANTY. COMPANY, ASSIGNEE.

METHOD OF REPAIRING AMERICAN ASPHALT PAVEMENTS.

- APPLIUATION FILED SEPT. 11, 1902.

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UNIT D STAT-as PATENT OFFICE.

THE lj'NlT ED STATES REPAIR-d: GUAR A N'lY COMPANY, O F ClllCAGO,ILLINOIS,

. A CORPORATION oF'I LINoIs, itssiosnn, er MESNE AMOS lllllllPEEKlNS, DECEASED.

ASSIGNMENTS, OF

METHOG (3F REPAlFlING AMERlCAN ASPHALT PAVEMENTS.-

ziPECIFICATION forrning partner Reissued Letters Patent No, 12,077, dated February 3, 1903. Original No..50l,5 3 7 datedlluly 1893. Application for reissue filed September 11,19UZ. Serialllo. 123.034.

To all whom 71; may concern:

Be it known that THE UNITED STATES Rn- PAIR & GUARANTY COMPANY, a corporation duly organized under the laws of the State of Illinois, herebym'akes application for the reissue of Letters Patent No. 501,537, granted to AMOS H. PERKINS on July 18, 189$,covering acertain new and usefullniprovement in the Method of Repairing American Asphalt Pave- [O ments, the said applicant being the assignee of the entire right, title, and interest in and to the invention covered by the said Letters Patent; and the following is declared to he a full, clear, and'exact description of the inven [5 tion, such as will enable others skilled in the 'art to which it pertains to make and use the same, reference being bad to the accompanying drawings, which form a part of this speciiication.

The invention is designed to produce a method whereby the repairing of American asphalt pavements may be quickly and cheaply accomplished and a mater-appearing pavement be obtained after repairing than has heretofore been the case. p

lleretofore in the repairing it has been customary to dig out with a pick or other instrument the surface material around the spot to be repaired, sometimes applying heat to the spot to soften the material, so that it may be more easily removed. When the material has been removed, the depression thus made ,is' thoroughly cleaned and given a coat or dressing of tar. New material inf-,a heated state has then been placed in the depression and been ironed down and smoothed off in the usual mann'er'of finishing, the tar. acting asasolder to hold the new material in place. \Vhen completed, however, the line or joint 40 between the old hardened material and the new material has been plainly discernible,and more often there has been more or less of a ridge. Again, this new block ot material by reason of frost or from other causes is irequently torn loose from its soldered connection with the old material, thus necessitating new repairs. In practicing the invention the spot to be repaired and the surrounding edges are subjectedto such a degree of heat that the surface asphalt, not only the exact ment it is then agitated and mixed with enoughnew material to fill up the spot to be repaired. It is then subjected to the usual finishing operation of ironing and burnishing. The heating by a blast of the surface may be accomplished in various Ways and by Go means of various forms of apparatus, but one form for accomplishing the result being herein shown; yet it should be understood that applicant is not limited to any particular form of apparatus for carrying out the invention.

In the drawings, Figure 1 represents aside elevation, and Fig. 2 an end elevation, of an apparatus for heating the pavement after it is laid.

In carrying out the invention, Arepresents a suitable tank for carrying gasolene, mount". ed on the wheeled frame B, connected by the pipe C with a series of horizontal pipes D. These pipes D carry aseries of burners E, which pass through a hood or shield F and project a iianne downward against the pav znent. Pressure is then obtained upon the gasolene to force it to the burners and to produce a blast by means of an air-pump G, mounted upon the tank.

The apparatus is also provided with a bandle ll, whereby the operator may readily move it to any desired spot. Now, as would be seen,by turning onas many of the burners as are desired a strong blast of heat is pro- .85

. jected against the surface of the asphalt and readily melts it. As explained above, when it isdesired to repair a spot the apparatus is moved adjacent thereto, with the burners directly above The spot. These soon reduce the surface asphalt both at the spot and at. the surrounding edges to a pliable state, the strong blast causing notonly the immediate surface, but the particles deep down, to be melted. and yet not burned. With a rake or other suitable instrument the operator then agitatcs or stirs up the softened material, and

by adding new material of substantially the" same degree of softness the spot or depression to be repaired is filled up and subjected roe tion, as in the case of to the usual smoothing and finishing operaanewpavement. This, as will be seen, is done without the. use of tar for the purposevof uniting the parts or sections of material and is done without any distinctdividing-line between the old and new material.

In fact, there isno dividingline, be I use the new material has been mixed with 'and'becomes apart of the old niateria'l. As stated above, while heating the spot to be repaired the surrounding edges or portions must beheated to a greater or less degree, and the new material is worked into these edges, as-well as in the spot to be repaired, so that when hardened it is practieally impossible to tell where the pavement has been repaired. K I

What is claimed is- 1. The' method of repairing American asphalt pavement which consists in subjecting the spot to be repaired to a blast'of heat, add-' ing new material, and smoothing and bur- :nishing it substantially as described.

2. :The method of repairing asphalt pave ment which consists in subjecting the spot to be repaired to a strong'blast of heat, adding iew material, and smoothingand burnishing it substantially as described.

3. The method of repairing asphalt pave ment, which consists in subjecting the spot to be repaired and the surrounding edges to such a blastof heat as will cause the asphalt, at not only the spot to be repaired but the surrounding portion, to a greater or-less degree, to be reduced to the soft pliable state inwhieh it was originally laid, adding new material, ing vit. a

4. The method of repairing asphalt pavement, which consists'in'subjecting the spot to be repaired and the surrounding edges to such a blastiof heat as will cause the asphalt,

andfi nally smoothing, and bu rnishat not only thespot to be repaired but the surrounding portion,-to a greater or: less (19- gree, to be reduced to the soft pliable state in'whieh it was originally laid, agitating the soft material and mixing it with new'material, and finally smoothing and burnishing it.

THE UNITED sums marlin Y ,GUARAN'IY (10., By-VOLNEX W. FOS'JER, Prest.

\Vitnesses: V

LILLIA'N TILTON. M. 0. SMIT

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