US910922A - Process of removing asphalt pavement. - Google Patents

Description

A WQE. KERNS'. PRQGESS 0F REMOVING ASPHALT PAVEMENT.

APPLICATION FILED AUG. 14, 1905-. A

Patented J an; 26, 1909.

2 sums-SHEET 1.

, WITNESSES: IONVENTOR:

E. KBRNS. PROGES$ BEMOVINGASPHALT PAVEMENT. APFLIOATION FILED AUG. 14,1906.

910,922. Patented Jan. 26. "1909.

U ITED STATES FF @FHQE WILLIAM E. KERNS,

; PAVING COMPANY, or PHILADELPHIA,

.GINIA.

OF FOX CHASE, PENNSYLVANIA, ASSIGNOR TO THE BARBER ASPHALT:

PENNSYLVANIA, A CORPORATION OF WEST VIR- PBOGESS OF REMOVING ASPHALT PAVEMENT.

To all whom it may concern- Be it known that I, WILLIAM E. KERNS, of Fox Chase, in the countyof Philadelphia and State of Pennsylvania, have invented a certain new and useful Improvement in Processes of Removing Asphalt Pavement, whereof the following is a specification, reference being had to the accompanying drawmgs.

My invention is particularly applicable for removing the upper layer orlayers of sheet asphalt pavements laid between street curbs and car tracks. The process heretofore employed for removing such pavements requires that small fragments thereof shall be delimited with channels manually cut throughthe upper layeror layers, whichfragments are then raised manually by inserting crowbars in the channels surrounding them. Said known process is not only very slow but is extremely costly on account of'the amount of manual labor required.

Therefore, it is the object of my invention to provide a process by which such pave-.

ments can be removed more ra idly than heretofore and with less manual abor, and, as hereinafter described, it is characteristic of my process that no delimitation of the area of the pavement is necessary; only'a single initial cut or channel being required.

As hereinafter described, I find it convenient to employ for effecting my process, a truck arranged to traverse and be supported by the pavement which is to be removed; said truck having means arranged to overhang and engage the edge of said pavement, and means arranged to raise and lower said engaging means.

In the accompanying drawings; Figure I, shows an elevational view of said apparatus and a portion of the pavement in section. Fig. II, is a plan view of the apparatus and the pavement shown in Fig. I. Fig. III, is a perspective view of a portion of the hoisting apparatus. Fig. IV, is a side elevation of one of the hoisting hooks.

In said drawings, 1, is a truck provided with the supporting wheels 2, having the brake 3. Said truck carries the steam boiler 4, and engine 5, in operative relation with the winch 6. Said boiler and engine are mounted at the front end of the truck in order that they may counterweight the same when the hoisting apparatus at the rear end thereof is in operation. Said'hoisting appa- Specification of Letters Patent.

Application filed August 14, 1905. Serial No. 274,040.

Patented Jan. 26, 1909.

ratus comprises the triangular frame 7, from the apex of which is suspended the hoisting tackle comprising the fall block 8, having the ring 9, which carries the two chains 10, provided at their ends with hooks 11, one of which is shown in detail in Fig. IV. The arrangement described is such that said hooks 11, may be raised or lowered by the rope 17, which extends to the winch 6, the said rope 17 thereby simultaneously operating both hooks and applying an equal hoisting strain to two points on the edge of the pavement simultaneously. The shaft of the winch 6, being provided with the sprocket chain 20, extending to the axle 22, of the rear wheels 2, of the truck, and with the clutch 21, by which said chain may be rendered operative or idle, said truck may be propelled by said engine 5, to traverse the pavement 24, at the will of the operator.

By my process I find that it is possible in an ordinary city street, to remove the pavement 24, in sheets or strips 25, extending from the curb 30, to the proximate car track 31, and each having a surface area of approximately forty-eight square feet, without cutting or otherwise delimiting said strips. The initial ste of the process is to make a single cut or c annel through the upper asphalt layers of the pavement 24, down to its foundation; said channel extending from the curb 30, to the track 31, at right angles to the length of the street. The truck 1, is then caused to traverse the pavement until it is supported in such proximity to said out or channel that the hooks 11, can be inserted therein beneath the asphalt. The winch 6, is then operated by the engine 5, so as to raise the hooks 11, and thereby bend the free edge of the pavement upwardly until the pavement is fractured in a line parallel with the initial out; the distance of the line of fracture from the initial out or channel being variable in accordance with the thickness and limit of elasticity of the pavement, but beingapproximately four feet. I find that the result of startin with a substantially straight out running from curb to track and applying equal and simultaneous lifting stress to a plurality of points on this straight edge and along the line of fracture to be determined merely by the stress thus produced, results in the continuous breaking off of more or less rectangular pieces, each running from track to curb, from the end of the strip of pavement to be removed; thus elimi- I stantially at right angles to the curb; raising hating all the special labor Which is required I said free edge uniformly throughout its when the breaking up ofthe surface is effected by hand, inWhich case, instead of substantially rectangular pieces, the pavement is broken up into an indefinite number of Wholly irregular pieces, having no relation to each other, and Without the maintenance continuously of a line of fracture parallel to the original cut. Said fracture occurs before the free margin of the pavement is bent to a right angle v. ith the remainder of it, and then, While the free edge of the pavement is upheld by the hooks 11, the sheet or strip 25, of the pavement Which has been thus broken off, is supported adjacent to its fractured edge 35, by the insertion of stones or broken pieces of pavement 36. Then the tackle is owered to release the free edge of the pavement and the detached sheet or strip 25, tilts so as to raise its fractured edge 38, above the level of the pavement 24, and thus afford a crevice for the re-insertion of the hooks 11, beneath the new free edge of the pavement. The operation above described eing repeated, the pavement 24, may be fractured in lines parallel with the original cut or channel and ithout any delimitation other than the initial out.

Although I find it convenient to employ the apparatus above described, it is to be understood that other means may be employed for effecting the process described.

claim:

1. The hereinbefore described process of removing sheet asphalt street pavement, Which consists in making a substantially straight free edge on said pavement sublength until the margin of the pavement is fractured in a line substantially parallel with said free edge; and, then raising the fractured edge of said pavement uniformly throughout its length until the margin of the pavement is again fractured in a line substantially parallel with its free edge, sub stantially as set forth.

2. The hereinbefore described process of removing making a substantially straight free edge on said pavement sul stantially at right angles to the curb raising said free edge uniformly throughout its length until the margin of the pavement is fractured in a line parallel nith said free edge; providing a support beneath the detached strip ELLlJiLCGllb to the line of fracture; releasing said detached strip and thereb permitting its fractured edge to tilt upwardly on said support above the level of the pavement; then raising the fractured edge of said pavement uniformly throughout its length until the margin of the pavement is again fractured in a line substantially parallel n ith its free edge; then providing a support beneath the detached strip adjacent to its line of fracture and releasing said strip, as before, substantially as set forth.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this ninth day of August, 1905.

VVTLLIABT E. KERNS. T Vitnesses JAMES H. BELL, E. L. FULLERTON.

sheet asphalt street pavement r W rich consists in

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