US1659504A - Subgrade planer - Google Patents

Description

' Feb. 14, 1928.

. 1,659,504 a. E. WEBB SUBGRADE PLANER Original Filed Jan.6, 1922 2 Sheets-$heet V Tic-.1.

Feb. 14, 1928. 1 ,659,504 a. E. WEBB SUBGRADE PLANER Original Filed Jan. 6, 1922 2 Sheets-Sheet 3 Patented Feb. 14, 1928.

UNITED stares PATENT GEORGE Evans wEfia oE manage Ass eneit massing coil:-

, PANY, E MILWAUKEE, WISCONSIN, A conroBA'rIon.

mam E 1 Original application area January 6,1922, Serial No. 527323; his incaa'ad'a s n 5, 1922. Divided and this applicationfiled February 21, 1925. Serial Nb. 10,932.

This application is a division of my 'pend ing application, Serial No. 527 ,423, filed January 6, 1922, covering subgrade planer;

The invention embodies a subgrade dirt 5 cutting and leveling machine, having special provisions for cutting work and for causing the dirt acted upon or removed to be leveled by certain scraping or leveling *appliances."

The invention also involvescertain combination means whereby a suhgrade planer may be readily "employed as an attachment to a "portable road machine, as for instance, a concrete paver, and the two operated in conjunction withone another by the smgle power plant of the portable machine.

An understanding will be had of the detail construction of the planer and its mode of use in connection with a cooperating ma chine for propelling it, on referenceto the following description, and accompanying drawings, in which latter the figures may be briefly described as follows Figurel is a. fragmentary view ofthe rear end of a conventional type of a concrete paving machine, showing my subgrade finishing device cooperatively associated there with.

Figure 2 is a top plan View ot the i sjubgrade finishing device, the endless tracks and front axle of a paving machine being shown in diagrammatic manner iorthe purpo e of illustrating the manner of attaching the device of the invention to the paver,

Figure 3 is an .enlarged transverse sectional view through the finishing device or earthplaner.

Figure 4 is a rear view of the finishing device.

Figure 5 is an enlarged detail view of a portion of the forward scraper and the scarifying teeth which are associated there'- with.

Describing my invention specifically, Figure 1 illustrates the subgrade planer arranged at the rear end of the payer, thelatfter only partly shown, and the distributing means is of the boom and buckettype, boom being designated by the number 1 and the bucket by the number 2 The inultrplanes of the paver are designated 2, a'nd the rear axle 2 The planer or finlshingfdevice as a unit is designated B and is adapted to be propelled by the paver A being shown as having a connection with the axle 2" and bein located adjacent to the multiplanes 2. In t liS position the suhgrade finisher is 10- catedbetween the point occupied by the dis-- tributing bucket 2 at its inner position on the boom, and the multiplanes 2 so that it does not interfere in any manner with the 0 niovernentsof the bucket along the boom or prevent the mixed concrete batches from be ing deposited u on the subgrade at any point in theitra'vel o the bucket along the boom.

The frame of this form of subgrade finish er includes spaced and substantially parallel transverse beams 21 and 22 which are connected at "intervals in their length by the cross pieces 23. The ends of the frame are each provided with a pair of flanged rollers 7 24 which are adapted to travel upon the usual road rails or forms O. Horizontally disposed rollers 24 are also shown as arranged at the ends "(it the frame for en age inent with the road rails C to assist in olding the name against lateral displacement. A transversely extending scraper 25 is seeuie'd to the cross pieces 23 at a point somewhatto the rear of'the front transverse beam 21, and a channel bar 25 is shown as as'sotoen'gage thesurface of the subgrade and is tdrwardlyinclined so that it can act effectively updn any elevations of the subgrade toplanebrcut the same away. Associated with the frontsera er 25 is a series of teeth 26,said teeth being shown as secured thereto add extending downwardly along the front thereof. The purpose of these teeth is to assist in breakin up or rooting up the hard spots in thejsuriiaee of the subgrade so that the device willoperalte effectively to remove any high places in the subgrade. The loosened earth inay be deposited in low plates so to fill the same, or, ifit accumulates'in *sufiicient quantities in front of the sdraper 25 it will press over the top ed 'e of the scraper and drop upon the subgrade at the rear bit the scraper. The space between the time scraper 25am the front beam 21 is suflicient to permit of this passage of the Tdoseri'ed earth over the top of the front scraper in the manner indicated.

The rear beam 22 of the frame is provided with a rear scraper 27 which isrshown as disposed in a substantially vertical position. This scraper projects downwardly into engagement with the surface of the subgrade mulating in front of the rear scraper will be deposited in the .low places so as to fill in the same. If an excessive quantity of loose earth should accumulate in front of the rear scraper, it would pass over the same, in which event it would have to be manually removed from the subgrade, although this is a contingency which would not ordinarily happen if the preliminary work of grading had been properly done. Under someconditions it might be necessary for a workman to shovel some loose earth between the two scrapers in order to provide sufficient material for filling in the depressions.

The connection between the subgrade finisher and the paving machine is such that it is possible to alter the relative position of the two devices and position the paving machine at either side of the center of the road, as may be necessary to obtain the most effective results. A yoke member 28 is slidably associated with the axle 2 of the traction devices 2 of the paver and carries a wheel 29 which is adapted to travel back and forth upon the axle in much the manner of a trolley. The yoke 28 is connected by a pair of rearwardly diverging draw bars 30 to the frame of the subgrade finisher. The connection is such that the finisher is pulled along after the paver and propelled thereby, although the paver can be shifted laterally with respect to the finishing machine and positioned upon one side of the road or the other side, as may be desired.

The subgrade is finished and smoothed after the paver has passed over the same so that it is put in proper condition to receive the concrete just before the concrete is deposited thereon, and this is accomplished without interfering in any manner with the functioning of any part of the paver.

As is indicated more clearly by Figure 2, both the frontand rear scrapers may be formed so that they can be adjusted for dif ferent contours or configurations of the sub grade surface. As indicated, the rear scraper 2? is shown as formed in a plurality of sections which are adjustably secured to the rear beam 22 by fastening elements 31. By properly adjusting the scraper sections, the scrapers can be positioned at difierent elevations and also set for the desired contour of the subgrade surface.

Having thus describedmy invent-ion, what 1 claim as new and desire to secure by Letters Patent, is:

1. A subgra-de finishing device including a frame, traction members at the ends of the frame adapted to travel on the usual road rails, and a pair of transversely extending scraper elements carried by the frame, the forward scraper element being inclined and arranged so that loose earth will pass over the same and be deposited in the space between the two scrapers.

2. A subgrade finishing device including a frame formed of transverse beams connected by cross pieces, traction means for supporting the frame on the road rails, and a scraper carried by the cross pieces in a spaced relation to the beams so that loosened soil can pass over the upper edge of the scraper.

3. A subgrade finishing device including a frame formed of transverse beams connected by cross pieces, a scraper secured to the cross pieces at a point spaced from and adjacent to the forward beam so that dirt can pass upwardly over the scraper, and a second scraper secured to the rear beam.

4:. A subgrade finishing device including a frame formed with spaced transverse beams connected by cross bars, a scraper secured to the cross bars at a point spaced from and adjacent to the front beam, said scraper being inclined so that dirt will pass upwardly over the same, scarifying teeth arranged adjacent to the said scraper in cooperative relation thereto, and a second scraper secured to the rear beam.

5. A subgrade finishing device including a. frame formed of a pair of transverse beams connected by cross pieces, traction members 7 at the ends ofthe frames adapted to travel upon the usual road rails, a front scraper secured to the cross pieces in a spaced relation to the front beam so that dirt can pass upwardly between the scraper and front beam and fallover the upper edge of the scraper, scarifying teeth associated with the front scraper, and a rear scraper secured to the rear beam. 7

6. In combination with a traction device which includes an axle, of a subgrade finishing device mounted to travel upon the road rails, a trolley member movable back and forth upon the axle of the paver, and draft means between the trolley member and the subgrad'e finisher whereby the latter is connected to the paver in a trailing relation.

c 7. A subgrade finishing device including a frame mounted to travel over the subgrade, and a. pair of spaced scraping elements carried by the frame and arranged in a position transverse to the direction of movement thereof whereby materials accumulating between the scrapers will be deposited in the hollows or depressions of the road bed.

8. A subgrade finishing device including a frame mounted to travel over the subgrade, a pair of spaced scraping elements carried by the frame and the rear scraping element being arranged in a position transverse to the direction of movement of the frame, and scarifying teeth associated with the forward scraping element whereby elevations will be,

cut away by the forward scraper and the loose material deposited in the hollows by the rear scraper.

9. A subgrade finishing machine including a frame mounted to travel over the subgrade, a pair of spaced scraping elements carried by the frame and arranged in a position transverse to the direction of movement thereof, the forward scraper being inclined so that loose material will pass over the-same and accumulate in the space between the scraping elements where it will be deposited in the hollows by the rear scrap ng elements.

10. A subgrade finishing machine including a frame to travel over the subgrade, a pair of spaced scraping elements carried by the frame and arranged in a position transverse to the direction of movement thereof, the forward scraper being inclined so that loose material will pass over the same and accumulate in the space between the scraping elements where it will be deposited in the hollows by the rear scraping elements, and scarifying means associated with the front scraper.

In testimony whereof I afiix my signature.

GEORGE EVANS WEBB.

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