US1893559A - Subgrade planer - Google Patents

Description

E. H. LICHTENBERG ET AL 1,893,559

SUBGRADE PLANER Filed March 2. 1927 2 Sheets-Sheet Jan. 10, 1933.

Jan. 10, 1933. E. H. LICHTENBIERG ET AL 1,893,559

SUBGRADE PLANER Filed March 2. 1927 2 Sheets-Sheet 2- .9 Wd/Vehan Patented Jan. 10, 1933 UNITED STATES PATENT OFFICE ERICH H; LICHTENBERG AND WILLIAM A. NELSON, OF MILWAUKEE, WISCONSIN, ASSIGNORS T KOEHE-ING COMPANY, OF MIL'WAUKEE, WISCONSIN, A CORPORATION SUBGRADE PLANEB.

Application, filed March 2, 1927. Serial No. 172,015.

The present invention relates to improvements in road building apparatus, conventionally known as subgrade planers, designed to produce a smooth and uniform finish to the surface of the subgrade on which the concrete is deposited. An exemplification of such apparatus is disclosed in the prior patent to G. E. WVebb No. 1,534,046 dated April 21, 1925, these improvements representing developments of the construction therein set forth and embodying novel structural changes giving rise to improved results, greater facility of adjustments made necessary by modification of the road bed contour,

and assisting materially in the laying of reinforcing elements now frequently specified for concrete roads.

With reference to the last mentioned feature, heretofore in building wide concrete roads it was the custom to lay the concrete in a. continuous mass across the width of the road, but owing to the tendency to fracture at the crown and near the sides it is now found desirable to employ a center or expansion strip and longitudinally arranged reinforcing rods at either side thereof and at the edges of the road to prevent these ruptures from occurring, and the subgrade planer constituting this invention includes supporting means for pred'etermining the proper positioning of such rods with relation to the center and side lines of the road as well as to the depth of embedment in the concrete material.

3D I u a i a 11 1e accompanyin c rawin s.

Figure 1 is a perspective view of a subgrade planer constructed in accordance with my invention and arranged in cooperative relation to the paving machine utilized for moving the device over the suhgrade;

Figure 2 is an enlarged view showing the center casting block for connecting the two frame sections of the planer together;

Figure 3 is a transverse sectional View through the center block casting shown in Figure 2 and illustrating the arrangement of the scarifying teeth and scrapers employed in connection with the device;

Figure 4 is a detail view of'a scraper blade and spacing block used in connection therewith;

Figure 5 is a fragmentary perspective view of the sectional frame member for supporting the scarifying teeth;

Figure 6 is a plan view of one of the draw bars and the hub cap connection therefor;

Figure 7 is a detail view of the connection of the draw bar to the planer device;

Figure 8 is a detail view in side elevation of the roller supports and mounting for the planer frame;

Figure 9 is a top plan view of the support shown in Figure 8;

Figure 10 is a perspective view illustrating the manner in which the center strip for the concrete road is arranged in relation to the reinforcing rods associated therewith;

Figure 11 is a sectional view showing more clearly the use of common fastening means for the clamping clips used for connecting the teeth to the planer frame; and

Figure 12 is a fragmentary view in side elevation showing the coaction of the sprinkler control with the tractor control means.

Like reference characters designate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, the planer device which forms the special subject matter of this invention is designated generally by the character A. This device is mounted upon the road form rails B and is designed to be connected .to a paver device indicated generally by the letter C. It is to be understood, however, that it is not essential that this planer be associated with the paving apparatus but it is convenient to operate the planer along with the paver device and for this reason I prefer to attach the planer to the paver by means of the draw bars D, each of which is connected at its forward end to a special hub cap E which is secured to the multiplane tractor and at its rear end to the forward frame member of the planer by means of the bracket F. It will be understood that the planer is therefore drawn along by the paver apparatus and does not interfere with the operation of the latter. In the illustration shown in Figure 1 the bucket 100 tail in Figure 4 of the drawings.

G will move freely over the planer device to effect deposit of the concrete upon the sub grade which has been finished by the planer in its movement over the same.

The planer device itself is composed of two sections designated 1, 1a, these sections being spaced from each other and connected by a saddle block or casting 2. The position of this block corresponds with the central portion of the road bed and as shown in Figure 2 of the drawings it permits the laying of the center strip H constituting the joint for the road bed. The saddle block provides a. rigid support for the contiguous ends of the frame sections each of which is provided with a channel end bar 3. To this bar is connected :1 pair of rollers 4, one at the forward end and one at the rear end, said rollers being mounted upon adjustable brackets 5 each provided with a series of vertically arranged apertures 6 for receiving the fastening bolts 7. The height of the frame with respect to the subgrade is readily regulated by the adjustmentof the roller brackets 5 with relation to the frame bars 3. Each of the frame sections 1 and 1a, furthermore, is composed of a front beam 8 and a rear beam 9, the former being composed of a pair of angle irons 8 arranged in rev-rse relation to each other as shown most clearly in Figure Upon the angle iron of this beam are mounted the scarifying instrumentalities or teeth 10 which are adjustably secured to the front and rear faces of the beams in staggered relation by means of the fastening clamps 11. t will be noted by reference to Figure 1.1 that the arran 'ement of these clamping devices is such as to enable the employment of a common fastening bolt 12 for oppositely disposed clamping elements.

The rear beam 9 of each frame section is channel-shaped as shown most clearly in Figure 3 of the drawings, and to the forward fiat face thereof is secured a series of blades or scrapers 13 one of which is illustrated in de- ,These blades are curved in configuration and provided with slots 14 to receive the fastening bolts 15 by means of which the blades are mounted for vertical adjustment depending upon the contour of the subgrade. To enable the attachment of these blades in the manner shown there is employed a spacing block 16 having a flat face at one side and a concave face at the other side conforming to the rear face of the blade.

As a further detail of the arrangement of teeth it will be noted in Figure 1 of the drawings that certain teeth 10 are secured at an angle so as to take care of the surface lying between the ends of the frame sections. All of these teeth are capable of vertical adjustment so as to correspond in their relative positions to the positions of the scrapers and as required by the contour of the subgrade which is to be operated upon.

Refer ing again to Figure 2 of the drawings, it will be observed that the saddle block at each side of its inner wall is provided with rod supports 2a upon which reinforcing rods may be laid as the operation of the machine takes place and the function of this construction will be apparent by reference to Figures 2 and 10 of the drawings. The reinforcing rods designated I at the center or crown of the road should lay in spaced relation to the center strip H and the sup ports 2a will hold these rods at the proper elevation and proper spaced relation during the progress of the concrete laying so that they will be uniformly positioned in the concrete material.

WVith reference to the reinforcement of the sides of the road bed, the corresponding reinforcing rods'are sustained in their proper relation to the concrete by the end channel bars 3 of the planer frame. As shown in Figure 1 of the-drawings, the rod is adapted to rest upon the lower flange of the channel bar which prescribes the point at which the rod is embedded in the concrete.

It will be understood, however, that the reinforcing rods need not be used in conjunction with this apparatus where they are not prescribed in the specifications for a road to be constructed. lVherever they are required, however, the supporting means which we have provided in conjunction with our planer device very greatly facilitate the laying opera tion of these members. When the reinforcing rods are not used the space between the ends of the frame sections 1 and 1a may be operated upon by attaching a blade 13 to the saddle block in such a manner as to span the space between the frame sections.

Figure 10 is a sectional view of the road bed where the concrete has been deposited upon the subgrade. The center strip H is first positioned upon the subgrade along the center line by means of the stakes J. When in this position it passes readily beneath the paving apparatus and between the ends of the frame sections as shown clearly in Figure 2 of the drawings.

A feature of prime importance in this apparatus, the sprinkler attachment, will now be referred to in detail.

It is usually desirable in the preparation of the subgrade surface to moisten or sprinkle the same prior to the deposit of the concrete thereupon, and it is therefore an object in view to provide in conjunction with the finishing unit, sprinkling means for this purpose. .Vhile it is comprehended that such sprinkling means may be controlled at will by the operatorof the machine, yet it is found extremely practicable to render the functioning of the control of this apparatus substantially automatic so as to insure synchronism with the movement of the machine and solely during the period of such movement.

To this end we have provided a service pipe L leading from a suitable water supply (not shown) preferably carried by the tractor apparatus. Referring to Figure 12, this supply line has a vertical portion L extending through the motor housing N adjacent to the steering wheel column 0, and this is provided with a two-way valve A link Q connects this valve with the tractor control lever B- mounted on the column so that when said lever is shifted to produce movement of the apparatus in the customary manner, the water supply is automatically turned on to fiow water from the line L. When the machine is stopped, simultaneously and automatically the valve is closed and the water ceases to flow.

The service line L is connected to the sprinkler heads N, one of which is mounted on each section 1 and 1a in suitable brackets h and these heads are connected together by a branch M spanning the joint between the sections. The full width of the subgrade surface is thereby sprinkled during the moving up periods only.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States, is

1. In a subgrade finishing device, a frame mounted to travel over the road bed and comprising a pair of frame sections disposed in end to end relation and having their adjacent ends spaced from each other so as to leave a free clearance space therebetween, means rigidly connecting the said adjacent ends and spanning the said space, and means intermediate the outer ends of the frame sections for laying and guiding reinforcing rods along the subgrade.

2. In a subgrade finishing device, a frame mounted to travel over the road bed and comprising a pair of frame sect-ions disposed in end to end relation and supported solely at their outer ends while having their adjacent ends spaced from each other so as to leave a free clearance space therebetween, and a saddle bloc r rigidly connected to the adjacent ends of the section and arching over the space between said ends, and means intermediate the outer ends for laying reinforcing rods along the subgrade. 7 3. In a subgrade finishing device, a frame mounted to travel over the road bed and comprising a front transverse beam and a par allel rear beam, teeth adj ustably mounted in staggered relation at opposite sides of one of said beams and finishing means common to opposing teeth, and scraper means adjustably mounted on the other beam.

i. In a subgrade finishing device, a frame, subgrade finishing elements mounted thereupon and supported solely upon their outer ends, rollers for supporting said frame to travel upon the side road form rails, bracket members connecting said rollers to the frame, and means for adjusting the roller brackets to adjust the finishing elements in relation to the subgrade, and means intermediate the outer ends for depositing and guiding reinforcing rods along the subgrade.

5. Road building apparatus of the class described comprising a. frame supported solely upon its outer extremities and mounted to travel over the road bed, rod supports on said frame disposed in spaced relation to support reinforcing rods in parallelism above the subgrade and to guide therods as they are deposited in the movement of the frame over said subgrade, and means for adjusting the rod supports in relation to the subgrade.

6. Road building apparatus of the class described comprising a frame mounted to travel over the road bed and composed of side sections disposed end to end in spaced relation, means rigidly connecting the adjacent ends of the sections so as to leave a clearance space therebetween to accommodate a center road strip, and means carried by the adjacent ends of the sections to support road reinforcing rods and guidingly deposit said rods at opposite sides of the said strip in the movement of the frame over the subgrade.

7. Road building apparatus of the class described comprising a frame mounted to travel over the road bed and composed of side sections disposed end to end in spaced relation, means rigidly connecting the adjacent ends of the sections so as to leave a clearance space therebetween to acconnnodate a center road strip, rod supports carried by the adjacent ends of the frame sections in the clearance space aforesaid, and other rod supports carried by the opposite ends of said frame sections.

8. The combination with a portable road building machine, of a subgrade finisher eX- tending transversely of the road bed to be finished, draw bars connecting the road finisher to the road building machine, means for supporting the subgrade finisher in spaced relation to the surface of the subgrade, subgrade finishing elements carried by said frame, and reinforcing rod supports disposed centrally of the frame and at the ends thereof.

9. In apparatus of the class described, the combination of a tractive support, finishing means operative upon the subgrade surface, sprinkling means operative to sprinkle the subgrade during movements of the tractive support, and instrumentalities for operating the sprinkling means automatically and synchronously with and responsively to movements of the tractive support and being effected only during movements of the tractive support over the subgrade.

poured thereon, and means for automatically turning on the water to said sprinkler when the machine is moved over the road bed and to turn the same off when the machine comes to a stop.

21. The combination with a. paving machine arranged to move over a road bed and pour concrete thereon, of a subgrade levelling machine attached to said paving machine for movements therewith for action on the road before the concrete is poured thereon, of a sprinkler carried by said levelling machine for distributing water on the road bed therebehind and ahead of the portion of the road being covered with concrete, the water supply for said sprinkler being controlled from the paving machine by the operator thereof.

22. The combination with a paving ma chine arranged to move over a road bed and pour concrete thereon, of a subgrade levelling machine attached to said paving machine for movements therewith for action on the road before the concrete is poured thereon, of a sprinkler carried by said levelling machine for distributing water on the road bed therebehind and ahead of the portion of the road being covered with concrete, the water supply of said sprinkler being controlled manually.

23. Apparatus of the class described, comprising, in combination, a tractive support, subgrade finishing means carried by the support and operative upon a subgrade surface, the finishing means including sprinkling instrumentalities, control means for the tractive support, and instrumentalities comprising' a link connected with the control means of the tractive support for automatically synchronizing the operation of the sprinkling instrumentalities with operation of the control means to effect actuation of the sprinkling instrumentalities simultaneously with actuation of the tractive support and only during progress of the apparatus along the subgrade.

24. In an apparatus of the class described, the combination of a portable support, subgrade finishing means associated for movement therewith and operative upon a subgrade surface, sprinkling means mounted upon the support and a single means for causing simultaneous movement of the support and sprinkling action of the sprinkling means.

25. In concrete distributing apparatus of the class described, the combination of a portable support arranged to advance over a subgrade, means mounted thereon for advance movement therewith to distribute concrete on the sub-grade, a sprinkler system coacting with said support, control means for causing advance movement of said support and oper ation of the sprinkling means, and instrumenta-lities connected with the control means for rendering the sprinkling means automatically responsive and simultaneously operable with the operation of'the support on; the subgrade. 7

26. In an apparatus of the class described the combination of a tractive support, a sprinkler system carried by said support and including a sprinkler distributinghead extending transversely of the sub-grade on which the tractive support is adapted to move, and means for causing said sprinkling system to be automatically operative during movement ofthe tr-active support and nonoperative upon discontinuance of the movement" cf said 'trac-Live support.

2?. In apparatus of the class described, the combination of a tracti've support, sub-grade finishing means operative upon a sub-grade surface and propelled along the surface by the tractive support, sprinkling means carried by the finishing means for sprinkling the sub-grade, control means for causing movement an d stoppage of said tractive support, separate control means for the sprinkling means, and means including a connecting link for interconnect 1g the above said control means to render one of the said means operative by the other to cause automatic synchronized operation of the sprinkling means with the operation of the tractive support during progress of the apparatus along the subgrade.

28. In apparatus of the class described, the combination of a tractive support arranged for movement along a subgrade, power means for effecting movement of the support, a sprinkling system cooperatively arranged with respect to said support and including a control valve, and means including a link connecting the control valve with the power control means for causing automatic synchronized operation of the sprinkling means with the operation of the tractive support whereby sprinkling of the sub-grade may be effected simultaneously with the movement of the support.

29. In a sub-grade finishing device, a frame mounted to travel over a road bed to be finished and comprising a pair of frame sections disposed in end to end relation supported solely at their outer ends while having their adjacent ends spaced from each other so as to leave a free clearance space therebetween, a saddle block ri idly connected to the adjacent ends of the sections and arching over the space between the ends, and road reinforcing rod supports carried by the adjacent frame in the space between the adjacent ends of the sections.

30. Sub-grade finishing apparatus of the class described comprising a frame mounted to travel over the road bed and composed of frame sections disposed end to end in spaced relation, means rigidly connecting the adjacent ends of the sections so as to leave a clearance space therebetween to accommodate road reinforcing rods.

31. Sub-grade finishing apparatus of the class described comprising a frame mounted to travel over the road bed and composed of side sections disposed in end to end spaced relation, means for rigidly connecting the adjacent ends of the sections together so as to leave a clearance space therebetween to accommodate road reinforcing rods, and rod supports carried by the frame and arranged in the intermediate space between the adjacent ends of the sections for supporting the reinforcing rods.

In testimony whereof we afiix our signatures.

ERICH H. LICHTENBERG. WILLIAM A. NELSON.

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