US3248152A

US3248152A - Vehicular router having vertical cylindrical tool

Info

Publication number: US3248152A
Application number: US181889A
Authority: US
Inventors: Henderson Richard Sewall; James R Hunter; Evan N Manning
Original assignee: S AND E PIPE LINE CONSTRUCTION
Current assignee: S AND E PIPE LINE CONSTRUCTION; S AND E PIPE LINE CONSTRUCTION CO
Priority date: 1962-03-23
Filing date: 1962-03-23
Publication date: 1966-04-26
Anticipated expiration: 1983-04-26

Description

A ril 26,1966 R. s. HENDERSON ETAL 3,248,152

VEHICULAR ROUTER HAVING VERTICAL CYLINDRICAL TOOL Filed March 23, 1962 2 Sheets-Sheet 1 Lil INV EN TORS R 6. Henderson H. Hunfer I 5/11 Man/101 April 26, 1966 HENDERSQN ET AL 3,248,152

VEHICULAR ROUTER HAVING VERTICAL CYLINDRICAL TOOL Filed March 23, 1962 2 Sheets-Sheet 2 FIG. 5

'II'IJI Fill IN V EN TORS RS. Henderson I 5. f/anzer EM Mannzhg United States Patent Ofi ice 3,248,152 Patented Apr. 26, 1966 Pipe Line Construction Co., 11832 S. Bloomfield, Santa Fe Springs, Calif.)

Filed Mar. 23, 1962, Ser. No. 181,889 The portion of the term of the patent subsequent to Feb. 12, 1982, has been disclaimed Claims. (CL 29941) This invention relates to a pavement cutter and is more particularly concerned with a vehicular routing machine for routing channels in pavement surfaces along random cracks therein.

It is not infrequent that pavements of concrete, asphalt, and the like, crack or fracture along random lines, as a result of settling and/ or shifting of the sub-grade. Once a crack or fracture is established in a pavement, a Working joint is established thereby which normally enlarges or opens up as time passes and the movement is subjected to normal use. Still further, water enters such joints and washes the sub-grade out and/ or freezes so as to open the joint further and set up forces which create additional cracks and joints.

As a result of the above, many square miles of pavement and other similar surfacings 'are destroyed and rendered useless each year at the expense of many millions of dollars to the public and to private concerns. In an effort to correct or retard destruction or deterioration of pavements which have cracks therein, it is the present day practice to lay or pour a suitable sealing compound along the cracks as they develop. Unfortunately, the sealing compounds normally serve merely to cap the cracks, in a manner similar to laying strips of tape, or

the like over the cracks, and rarely enter the cracks to effectively seal them. The sealing compounds, as normally employed, are subject to being worn away, displaced by impact, and separating from the pavement as a result of temperature changes, and the like. Still further, since such sealing compounds are not contained they must, necessarily, be of such nature that they will set up rather hard, and as a result the seal established thereby is readily destroyed.

An object of this invention is to provide a novel means for establishing upwardly opening sealing compound receiving grooves along random cracks in a concrete pavement, or the like.

Another object of the present invention is to provide a novel, power driven, vehicular routing machine having an elongate frame and a pair of laterally spaced support wheels at the rear of the frame, a vertical fork pivotally connected to the front end of the frame, a pair of laterally spaced drive wheels carried by the fork, and means for pivoting the fork relative to the frame.

It is an object of this invention to provide a routing machines of the characterreferred to having a vertically disposed cylindrical routing tool occurring in a vertical plane intermediate to the drive wheels, and intersecting the pivotal axis of the fork, a drive motor for the tool carried by the fork, a drive means for the drivewheels including a motor carried by the fork, and a variable speed. transmisison driven by said motor.

Anotherobject of this invention is to provide a generator plant at the rear end of the frame supplying current to the motors.

It is a. further object of the present invention to provide a routing machine of the character referred to which is highly maneuverable and such that the routing tool can be easily and conveniently guided along random cracks in a pavement over which the machine is operated.

The various objects and features of our invention will be fully understood from the following detailed description of two typical preferred forms and application of our invention, throughout which description reference is made to the accompanying drawings, in which:

FIG. 1 is a side elevational view of our new routing machine;

FIG. 2 is a plan view of our new machine;

FIG. 3 is an enlarged view of a portion of the structure shown in FIG. 1;

FIG. 4 is a view taken as indicated by line 44 on FIG. 3;

FIG. 5 is a view taken as indicated by line 55 on FIG. 3;

FIG. 6 is a view taken as indicated by line 66 on FIG. 4.

FIG. 7 is a view similar to FIG. 3, reduced in scale and showing another form of our invention.

FIG. 8 is a view taken as indicated by line 8-8 on FIG. 7.

The routing machine provided by the present invention includes, an elongate body B having a flat, horizontally disposed platform P, and a central forwardly projecting frame F. The platform P is established of a flat, horizontally disposed, substantially rectangular steel plate having front and

rear ends

10 and 11, parallel sides 12, and flat top and bottom surfaces 13 and 14.

The frame F is an elongate member fabricated of steel channel, and has a horizontally disposed rear portion 15 fixed to the bottom surface 14 of the platform, as by welding, a central portion 16 projecting forwardly and upwardly from the rear portion 15, and a horizontally disposed front portion 17 projecting forwardly from the upper forward end of the central portion.

The base of the channel establishing the rear portion 15 of the frame is disposed upwardly and opposes the bottom surface 14 of the platform, while the base 18 of the channel establishing the front portion 17 of the frame is disposed downwardly and the flanges 19 thereof are relieved or cutback at the foremost end of the frame, as clearly illustrated in the drawings, and so that the front end of the channel base 18 establishes a suitable, unobstructed, mounting surface for other elements of the construction, as will hereinafter be described.

The rear portion 15 of the frame is of limited longitudinal extent and terminates at a point spaced forward platform, rearward of the frame F. The axle housing 20 extends transversely of the platform and is shown fixed thereto by means of suitable mounting pads 21. An axle member 22 is engaged through the housing 20 to project from'the opposite ends thereof and from the opposite sides 12 of the platform. A supporting wheel W is rotatably mounted at each end of the axle member.

The supporting wheels W can be of any suitable construction and are indicated as conventional automotive type wheel assemblies including pneumatic tires.

The forward end of the frame F is provided with a suitable bearing C to rotatably mount a truck T thereto. The truck T is fabricated of steel, having a flat, horizontally disposed rectangular plate-like bed 25 with front and

rear ends

26 and 27, parallel sides 28 and flat top and bottom surfaces 29 and'30, a fork 31 having laterally spaced legs 32 fixed to and projecting upwardly from the top surface 29 of the bed, adjacent the forward corners thereof, and an elongate, horizontally disposed header 33 extending between the upper ends of the legs 32, a vertical bearing spindle 34 fixed to the header 33, interof the bed is an elongate tubular axle housing 36, the

axis of which intersects the central vertical axis of the spindle 34.

An elongate axle member 37 is rotatably engaged in the housing 36 to project from the opposite sides thereof and from the opposite sides of the bed and has a pair of supporting and driving wheels 38 fixed to its opposite ends.

In the particular case illustrated, the bearing C has an annular mounting flange 39 fixed to the bottom surface of the channel base 18 of the frame F, and has an upwardly projecting conical housing 40 projecting through an opening 41 provided in the said base of the channel and into which the spindle 34 projects.

Since the details of construction of the bearing C can vary widely without affecting the novelty of this invention, we will not burden this specification with further unnecessary illustration and description thereof.

The fork 31 of the trucks T is fabricated of sections of channel steel. The bases of the channel sections establishing the legs of the fork 31 are disposed laterally inwardly, and the base of the channel section establishing the header is disposed upwardly.

The spindle 34 is shown provided with a mounting flange, which flange is fixed to the base of the header, as

clearly illustrated in the drawings.

A drive means D is provided for the wheels 38,WhiCh means is shown as including an electric motor M with a variable speed transmission 0 mounted on the top surface 29 of the bed 25 rearward of the fork 31, a drive sprocket 40 on the output shaft 41 of the transmission T, a drive sprocket 42 on the axle 37, and a drive chain 43 engaged about and extending between the said spockets.

The transmission 0 is provided with an operating or control lever 44 which lever is connected with a manually engageable operating lever 45 fixed to the outer end of the tiller by means of a flexible cable 46.

The transmission 0 is preferably a positive drive trans mission and is such that it can vary the rate of lineal movement of the machine from zero to approximately 15 feet per minute.

The motor M is supplied with current through a power line L extending through a guide G fixed to the bearing housing and thence rearwardly to a power source S on the platform.

The power source S can be an electrical cable extending from a primary source of electric current remote from the machine. However, in the preferred carrying out of the invention, and as illustrated in the drawings, the power source S includes a generator unit involving an internal combustion engine 50 driving a dynamo electric machine 51 and mounted on the top surface 13 of'the platform as clearly illustrated in the drawings.

In practice, the power supplied to the motor M is under control of a suitable switch (not shown) which switch is under control of a suitable control lever 52 provided on the tiller 35 adjacent the operating lever 45.

The outer end of the tiller 35 can be provided with a suitable hand grip '35 as illustrated in the drawings.

With the construction thus far described, it will be a parent that the truck is stabilized by the Wheel-supported frame, and that the truck serves as a tractor for the wheeled frame, which frame carries the generating unit or power source S.

It will be further apparent that the truck is turned and guided by means of the tiller 35, is highly maneuverable, and that the frame, being pivotally connected with the truck, merely trails or follows the truck.

In addition to the foregoing the machine that we pro- 4. cylindrical router or cutting tool 60, drive means E for the cutting tool, and mounting means E for shiftably supporting the means E and the tool 60 on the truck.

The cutting tool 60 can vary Widely in form, but is preferably a simple length of tool steel having a metallic matrix about its lower exterior, in which is embedded industrial diamonds. v

The drive means E is a high speed electric motor 61 having a suitable tool chuck 62 on itsoutput shaft 63 in which the cutting tool 60 is releasably engaged.

The mounting means E for the motor 61 includes a flat elongate, vertically disposed mounting pad 64 having flat front and

rear surfaces

65 and 66 and a pair of laterally spaced rearwardlyprojecting apertured tabs 67 adjacent the upper end of the pad.

The pad is slightly less in lateral extent than the distance between the legs32 of the fork 31 and is arranged adjacent the front of the truck with its rear surface 66 engaged and stopped against the front end 26 of the mounting pad 25, and with the apertured tabs 67 thereon projecting rearwardly between the legs of the fork where they pivotally receive or engage pivot pins 68 carried by and projecting laterally inwardly from said fork legs. The pins 68 can be in the form of bolt type fasteners, as indicated in the drawings.

The motor 61 is mounted on the front surface 65 of the pad with its central axis and that of the cutting tool 60 carried thereby, in a vertical plane common with the central longitudinal vertical plane of the truck.

Still further, the pad 64 is positioned vertically relative to the truck and the motor 61 is positioned vertically relative to the pad, so that there is adequate working clearance between the pad and the surface over which the machine is operated, and so that the tool 60, which is of predetermined longitudinal extent, projects below the surface of the or into the pavement over which the machine is operated, a predetermined distance.

It will be apparent from the foregoing that the pad and the axis of the cutter are normally vertical, but that when desired, the pad, with the motor 61 and tool 60 related thereto, can be pivoted forwardly and upwardly relative to the truck and to a substantially horizontally disposed position, as indicated in phantom lines in FIG. 3 of the. drawings, and where the cutter is spaced above and clear of the pavement.

includes flushing means for cleaning and cooling the. cutting tool and for flushing cuttings from the groove established in the pavement by the cutting tool.

The flushing means is shown as including a flat,hori zontally disposed, sheet metal splash plate 70 fixed to the lower end of the pad and projecting forwardly therefrom and having a forwardly opening notch to provide visibility r and accessibility to the cutting tool, and a fluid supply means including a fluid duct 71 carried by the pad and having a nozzle 72 at one end thereof to occur below the splash plate and disposed towards the cutting tool, and a hose coupling 73 at its other end with which a suitable fluid conducting hose 74 is connected.

In the preferred carrying out of the invention, the

fluid supply means includes a pipe 75 extending longitudinally of the platform, having a control valve 76 at'its forward end, to which the hose 74 is connected, and a hose coupling at its rear end to which a supply hose is connected and from which the said supply hose can trail. It will be apparent from the foregoing that when the construction is in operation, fluid, such as water, is directed onto the cutting tool and serves to cool the tool andto clean or flush the tool and the groove established thereby.

In operation the generating unit is set into operation, the motors M and 61 are energized and the transmission 0 is set in its zero or stopped position. The pad 65 which is initially in its up position is pivoted downwardly, swinging the rotating cutter 60 into engagement with the pavement. When the tool 60 is fully engaged in the pavement and is in a vertical position, the transmission 0 is adjusted, by means of a lever 45, to start the machine in motion across the surface of the pavement.

The speed at which the machine travels is dependent the cutter and into the channel or groove established by.

the cutter, to prevent excessive heating of the tool and to flush the cuttings away.

It is of particular significance to note that the drive wheels 38 are spaced laterally of the central longitudinal axis of the construction and of the cutter so that as the machine is advanced and maneuvered across a pavement surface, the wheels 38 will not engagein and be itnerfered With by the channel or groove established by the cutter and in such a manner as would bind or impede steering of the machine or cause undesirable and detrimental forces to be exerted onto and through the cutter.

It is to be understood that in practice the tool 60 can be arranged other than on a vertical axis. Such variation may be desired or required, as a result of the grade of the pavement, the angle of the crack or fracture being opening or, the particular design of the tool per se.

In the form of the invention illustrated in FIGS. 1 through 6, it will be noted that the vertical axis of the cutting'tool is spaced forward of the vertical axis of the truck. This spacing must be kept to a minimum in order to afford easy and accurate maneuvering of the construction.

In the form of the invention illustrated in FIGS. 7 and 8 of the drawings, the motor 61 is positioned between the legs 32 of the truck T with its central axis and that of the cutting tool 60 carried thereby in axial alignment with the central vertical axis of the truck. By so arranging the motor 61 and the tool 60' the cutter can be accurately guided along random cracks in pavement over which the machine is operated with extreme ease and without the exercise of any particular skill on the part of the operator.

In order to arrange the motor 61' and tool 60' in the manner set forth above, the forward end of the bed 25' is relieved, intermediate the legs of the truck, to accommodate the pad and the motor, and to establish a forwardly disposed edge 26' upon which the bed stops.

This second form of the invention further requiresthat the tabs 67' project forwardly rather than rearwardly from the pad, and that each wheel 38' be independently supported by a separate axle member 37' engaged in a suitable, separate, axle housing or bearing 36' fixed to the truck.

The wheels 38' being independently supported must be driven by the transmission 0. This is accomplished by providing'driven sprockets 42' on each wheel, a countershaft 43 extending transversely of and rotatably carride by the bed, rearward of the fork, a drive sprocket 44 at each end of the countershaft and a chain 45' engaged about and extending between the adjacent, related drive and driven sprockets, a driven sprocket 46' at the end of the countershaft adjacent the output shaft 41' of the transmission 0, and a drive chain 47' engaged The operator of the machine can with and extending between the sprocket 46' and the sprocket 40' on the output shaft of the transmission.

In all other respects, this second form of the invention is the same as the first form described hereinabove.

Having described only typical preferred forms and applications of our invention, we do not wish to be limited or restricted to the specific details herein set forth, but wish to reserve to ourselves any variations or modifications that may appear to those skilled in the art and fall within the scope of the following claims:

Having described our invention, we claim:

1. A vehicular routing machine of the character referred to including, an elongate frame with front and rear ends, a pair of laterally spaced support wheels at the rear end of the frame, a truck pivotally connected with the front end of the frame 011 a vertical axis and having a pair of laterally spaced drive wheels on axes intersecting the pivotal axis of the truck, a motor carried by the truck and driving the drive wheels, a second motor carried by the truck on a plane intermediate the drive wheels and having a downwardly projecting output shaft, an elongate cylindrical cutting tool releasably carried by the output shaft and depending therefrom and into the surface on which the machine is operated, and an elongate tiller fixed to and projetcing forwardly from the truck.

2. A vehicular routing machine of the character referred to including an elongate frame with front and rear ends, a pair of laterally spaced support wheels at the rear end of the frame, a truck pivotally connected with the front end of the frame on a vertical axis and having a pair of laterally spaced drive wheels on an axis intersecting the pivotal axis of the truck, a motor carried by the truck and driving the drive wheels, a second motor carried by the truck on a plane intermediate the drive wheels and having a downwardly projecting vertically disposed output shaft intersecting the axes of the drive.

wheels, an elongate vertically disposed cutting tool carried by the output shaft to depend therefrom and into the surface on which the machine is supported, and an elongate tiller fixed to and projecting forwardly from the truck.

3. A vehicular routing machine of the character referred to including, an elongate frame with front'and rear ends, a pair of laterally spaced support wheels at the rear and driving the drive wheels, a second motor carried by the truck on a plane intermediate the drive wheels and having a downwardly projecting output shaft, an elongate cylindrical cutting tool releasably carried by the output shaft and depending therefrom and into the surface on which the machine is operated, an elongate tiller fixed to and projecting forwardly from the truck, and a generator carried by the frame and supplying current to the motors,

4. A vehicular routing machine of the character referred to including, an elongate frame with front and rear ends, a pair of laterally spaced support wheels at the rear end of the frame, a truck pivotally connected with the front end of the frame on a vertical axis and having a pair of laterally spaced drive wheels on an axis inter secting the pivotal axis of the truck, a motor carried by the truck and driving the drive wheels, a second motor carried by the truck on a plane intermediate the drive wheels and having a downwardly projecting vertically disposed output shaft intersecting the axes of the drive wheels, an elongate vertically disposed cutting tool carried by the output shaft to depend therefrom and into the surface on which the machine is supported, an elongate rear ends, a pair of laterally spaced support wheels at the rear end of the frame, a truck pivotally connected with thefront end of the frame on a vertical axis and having a pair of laterally spaced drive wheels on axes intersecting the pivotal axis of the truck, a motor carried by the truck and driving the drive wheels, a second motor carried by the truck on a plane intermediate the .drive wheels and having a downwardly projecting output shaft, an elongate cylindrical cutting tool releasably carried by the output shaft and depending therefrom and into the surface on which the machine is operated, an elongate tiller fixed to and projecting forwardly from the truck, and flushing means for cooling and flushing the tool including, a nozzle carried by the truck and disposed towards the tool and a water supply hose coupled with'the'nozzle.

6. A vehicular routing machine of the character referred to including an elongate frame with front and rear ends, a pair of laterally spaced support wheels at the rear end of the frame, a truck pivotally connected with the front end of the frame on a vertical axis and having a pair of laterally spaced drive wheels on axes intersecting the pivotal axis of the truck, a motor carried by the truck and driving the drive wheels, a second motor carried by the truck on a plane intermediate the drive wheels and having a downwardly projecting vertically disposed output shaft intersecting the axes of the drive wheels, an elongate vertically disposed cutting tool carried by the output shaft to depend therefrom and into the surface on which the machine is supported, an elongate tiller fixed to and projecting forwardly from the truck, and flushing means for cooling and flushing the tool including, a nozzle carried by the truck and disposed towards the tool and a water supply hose coupled with the nozzle.

7. A vehicular routing machine of the character referred to including, an elongate frame with front and rear ends, a pair of laterally spaced supportwheels at the rear end of the frame, a truck pivotally connected with the front end of the frame on a vertical axis and having a pair of laterally spaced drive wheels on axes intersecting the pivotal axis of the truck, a motor carried by the truck and driving the drive wheels, a second motor carried by'the truck on a plane intermediate the drive wheels and having a downwardly projecting output shaft, an elongate cylindrical cutting tool releasably carried by the output shaft and depending therefrom and into' the surface on which the machine is operated, an elongate tiller fixed to and projecting forwardly from the truck, flushing means for cooling and flushing the too] including, anozzle carried by the truck and disposed towards the tool, and a water supply hose coupled with the nozzle, and a generator carried by the frame and supplying current to the motors.

8. A vehicular routing machine of the character referred to including an elongate frame with front and rear ends, a pair of laterally spaced support wheels at the rear end of the frame, a truck pivotally connected with the front end of the frame on a vertical axis and having a pair of laterally spaced drive wheels on axes intersecting the pivotal axis of the truck, a motor carried by the truck and driving the drive wheels, a second motor carried by the truck on a plane intermediate the drive wheels and having a downwardly projecting vertically disposed output shaft intersecting the axes of the drive wheels, an elongate vertically disposed cutting tool carried by the output shaft to depend therefrom'and into the surface on which the machine is supported, an elongate tiller fixed to and projecting forwardly from the truck, flushing means for cooling and flushing the tool including, a nozzle carried by the truck and disposed towards the tool and a water supply the front endof the frame on a vertical axis intersecting the central longitudinal axis of the frame, said truck having a pair of laterally spaced drive wheels on an axis intersecting the pivotal axis of the truck, a horizontally disposed rearwardly projecting bed, a forwardly disposed normally vertically disposed pad and a forwardly ;project-.

ing tiller, a motor with a variable speed transmission carried by the bed and coupled with the drive wheels, a second motor mounted on the pad, and an elongate, vertically disposed cylindrical cutting tool driven by the second motor and occurring on the central vertical plane of the truck and projecting downwardly and into engagement with the surface on which the machine is supported.

10. A vehicular routing machine of the character re ferred to including an elongate frame with front and rear ends, a pair of laterally spaced supporting wheels at the rear end of the frame, a'truck pivotally connected with the front end of the frame on a vertical axis intersecting the central longitudinal axis of the frame, said truck having a pair of laterally spaced drive wheels on an axis intersecting the pivotal axis of the truck, a horizontally disposed rearwardly projecting bed, a forwardly disposed normally vertically disposed pad and a forwardly projecting tiller, a motor with a variable speed transmission carried by the bed and coupled with the drive wheels, a second motor mounted on the pad, an elongate vertically disposed cylindrical cutting tool driven by the second motor and occurring on the central vertical plane of the truck and projecting downwardly and into engagement with the surface on which the machine is supported, and

j a. generator mounted on the rear portion of the frame and supplying current to said motors.

11.. A vehicular routing machine of the character referred to including,'an elongate frame with front and rear ends, a platform at the rear end of the frame, a pair of laterally spaced support wheels rotatably carried by and supporting the platform, a downwardly opening bearing housing at the front end of the frame, a truck arranged below the front end of the frame and having a flat horizontally disposed bed with front and rear ends, a fork having laterally spaced legs and a horizontal header fixed to and projecting upwardly from the front end of the bed, a vertically disposed spindle fixed to and projecting upwardly from the header and into the housing, a pair of laterally spaced drive wheels rotatably carried by the bed on axes intersecting the pivotal axis of the truck and supporting the truck, and an elongate forwardly projecting manually engageable tiller, a motor with a variable speed transmission carried by the bed and drive means between the transmission and drive wheels, a flat, normally vertically disposed pad arranged between the legs with its lower portion against the front end of the bed and its upper corners pivotally mounted to the legs, a second motor mounted on the pad to project forwardly there-;

from and having a downwardly projecting output shaft, and an elongate normally vertically disposed cutting tool carried by the output shaft and normally projecting into the surface over which the machine is operated.

12. A vehicularrouting machine of the character referred to including, an elongate frame with front and rear ends, a platform at the rear end of the frame, a pair of laterally spaced support wheels rotatably carried by and, supporting the platform, a downwardly opening bearing housing at the front end of the frame, a truck arranged below the front end of the frame and having a flat horizontally disposed bed with front and rear ends, a fork having laterally spaced legs and a horizontal header fixed to i and projecting upwardly from the frontend of the bed,"

a vertically disposed spindle fixed to and projecting upwardly from the header and into the housing, a pair of laterally spaced drive Wheels rotatably carried by the bed on axes intersecting the pivotal axis of the truck and sup porting the truck, and an elongate forwardly projecting manually engageable tiller, a motor with a variable speed transmission carried by the bed and drive means between the transmission and drive wheels, a flat, normally vertically disposed pad arranged between the legs with its lower portion against the front end of the bed and its upper corners pivotally mounted to the legs, a second motor mounted on the pad to project forwardly therefrom and having a downwardly projecting output shaft, and an elongate normally vertically disposed cutting tool carried by the output shaft and normally projecting into the surface over which the machine is operated, said drive means including a drive sprocket on the transmission output shaft, a driven pulley on one of the wheels and a chain engaged about and extending between the sprockets.

13. A vehicular routing machine of the character referred to including, an elongate frame with front and rear ends, a platform at the rear end of the frame, a pair of laterally spaced support wheelsrotatably carried by and supporting the platform, a downwardly opening bearing housing at the front end of the frame, a truck arranged below the front end of the frame and having a flat horizontally disposed bed with front and rear ends, a fork having laterally spaced legs and a horizontal header fixed to and projecting upwardly from the front end of the bed, a vertically disposed spindle fixed to and projecting upwardly from the header and into the housing, a pair of laterally spaced drive wheels rotatably carried by the bed on axes intersecting the pivotal axis of the truck and supporting the truck, and an elongate forwardly projecting manually engageable tiller, a motor with a variable speed transmission carried by the bed and drive means between the transmission and drive wheels, a flat, normally vertically disposed pad arranged between the legs with its lower portion against the front end of the bed and its upper corners pivotally mounted to the legs, a second motor mounted on the pad to project forwardly therefrom and having a downwardly projecting output shaft, and an elongate normally vertically disposed cutting tool carried by the output shaft and normally projecting into the surface over which the machine is operated, said drive means including a drive sprocket on the transmission output shaft, a countershaft extending transverse the bed, a driven sprocket on the countershaft, a chain engaged about and extending between the said sprockets, a drive sprocket at each end of the countershaft, a driven sprocket on each wheel and a chain engaged about and extending between the related drive and driven sprockets on the countershaft and wheels.

14. A vehicular routing machine of the character referred to including, an elongate frame with front and rear ends, a platform at the rear end of the frame, a pair of laterally spaced support wheels rotata-bly carried by and supporting the platform, a downwardly opening bearing housing at the front end of the frame, a truck arranged below the front end of the frame and having a flat horizontally disposed bed with front and rear ends, a fork having laterally spaced legs and a horizontal header fixed to and projecting upwardly from the front end of the bed, a vertically disposed spindle fixed to and projecting upwardly from the header and into the housing, a pair of laterally spaced drive wheels rotatably carried by the bed on axes intersecting the pivotal axis of the truck and supporting the truck, and an elongate forwardly projecting manually engageable tiller, a motor with a variablespeed transmission carried by the bed and drive means between the transmission and drive wheels, a fiat, normally vertically disposed pad arranged between the legs with its lower portion against the front end of the bed and its upper corners pivotally mounted to the legs, a second motor mounted on the pad to project forwardly therefrom and having a downwardly projecting output shaft, and an elongate normally vertically disposed cutting tool carried by the output shaft and normally projecting into the surface over which the machine is operated, the rotative axis of the tool occurring on the central vertical plane of the truck and intersecting the axes of the wheels.

7 15. A vehicular routing machine of the character referred to including, an elongate frame with front and rear ends, a platform at the rear end of the frame, a pair of laterally spaced support wheels rotatably carried by and supporting the platform, a downwardly opening bearing housing at the front end of the frame, a truck arranged below the' front end of the frame and having a flat horizontally disposed bed with front and rear ends, a fork having laterally spaced legs and a horizontal header fixed to and projecting upwardly from the front end of the bed, a vertically disposed spindle fixed to and projecting upwardly from the header and into the housing, a pair of laterally spaced drive wheels rotatably carried by the bed on axes-intersecting the pivotal axis of the truck and supporting the truck, and an elongate forwardly projecting manually engageable tiller, a motor with a variable speed transmission carried by the bed and drive means between the transmission and drive wheels, a flat, normally vertically disposed pad arranged between the legs with its lower portion against the front end of the bed and its upper corners pivotally mounted to the legs, a second motor mounted on the pad to project forwardly therefrom and having a downwardly projecting output shaft, and an elongate normally vertically disposed cutting tool carried by the output shaft and normally projecting into the surface over which the machine is operated, and a generator unit mounted on the platform and supplying current to the motors.

References Cited in the file of this patent UNITED STATES PATENTS 2,560,352 Kelsey July 10, 1961 2,984,471 Jackson May 16, 1961

Claims

2. A VEHICULAR ROUTING MACHINE OF THE CHARACTER REFERRED TO INCLUDING AN ELONGATED FRAME WITH FRONT AND REAR ENDS, A PAIR OF LATERALLY SPACED SUPORT WHEELS AT THE REAR END OF THE FRAME, A TRUCK PIVOTALLY CONNECTED WITH THE FRONT END OF THE FRAME ON A VERTICAL AXIS AND HAVING A PAIR OF LATERALLY SPACED DRIVE WHEELS ON AN AXIS INTERSECTING THE PIVOTAL AXIS OF THE TRUCK, A MOTOR CARRIED BY THE TRUCK AND DRIVING THE DRIVE WHEELS, A SECOND MOTOR CARRIED BY THE TRUCK ON A PLANE INTERMEDIATE THE DRIVE WHEELS AND HAVING A DOWNWARDLY PROJECTING VERTICALLY DISPOSED OUTPUT SHAFT INTERSECTING THE AXES OF THE DRIVE WHEELS, AN ELONGATE VERTICALLY DISPOSED CUTTING TOOL CARRIED BY THE OUTPUT SHAFT TO DEPEND THEREFROM AND INTO THE SURFACE ON WHICH THE MACHINE IS SUPPORTED, AND AN ELONGATE TILLER FIXED TO AND PROJECTING FORWARDLY FROM THE TRUCK.