US3387891A - Pavement cutting machine with telescoping frame - Google Patents

Pavement cutting machine with telescoping frame Download PDF

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US3387891A
US3387891A US589046A US58904666A US3387891A US 3387891 A US3387891 A US 3387891A US 589046 A US589046 A US 589046A US 58904666 A US58904666 A US 58904666A US 3387891 A US3387891 A US 3387891A
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frame
pavement
machine
rotary cutting
cutting
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US589046A
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Glen E Simms
David E Cook
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CONCUT Inc
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CONCUT Inc
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
    • E01C23/0906—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating cuts, grooves, recesses or, excluding forming, cracks, e.g. cleaning by sand-blasting or air-jet ; for trimming paving edges
    • E01C23/0926—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating cuts, grooves, recesses or, excluding forming, cracks, e.g. cleaning by sand-blasting or air-jet ; for trimming paving edges with power-driven tools, e.g. vibrated, percussive cutters
    • E01C23/0933—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating cuts, grooves, recesses or, excluding forming, cracks, e.g. cleaning by sand-blasting or air-jet ; for trimming paving edges with power-driven tools, e.g. vibrated, percussive cutters rotary, e.g. circular-saw joint cutters

Definitions

  • the present invention relates in general to a machine which is particularly suitable for performing various cutting operations on pavement, and especially concrete pavement.
  • the machine of the invention is capable of leveling concrete pavement to eliminate lumps therefrom, grooving concrete pavement to increase its skid resistance, sawing expansion joints in concrete pavement, and the like.
  • the invention relates to a selfpropelled, vehicle-type pavement cutting machine of the general character disclosed in Patents Nos. 3,195,957, issued July 20, 1965, Re. 25,838, reissued Aug. 10, 1965, 3,201,173, issued Aug. 17, 1965, 3,208,796, issued Sept. 28, 1965, and 3,272,560, issued Sept. 13, 1966, all to Cecil W. Hatcher.
  • the invention contemplates a selfpropelled, vehicle-type, pavement cutting machine which includes: frame means having longitudinally spaced front and rear ends; front wheel means connected to and supporting the front end of the frame means; rear wheel means connected to and supporting the rear end of the frame means; rotary cutting means carried by the frame means between the front and rear wheel means, and rotatable about a transverse axis, for cutting pavement over which the machine runs; and means on the frame means and connected to the rotary cutting means and at least one of the wheel means for driving the rotary cutting means and for propelling the machine.
  • a primary object of the invention is to provide a pavement cutting machine of the foregoing type having means for varying the longitudinal spacing of the front and rear wheel means and, more particularly, having means for varying the longitudinal spacing of the front wheel means and the rotary cutting means.
  • a related object is to provide a machine wherein the front wheel means and the rotary cutting means are juxtaposed in close proximity to each other when the longitudinal spacing between the front and rear wheel means is at its minimum.
  • the front wheel means When the longitudinal spacing between the front and rear wheel means is at its maximum, the front wheel means is located a substantial distance forwardly of the rotary cutting means. Under such conditions, the machine can be used to level concrete pavement by cutting bumps therefrom, the forward position of the front wheel means minimizing reflections of bumps encountered thereby to the rotary cutting means. When the longitudinal spacing of the front and rear wheel means is at its minimum, the machine can be used for pavement grooving or sawing operations, the location of the front wheel means in close proximity to the rotary cutting means under such conditions resulting in grooving or sawing to constant depths.
  • an important object thereof is to provide a pavement cutting machine including frame means having front and rear sections to which the front and rear wheel means are connected, respectively, and which are telescopically interconected to vary the longitudinal spacing of the front and rear wheel means.
  • the frame means may be extended to make the machine a bump cutter, or the frame means may be contracted to make the machine a constant-depth grooving or sawing machine, or for transport purposes.
  • Still another object is to provide a machine wherein "ice the frame means includes a main frame composed of the telescopically interconnected front and rear sections mentioned, and also includes an auxiliary frame having a rear end connected to the rear section of the main frame for pivotal movement of the auxiliary frame relative to the rear section of the main frame about a transverse auxiliary-frame pivot axis, the machine further including actuating means interconnecting the front end of the auxiliary frame and the rear section of the main frame for pivoting the auxiliary frame upwardly and downwardly about the auxiliary-frame pivot axis.
  • An important object in the foregoing connection is to mount the rotary cutting means on the auxiliary frame adjacent the front end thereof so that upward and downward pivoting of the auxiliary frame results in varying the depth of cut, or in lifting the rotary cutting means out of engagement with the pavement.
  • Another object is to provide a machine wherein the means for driving the rotary cutting means and for propelling the machine includes an engine mounted on the auxiliary frame so that its weight is available to force the rotary cutting means into the pavement as it rotates.
  • Yet another object is to provide retractable pavement engaging means carried by the auxiliary frame adjacent the front end thereof and extensible into engagement with the pavement to prevent downward pivotal movement of the auxiliary frame by the actuating means, thereby causing the actuating means to lift the front wheel means off the pavement to facilitate telescopic extension and contraction of the main frame when varying the longitudinal spacing of the front and rear wheel means between its minimum and its maximum. 4
  • a further object of the invention is to provide interengageable stop means on the auxiliary frame and the rear section of the main frame for limiting downward pivotal movement of the auxiliary frame to control the depth of cut, one of the stop means comprising a stack of pivoted leaves selectively pivotable into and out of a position to be engaged by the other of the stop means so as to vary the depth of cut.
  • An additional object is to provide a rear wheel means which is pivotable relative to the frame means about a vertical axis and which has steering means connected thereto for pivoting same about such axis to steer the machine.
  • FIG. 1 is a plan view of a pavement cutting machine which embodies the invention
  • FIG. 2 is a side elevational view of the machine in its extended condition and in condition to level pavement;
  • FIG. 3 is a side elevational view of the machine in its contracted condition and in condition for transport;
  • FIGS. 4 and 5 are sectional views respectively taken along the arrowed lines 44 and 55 of FIG. 1, FIG. 5 being a fragmentary view on an enlarged scale;
  • FIG. 6 is a sectional view taken as indicated by the arrowed line 6-6 of FIG. 5;
  • FIG. 7 is a fragmentary side elevational view showing a main frame of the machine in the process of being extended.
  • FIG. 8 is an enlarged, fragmentary sectional view taken as indicated by the arrowed line 88 of FIG. 4 of the drawings.
  • the pavement cutting machine of the invention is designated generally by the numeral 10 and includes a frame means comprising a main frame 12 and an auxiliary frame 14.
  • the main frame 12 comprises telescopically interconnected front and rear sections 16 and 18.
  • the front section 16 of the main frame 12 includes laterally spaced, longitudinal tubes 26 the front ends of which are interconnected by a cross member 22 and the rear ends of which are telescoped into laterally spaced, longitudinal tubes 24 forming parts of the rear section 18.
  • the front and rear ends of the tubes 24 are interconnected by front and rear cross members 26 and 28.
  • FIGS. 1, 2 and 4 show the main frame 12 in its extended condition, while FIGS. 3 and 7 show it in its contracted condition.
  • the main frame 12 may be secured in its extended or contracted conditions by bolts 30 extending through the front ends of the tubes 24 of the rear frame section 18 and through corresponding portions of the tubes 29 of the front frame section 16.
  • the frame means comprising the telescoping main frame 12 and the auxiliary frame 14 is supported by a front wheel means 32 and a rear wheel means 34 respectively connected to the frame means adjacent the front and rear ends thereof.
  • the front wheel means 32 preferably comprises two laterally spaced, front wheels 36, which may be suitably mounted on the cross member 22 of the front frame section 16.
  • the rear wheel means 34 preferably comprises a single rear wheel 38 which, as best shown in FIG. 8, is rotatably mounted in a yoke 40 having a vertical spindle 42 journaled in a bearing 44 carried by the rear cross member 28 of the rear frame section 18.
  • a vertical steering shaft 46 suitably mounted on the rear cross member 28 is connected to the rearwheel spindle 42 by a chain 48.
  • the steering shaft 46 is provided with a rearwardly-extending steering handle 50 actuable by an operator walking behind the machine 10. It will be understood that, if desired, a platform or seat, not shown, on which the operator may stand or sit may be added to the rear end of the rear section 18 of the main frame 12.
  • the auxiliary frame 14 is located below the rear section 18 of the main frame 12 and between the longitudinal tubes 24 of the main frame.
  • Such upward and downward pivoting of the auxiliary frame 14 may be effected by a hydraulic cylinder, i.e., a hydraulic motor of the reciprocating type, 54 pivotally connected at one end to the front of the auxiliary frame and pivotally connected at its other end to the upper end of a post 56 on the front cross member 26 of the rear frame section 18.
  • the hydraulic cylinder 54 may be actuated to raise and lower the auxiliary frame 14 between the operative and inoperative positions respectively shown in FIGS. 2 and 3 of the drawings.
  • auxiliary frame 14 Mounted on the auxiliary frame 14 adjacent the pivoted rear end thereof is an engine 58 which drives a suitable hydraulic pump, not shown.
  • the output of this hydraulic pump is used to actuate the hydraulic cylinder 54 to raise and lower the front end of the auxiliary frame 14.
  • the output of the hydraulic pump is also utilized to actuate a rotary hydraulic motor 60 suitably mounted on a frame 62 attached to the rear-wheel yoke 40.
  • the rotary hydraulic motor 60 is connected to the rear wheel 38 by a chain 64 to permit the motor 60 to propel the machine 10, this motor being reversible so that it can propel the machine either forwardly or rearwardly.
  • a rotary cutting means 68 Carried by the auxiliary frame 14 adjacent the front end thereof is a rotary cutting means 68 mounted on the 4 auxiliary frame in suitable bearings 70 for rotation about a transverse axis.
  • the rotary cutting means 68 is driven by the engine 58 through belts 72.
  • the rotary cutting means 68 is shown as comprising a plurality of laterally spaced circular saw blades 74, FIG. 1, in the particular construction illustrated. With this construction, the rotary cutting means 68 may be utilized either for bump cutting, or for grooving. Alternatively, therotary cutting means 68 may comprise a single saw blade 74 for sawing expansion joints.
  • the front wheel means 32 when the main frame 12 is in its extended condition, the front wheel means 32 is located a substantial distance forwardly of the rotary cutting means 68. With this configuration for the machine 10, it may be utilized for bump cutting, the forward location of the front wheel means 32 minimizing the reflection of bumps encountered thereby to the rotary cutting means 68 so as to provide for leveling of the pavement with maximum effectiveness.
  • the front wheelmeans 32 and the rotary cutting means 68 are juxtaposed in close proximity to each other, as shown in FIGS. 3 and 7.
  • the rotary cutting means 68 may be utilized for cutting grooves of constant depth, or for sawing a single slot of constant depth in the event that only one saw blade 74 is used.
  • the front wheel means 32 close to the rotary cutting means 68, as shown in FIGS. 3 and 7, the front wheel means causes the rotary cutting means 68 to follow irregularities in the pavement so as to cut a groove or grooves of substantially constant depth, with little or no leveling of the pavement.
  • the depth of cut of the rotary cutting means 68 is adjustably regulated by interengageable stop means .76
  • the stop means 76 comprises laterally spaced stop screws 80 threaded through upstanding arms 82 on the front end of the auxiliary frame 14.
  • the stop means 78 on the rear frame section 18 comprises laterally spaced stacks of pivoted leaves 84 selectively pivotable into and out of a position to be engaged by the respective stop screws 80.
  • depth of cut of the rotary cutting means 68 may be varied.
  • pavement-engaging elements 88 which are pivotable downwardly from retracted positions into pavement engaging positions, the latter positions being shownin FIG. 7.
  • pavement engaging elements 88 may.
  • FIG. 7. This takes. the weight off the front wheel means 32 so that the front frame section 16 can readily be extended or contracted relative to the rear frame section 18, which is an important feature.
  • a pavement cutting machine according to claim 1 wherein said front wheel means and said rotary cutting means are juxtaposed when the longitudinal spacing between said front and rear wheel means is at its minimum.
  • said frame means having front and rear sections to which said front and rear wheel means are connected, respectively, and which are telescopically interconnected to vary the longitudinal spacing of said front and rear wheel means.
  • a pavement cutting machine wherein said telescopically interconnected front and rear sections of said frame means constitute a main frame of the frame means, and wherein said frame means includes an auxiliary frame having a rear end connected to said rear section of said main frame for pivotal movement of said auxiliary frame relative to said rear section of main frame about a transverse auxiliary-frame pivot axis, said engine and said rotary cutting means being mounted on said auxiliary frame, and said pavement cutting machine including actuating means interconnecting the front end of said auxiliary frame and said rear section of said main frame for pivoting said auxiliary frame upward and downwardly about said auxiliary-frame pivot axis.
  • a pavement cutting machine as defined in claim 6 including retractable pavement engaging means carried by said auxiliary frame adjacent the front end thereof, said pavement engaging means being extensible into engagement with the pavement to prevent downward pivotal movement of said auxiliary frame by said actuating means and to thus cause said actuating means to lift said front wheel means off the pavement to facilitate teiescopic extension and contraction of said main frame.
  • a pavement cutting machine as defined in claim 6 including interengageable stop means on said auxiliary frame and said rear section of said main frame for limiting downward pivotal movement of said auxiliary frame, one of said stop means comprising a stack of pivoted leaves selectively pivotable into and out of a position to be engaged by the other of said stop means to vary the depth of cut of said rotary cutting means.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Road Repair (AREA)

Description

June 11, 1968 e. E. smms ETAL PAVEMENT CUTTING MACHINE WITH TELESCOPING FRAME Filed Oct. 24, 1
Q @a m E m a m w A s S M W U lhme 11, 1968 G. E- SIMMS ETAL.
PAVEMENT CUTTING MACHINE WITH TELESCOPING FRAME Filed Oct. 24, 1966 3 Sheets-Sheet 2 I QINI. iaEElL x s O N w 0 Q INVENTORS. GLEN E. Slums X Dawn E.C'oo1 5 Their flzfarn eys x l/nee/s, K1555 Passe. Keen June 11, 1968 s. E. SIMMS ETAL PAVEMENT CUTTING "MACHINE WITH TELESCOPING Filed on. 24, 1965 FRAME 5 Sheets-Sheet 3 61.5w E. SIMMS .Dnwo E. Coax United States Patent 3,387,891 PAVEMENT CUTTING MACHINE WITH TELESCOPING FRAME Glen E. Simms, Glendora, and David E. Cook, El Monte, Califl, assignors to Concut, Inc., El Monte, Calif., a corporation of California Filed Oct. 24, 1966, Ser. No. 589,046 8 Claims. (Cl. 299-39) The present invention relates in general to a machine which is particularly suitable for performing various cutting operations on pavement, and especially concrete pavement. For example, the machine of the invention is capable of leveling concrete pavement to eliminate lumps therefrom, grooving concrete pavement to increase its skid resistance, sawing expansion joints in concrete pavement, and the like.
More particularly, the invention relates to a selfpropelled, vehicle-type pavement cutting machine of the general character disclosed in Patents Nos. 3,195,957, issued July 20, 1965, Re. 25,838, reissued Aug. 10, 1965, 3,201,173, issued Aug. 17, 1965, 3,208,796, issued Sept. 28, 1965, and 3,272,560, issued Sept. 13, 1966, all to Cecil W. Hatcher.
As background, the invention contemplates a selfpropelled, vehicle-type, pavement cutting machine which includes: frame means having longitudinally spaced front and rear ends; front wheel means connected to and supporting the front end of the frame means; rear wheel means connected to and supporting the rear end of the frame means; rotary cutting means carried by the frame means between the front and rear wheel means, and rotatable about a transverse axis, for cutting pavement over which the machine runs; and means on the frame means and connected to the rotary cutting means and at least one of the wheel means for driving the rotary cutting means and for propelling the machine.
A primary object of the invention is to provide a pavement cutting machine of the foregoing type having means for varying the longitudinal spacing of the front and rear wheel means and, more particularly, having means for varying the longitudinal spacing of the front wheel means and the rotary cutting means. A related object is to provide a machine wherein the front wheel means and the rotary cutting means are juxtaposed in close proximity to each other when the longitudinal spacing between the front and rear wheel means is at its minimum.
When the longitudinal spacing between the front and rear wheel means is at its maximum, the front wheel means is located a substantial distance forwardly of the rotary cutting means. Under such conditions, the machine can be used to level concrete pavement by cutting bumps therefrom, the forward position of the front wheel means minimizing reflections of bumps encountered thereby to the rotary cutting means. When the longitudinal spacing of the front and rear wheel means is at its minimum, the machine can be used for pavement grooving or sawing operations, the location of the front wheel means in close proximity to the rotary cutting means under such conditions resulting in grooving or sawing to constant depths.
Considering the invention somewhat more specifically, an important object thereof is to provide a pavement cutting machine including frame means having front and rear sections to which the front and rear wheel means are connected, respectively, and which are telescopically interconected to vary the longitudinal spacing of the front and rear wheel means. With this construction, the frame means may be extended to make the machine a bump cutter, or the frame means may be contracted to make the machine a constant-depth grooving or sawing machine, or for transport purposes.
Still another object is to provide a machine wherein "ice the frame means includes a main frame composed of the telescopically interconnected front and rear sections mentioned, and also includes an auxiliary frame having a rear end connected to the rear section of the main frame for pivotal movement of the auxiliary frame relative to the rear section of the main frame about a transverse auxiliary-frame pivot axis, the machine further including actuating means interconnecting the front end of the auxiliary frame and the rear section of the main frame for pivoting the auxiliary frame upwardly and downwardly about the auxiliary-frame pivot axis.
An important object in the foregoing connection is to mount the rotary cutting means on the auxiliary frame adjacent the front end thereof so that upward and downward pivoting of the auxiliary frame results in varying the depth of cut, or in lifting the rotary cutting means out of engagement with the pavement.
Another object is to provide a machine wherein the means for driving the rotary cutting means and for propelling the machine includes an engine mounted on the auxiliary frame so that its weight is available to force the rotary cutting means into the pavement as it rotates.
Yet another object is to provide retractable pavement engaging means carried by the auxiliary frame adjacent the front end thereof and extensible into engagement with the pavement to prevent downward pivotal movement of the auxiliary frame by the actuating means, thereby causing the actuating means to lift the front wheel means off the pavement to facilitate telescopic extension and contraction of the main frame when varying the longitudinal spacing of the front and rear wheel means between its minimum and its maximum. 4
A further object of the invention is to provide interengageable stop means on the auxiliary frame and the rear section of the main frame for limiting downward pivotal movement of the auxiliary frame to control the depth of cut, one of the stop means comprising a stack of pivoted leaves selectively pivotable into and out of a position to be engaged by the other of the stop means so as to vary the depth of cut.
An additional object is to provide a rear wheel means which is pivotable relative to the frame means about a vertical axis and which has steering means connected thereto for pivoting same about such axis to steer the machine.
The fore-going objects, advantages, features and results of the present invention, together with various other objects, advantages, features and results thereof which will be evident to those skilled in the pavement cutting art in the light of this disclosure, may be achieved with the exemplary embodiment of the invention described in detail hereinafter and illustrated in the accompanying drawings, in which:
FIG. 1 is a plan view of a pavement cutting machine which embodies the invention;
FIG. 2 is a side elevational view of the machine in its extended condition and in condition to level pavement;
FIG. 3 is a side elevational view of the machine in its contracted condition and in condition for transport;
FIGS. 4 and 5 are sectional views respectively taken along the arrowed lines 44 and 55 of FIG. 1, FIG. 5 being a fragmentary view on an enlarged scale;
FIG. 6 is a sectional view taken as indicated by the arrowed line 6-6 of FIG. 5;
FIG. 7 is a fragmentary side elevational view showing a main frame of the machine in the process of being extended; and
FIG. 8 is an enlarged, fragmentary sectional view taken as indicated by the arrowed line 88 of FIG. 4 of the drawings.
In the drawings, the pavement cutting machine of the invention is designated generally by the numeral 10 and includes a frame means comprising a main frame 12 and an auxiliary frame 14. The main frame 12 comprises telescopically interconnected front and rear sections 16 and 18. In the construction illustrated, the front section 16 of the main frame 12 includes laterally spaced, longitudinal tubes 26 the front ends of which are interconnected by a cross member 22 and the rear ends of which are telescoped into laterally spaced, longitudinal tubes 24 forming parts of the rear section 18. The front and rear ends of the tubes 24 are interconnected by front and rear cross members 26 and 28. FIGS. 1, 2 and 4 show the main frame 12 in its extended condition, while FIGS. 3 and 7 show it in its contracted condition. The main frame 12 may be secured in its extended or contracted conditions by bolts 30 extending through the front ends of the tubes 24 of the rear frame section 18 and through corresponding portions of the tubes 29 of the front frame section 16.
The frame means comprising the telescoping main frame 12 and the auxiliary frame 14 is supported by a front wheel means 32 and a rear wheel means 34 respectively connected to the frame means adjacent the front and rear ends thereof. As best shown in FIG. 1, the front wheel means 32 preferably comprises two laterally spaced, front wheels 36, which may be suitably mounted on the cross member 22 of the front frame section 16. The rear wheel means 34 preferably comprises a single rear wheel 38 which, as best shown in FIG. 8, is rotatably mounted in a yoke 40 having a vertical spindle 42 journaled in a bearing 44 carried by the rear cross member 28 of the rear frame section 18. As shown in FIGS. 4 and 8, a vertical steering shaft 46 suitably mounted on the rear cross member 28 is connected to the rearwheel spindle 42 by a chain 48. As will be apparent, by pivoting the steering shaft 46 to correspondingly pivot the rear-wheel spindle 42, the rear wheel 38 is pivoted about the axis of the spindle 42 to steer the machine 10. The steering shaft 46 is provided with a rearwardly-extending steering handle 50 actuable by an operator walking behind the machine 10. It will be understood that, if desired, a platform or seat, not shown, on which the operator may stand or sit may be added to the rear end of the rear section 18 of the main frame 12.
The auxiliary frame 14 is located below the rear section 18 of the main frame 12 and between the longitudinal tubes 24 of the main frame. The rearward end of the auxiliary frame 14, which may merely be a suitably-reinforced rectangular plate, is pivotally connected to the rear section 18 of the main frame 12 by a transverse pivot means 52 which permits upward and downward pivotal movement of the front end of the auxiliary frame about a transverse auxiliary-frame pivot axis. Such upward and downward pivoting of the auxiliary frame 14 may be effected by a hydraulic cylinder, i.e., a hydraulic motor of the reciprocating type, 54 pivotally connected at one end to the front of the auxiliary frame and pivotally connected at its other end to the upper end of a post 56 on the front cross member 26 of the rear frame section 18. As will be apparent, the hydraulic cylinder 54 may be actuated to raise and lower the auxiliary frame 14 between the operative and inoperative positions respectively shown in FIGS. 2 and 3 of the drawings.
Mounted on the auxiliary frame 14 adjacent the pivoted rear end thereof is an engine 58 which drives a suitable hydraulic pump, not shown. The output of this hydraulic pump is used to actuate the hydraulic cylinder 54 to raise and lower the front end of the auxiliary frame 14. The output of the hydraulic pump is also utilized to actuate a rotary hydraulic motor 60 suitably mounted on a frame 62 attached to the rear-wheel yoke 40. The rotary hydraulic motor 60 is connected to the rear wheel 38 by a chain 64 to permit the motor 60 to propel the machine 10, this motor being reversible so that it can propel the machine either forwardly or rearwardly.
Carried by the auxiliary frame 14 adjacent the front end thereof is a rotary cutting means 68 mounted on the 4 auxiliary frame in suitable bearings 70 for rotation about a transverse axis. The rotary cutting means 68 is driven by the engine 58 through belts 72. The rotary cutting means 68 is shown as comprising a plurality of laterally spaced circular saw blades 74, FIG. 1, in the particular construction illustrated. With this construction, the rotary cutting means 68 may be utilized either for bump cutting, or for grooving. Alternatively, therotary cutting means 68 may comprise a single saw blade 74 for sawing expansion joints.
As shown in FIG. 2, when the main frame 12 is in its extended condition, the front wheel means 32 is located a substantial distance forwardly of the rotary cutting means 68. With this configuration for the machine 10, it may be utilized for bump cutting, the forward location of the front wheel means 32 minimizing the reflection of bumps encountered thereby to the rotary cutting means 68 so as to provide for leveling of the pavement with maximum effectiveness.
With the main frame 12 in its contracted condition, the front wheelmeans 32 and the rotary cutting means 68 are juxtaposed in close proximity to each other, as shown in FIGS. 3 and 7. Under such conditions, the rotary cutting means 68 may be utilized for cutting grooves of constant depth, or for sawing a single slot of constant depth in the event that only one saw blade 74 is used. With the front wheel means 32 close to the rotary cutting means 68, as shown in FIGS. 3 and 7, the front wheel means causes the rotary cutting means 68 to follow irregularities in the pavement so as to cut a groove or grooves of substantially constant depth, with little or no leveling of the pavement.
The depth of cut of the rotary cutting means 68 is adjustably regulated by interengageable stop means .76
and 78 respectively carried by theauxiliary frame 14 and.
the rear frame section 18. More particularly, the stop means 76 comprises laterally spaced stop screws 80 threaded through upstanding arms 82 on the front end of the auxiliary frame 14. The stop means 78 on the rear frame section 18 comprises laterally spaced stacks of pivoted leaves 84 selectively pivotable into and out of a position to be engaged by the respective stop screws 80. As will be apparent, by varying the number of leaves 84 in positions to be engaged by the stop screws 80, the
depth of cut of the rotary cutting means 68 may be varied.
Mounted on the front end of the auxiliary frame 14 are pavement-engaging elements 88 which are pivotable downwardly from retracted positions into pavement engaging positions, the latter positions being shownin FIG. 7. As
will be apparent, the pavement engaging elements 88 may.
be pivoted downwardly into: their pavement engaging positions by actuating the hydraulic cylinder 54 to elevate the front end of the auxiliary frame 14. If the hydraulic cylinder 54 is extended with the pavement engaging elements 88 in engagement with the pavement, the effect is to lift the front wheel means 32 clear of the pavement, as
shown in FIG. 7. This takes. the weight off the front wheel means 32 so that the front frame section 16 can readily be extended or contracted relative to the rear frame section 18, which is an important feature.
It is thought that the operation of the machine 10 will be clear from the foregoing description so that no further explanation is necessary. Although an exemplary embodiment of the invention has been disclosed herein for purposes of illustration, it will be understood that various changes, modifications and substitutions may be incorporated in such embodiment without departing from the.
spirit of the invention as defined by the claims which follow, wherein we claim:
1. In a pavement cutting machine, the combination of: (a) frame means having longitudinally spaced front and rear ends; (b) front wheel means connected to and supporting said frame means adjacent said front end thereof;
(c) rear wheel means connected to and supporting said frame means adjacent said rear end thereof;
(d) rotary cutting means carried by said frame means between said front and rear wheel means, and rotatable about a transverse axis of rotation, for cutting pavement over which the machine runs;
(e) means connected to said rotary cutting means and at least one of said wheel means for driving said rotary cutting means and for propelling the machine; and
(f) means for varying the longitudinal spacing of said front and rear wheel means.
2. A pavement cutting machine according to claim 1 wherein said front wheel means and said rotary cutting means are juxtaposed when the longitudinal spacing between said front and rear wheel means is at its minimum.
3. A pavement cutting machine as defined in clan. 1 wherein said rear wheel means is ivotable relative to said frame means about a vertical axis and has steering means connected thereto for pivoting san: about said vertical axis.
4-. In a pavement cutting machine, the combination of:
(a) frame means having longitudinally spaced front and rear ends;
(b) front wheel means connected to and supporting said frame means adjacent said front end thereof;
(c) rear wheel means connected to and supporting said frame means adjacent said rear end thereof;
(d) rotary cutting means carried by said frame means between said front and rear Wheel means, and rotatable about a transverse axis of rotation, for cutting pavement over which the machine runs;
(e) an engine carried by said frame means and connected to said rotary cutting means and at least one of said wheel means for driving said rotary cutting means and for propelling the machine; and
(f) said frame means having front and rear sections to which said front and rear wheel means are connected, respectively, and which are telescopically interconnected to vary the longitudinal spacing of said front and rear wheel means.
5. A pavement cutting machine as set forth in claim 4 wherein said rotary cutting means and said engine are carried by said rear section of said frame means.
6. A pavement cutting machine according to claim 5 wherein said telescopically interconnected front and rear sections of said frame means constitute a main frame of the frame means, and wherein said frame means includes an auxiliary frame having a rear end connected to said rear section of said main frame for pivotal movement of said auxiliary frame relative to said rear section of main frame about a transverse auxiliary-frame pivot axis, said engine and said rotary cutting means being mounted on said auxiliary frame, and said pavement cutting machine including actuating means interconnecting the front end of said auxiliary frame and said rear section of said main frame for pivoting said auxiliary frame upward and downwardly about said auxiliary-frame pivot axis.
7. A pavement cutting machine as defined in claim 6 including retractable pavement engaging means carried by said auxiliary frame adjacent the front end thereof, said pavement engaging means being extensible into engagement with the pavement to prevent downward pivotal movement of said auxiliary frame by said actuating means and to thus cause said actuating means to lift said front wheel means off the pavement to facilitate teiescopic extension and contraction of said main frame.
8. A pavement cutting machine as defined in claim 6 including interengageable stop means on said auxiliary frame and said rear section of said main frame for limiting downward pivotal movement of said auxiliary frame, one of said stop means comprising a stack of pivoted leaves selectively pivotable into and out of a position to be engaged by the other of said stop means to vary the depth of cut of said rotary cutting means.
References Cited UNITED STATES PATENTS ERNEST R. PURSER, Primary Examiner.

Claims (1)

1. IN A PAVEMENT CUTTING MACHINE, THE COMBINATION OF: (A) FRAME MEANS HAVING LONGITUDINALLY SPACED FRONT AND REAR ENDS; (B) FRONT WHEEL MEANS CONNECTED TO AND SUPPORTING SAID FRAME MEANS ADJACENT SAID FRONT END THEREOF; (C) REAR WHEEL MEANS CONNECTED TO AND SUPPORTING SAID FRAME MEANS ADJACENT SAID REAR END THEREOF; (D) ROTARY CUTTING MEANS CARRIED BY SAID FRAME MEANS BETWEEN SAID FRONT AND REAR WHEEL MEANS, AND ROTATABLE ABOUT A TRANSVERSE AXIS OF ROTATION, FOR CUTTING PAVEMENT OVER WHICH THE MACHINE RUNS; (E) MEANS CONNECTED TO SAID ROTARY CUTTING MEANS AND AT LEAST ONE OF SAID WHEEL MEANS FOR DRIVING SAID ROTARY CUTTING MEANS AND FOR PROPELLING THE MACHINE; AND (F) MEANS FOR VARYING THE LONGITUDINAL SPACING OF SAID FRONT AND REAR WHEEL MEANS.
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545140A (en) * 1968-09-23 1970-12-08 Hastings Dynamold Corp Slab planer apparatus and method
US3572841A (en) * 1969-01-15 1971-03-30 Norton Co Material pickup for groove cutters
US3663060A (en) * 1970-03-04 1972-05-16 Cushion Cut Inc Wheeled saw
US3815291A (en) * 1972-06-26 1974-06-11 Allstate Tool And Die Inc Sanding machine for bowling alleys
US4256344A (en) * 1978-12-18 1981-03-17 Concrete Safety Equipment, Inc. Concrete surfacing machine
EP0067386A1 (en) * 1981-06-12 1982-12-22 Berthold Wurmbach Milling device
US4516808A (en) * 1982-12-29 1985-05-14 Mu, Inc. Pavement grinding apparatus
US4953523A (en) * 1989-10-16 1990-09-04 Equipment Development Company, Inc. Quick release mechanism for the tool of a concrete/asphalt abrader
US5104195A (en) * 1988-06-06 1992-04-14 Zaccho Bo R Self-propelled apparatus for cutting asphalt and concrete
US5429420A (en) * 1994-01-03 1995-07-04 Norton Company Pavement cutting saw
US6349488B1 (en) 1999-11-12 2002-02-26 Michael J. Mason Technical field
US6981494B1 (en) 2002-04-23 2006-01-03 Andrew Bowman Telescoping guide for a concrete saw
US20080246328A1 (en) * 2003-12-04 2008-10-09 Thomas Mannebach Automotive Machine for Producing Carriageways

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1630422A (en) * 1925-12-28 1927-05-31 Clarence O Gillespie Road-planing device
US2311891A (en) * 1941-04-17 1943-02-23 Tyson Harry Road grooving machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1630422A (en) * 1925-12-28 1927-05-31 Clarence O Gillespie Road-planing device
US2311891A (en) * 1941-04-17 1943-02-23 Tyson Harry Road grooving machine

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545140A (en) * 1968-09-23 1970-12-08 Hastings Dynamold Corp Slab planer apparatus and method
US3572841A (en) * 1969-01-15 1971-03-30 Norton Co Material pickup for groove cutters
US3663060A (en) * 1970-03-04 1972-05-16 Cushion Cut Inc Wheeled saw
US3815291A (en) * 1972-06-26 1974-06-11 Allstate Tool And Die Inc Sanding machine for bowling alleys
US4256344A (en) * 1978-12-18 1981-03-17 Concrete Safety Equipment, Inc. Concrete surfacing machine
EP0067386A1 (en) * 1981-06-12 1982-12-22 Berthold Wurmbach Milling device
US4516808A (en) * 1982-12-29 1985-05-14 Mu, Inc. Pavement grinding apparatus
US5104195A (en) * 1988-06-06 1992-04-14 Zaccho Bo R Self-propelled apparatus for cutting asphalt and concrete
US4953523A (en) * 1989-10-16 1990-09-04 Equipment Development Company, Inc. Quick release mechanism for the tool of a concrete/asphalt abrader
US5429420A (en) * 1994-01-03 1995-07-04 Norton Company Pavement cutting saw
US6349488B1 (en) 1999-11-12 2002-02-26 Michael J. Mason Technical field
US6981494B1 (en) 2002-04-23 2006-01-03 Andrew Bowman Telescoping guide for a concrete saw
US20080246328A1 (en) * 2003-12-04 2008-10-09 Thomas Mannebach Automotive Machine for Producing Carriageways
US7918512B2 (en) * 2003-12-04 2011-04-05 Wirtgen Gmbh Automotive machine for producing carriageways
US20110140505A1 (en) * 2003-12-04 2011-06-16 Wirtgen Gmbh Automotive Machine For Producing Carriageways
US8075063B2 (en) 2003-12-04 2011-12-13 Wirtgen Gmbh Automotive machine for producing carriageways
US8840191B2 (en) 2003-12-04 2014-09-23 Wirtgen Gmbh Automotive machine for producing carriageways
US9068304B2 (en) 2003-12-04 2015-06-30 Wirtgen Gmbh Automotive machine for producing carriageways

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