US3020812A - Joint filling machine - Google Patents

Description

Feb. 13, 1962 c. P. GROSS JOINT FILLING MACHINE Filed Dec. 17, 1952 4 Sheets-Sheet 1 i QJ f INVENTOR. Charles 6705 Feb. 13, 1962 c. P. GROSS JOINT FILLING MACHINE 4 Sheets-Sheet 2 Filed Dec. 17, 1952 INVENTOR CHARLES P GROSS ATTO'RNEY Feb. 13, 1962 c. P. GROSS 3,020,812

JOINT FILLING MACHINE Filed Dec. 17, 1952 4 Sheets-Sheet 3 INVENTOR CHARLES P. GROSS k I c T 2 z ATTORNEY Feb. 1962 c. P. GROSS 3,020,812

JOINT FILLING MACHINE Filed Dec. 17, 1952 4 Sheets-Sheet 4 FIG. ll

INVENTOR CHARLES P. GROSS ATTORNEY tet 3,020,812 JOINT FILLING MACHINE Charles P. Gross, Brigantine, N.J., assignor to Joint Filling Equipment Company, Brigantine, NJ. Fiied Dec. 17, 1952, Ser. No. 326,471 4 Claims. (Cl. 94-39) This invention relates to concrete and other structures such as roadways, runways, walks, and the like, wherein expansion joints are provided to allow the concrete to expand, and such joints are filled or sealed with material which permits relative expansion and contraction occasioned by temperature changes, but maintains the joints sealed or sur'iiciently tight to exclude water from the joint and consequent weathering action.

Further, the invention relates to a machine for removing the-sealing or other materials from the joints between sections of concrete or the like, and for filling the joint with new material in cold workable condition, leaving the upper surface of the filling material relatively rounded and smooth, but sufiiciently low so that when maximum contraction occurs there will be no upstanding ridge or bulge which might cause the jolting of vehicles passing thereover.

Heretofore the fillings in joints between sections of walks, roadways, airfield runways and the like have been unsatisfactory for various reasons, including failure to fully protect from the weather, deterioration from temperature changes particularly from excessive heat, and creating a ridge or bulge in the roadway.

In the filling of joints of this character the material has been removed from the joints and the joints cleaned either by hand or with crude gouges or excavating mechanisms. This has been unsatisfactory from the viewpoint of expense, amount of time consumed, and durability and efiiciency of the joint. Also, the filler has been in the nature of tar or similar substance, which first had to be heated and then applied in molten condition, thereby creating a fire hazard which sometimes resulted in the workmen being burned, produced obnoxious or objectional odors, and required a substantial lapse of time in order to permit the material to cool before trafiic could be permitted.

It is an object of the invention to provide a relatively simple, inexpensive, machine which includes a power plant, can be self-propelled or can be pulled or propelled in some other desired manner, has a container or hopper for material to be injected into a joint to be filled, as well as joint excavating cleaning and filling mechanism easily accessible from the side of the machine and driven, along with the pump for discharging material in a cold state, from the power plant of the machine, whereby joints may be readily excavated, cleaned and filled in minimum time with material capable of withstanding temperatures of relatively high character corresponding to these produced by jet aircraft.

Another object of the invention is to provide a joint filling machine which can be readily employed for cleaning and filling joints of various sizes and configurations, and in which the elements are readily adjustable, providing greater flexibility of the machine, and all resulting in reduced cost of operation and maintenance.

A further object of the invention is to provide a machine of the character described having a pilot gouger or excavator, a rotary power-driven excavating member providing traction for the machine, a power-driven rotary cleaning brush for cleaning out the joint, and an applicator behind the brush from which cold mastic or filling material may be injected into the joint to a level slightly below the surface with the filling material smooth so that due to its spacing beneath the surface of the joint of locomotion.

it will not produce unevenness or a ridge causing bumping by a vehicle passing thereover, as well as a power plant mounted on the body of the machine for driving the various elements.

Other objects and the nature and advantages of the invention will be apparent from the following description taken in conjunction with the accompanying draw ings, wherein:

FIG. 1 is a perspective illustrating one application of the invention; 7 I

FIG. 2 is a detail perspective of the applicator;

FIG. 3 is a perspective of the bottom of the applicator;

lFIG. 4 a transverse section through the applicator'on line l4 of FIG. 2;

FIG. 5 a detail perspective illustrating the relation of the pilot gouger, the traction providing cutter, the cleaning brushes, and the applicator;

FIG. 6 a perspective of a slightly modified type of applicator;

FIG. 7, a perspective of a further modified form of applicator; I

FIG. 8, a diagrammatic view illustrating a portion of the drive for the wheels of the machine;

FIG. 9, a fragmentary view on an enlarged scale and with parts in section for greater clarity showing the clutch for controlling the drive to the wheels of the machine;

FIG. 10, a fragmentary plan view showing the manner of mounting the wheels and the drive means therefor; and,

FIG. 11, a sectional view on the line 1*111 of FIG. 10 showing the over-running clutch provided in each wheel.

Briefly stated, the invention comprises a vehicle which may be self-propelled or provided with some other means Preferably it is provided with a supporting wheel at each side, and a guiding wheel at the front. A power plant such as, for example, a gasoline engine is mounted upon the forward portion of the body, and this power plant through reduction gearing serves to drive the various elements of the machine, as well as propel the machine itself.

The power plant through a dual speed transmission may be employed to drive a positive displacement pump for forcing the mastic or joint filler through a discharge tube to an applicator which may be wielded manually or disposed along the side of the machine in a definite position. The mastic may be supplied from a hopper and a tube to the positive displacement pump. The hopper is provided with a wall scraping agitator, also driven from the power plant.

The joint treating mechanism is disposed along the side of the machine and includes a practical, adjustable pilot gouge, a rotary excavator and traction member,

and a brush ahead of the applicator. The gouger and rotary excavator are mounted on a vertically adjustable arm so that they may be disposed at the proper height.

A series of chains provide the driving force for the rotary excavator and the brush.

The machine may have handlebars or handgrips at one end of the same such as, for example, atthe rear", adjacent which may be disposed controls for the power plant.

With continued reference to the drawings, the invention comprises a wheeled vehicle having a frame 10, Sup ported for movement over a surface by means ofwheels 11 disposed one on each side of the vehicle, and with a front or caster wheel 12 rotatably supported in a fork 13. The fork is revolvable in the lower end of a rod 14 vertically adjustable in cars 15 detachably fixed to the frame Ill by means of removablepins .16. These removablepins may be received in seats or sockets 14 in the rod I4.

The machine may be provide d with a handle 17 attached to one of its ends as, for example, to the rear end of the frame of the vehicle as shown, and by means of which an operator may control and guide the vehicle. The machine may be provided with a power plant such as, for example, a gasoline engine 18, by means of which the elements of the machine may be driven. The 'power plant may include a gearbox 19 housing a twospeed drive for a shaft 20-, having mounted thereon a sprocket wheel 20' which drives a larger sprocket 21 by means of a chain 22'and' such larger sprocket operates a gear-type or other positive displacement pump 23 for feeding the joint filling mastic material.

Upon theshaft 20 is mounted agrooved pulley 24 which drives a second pulley 26, by means of a V-belt 25. The pulley 26 through suitable gearing connections may operate an agitator (not shown) in a substantiallyconical hopper 27 for maintaining the filling material in condition to be fed through a tube 28 to the pump 23.

Power is supplied to the two-speed transmission from the power plant by means for reduction gearing (not shown) and asprocket wheel 29 mounted on the shaft 30 which drives the chain 31.

The gearbox or transmission 19 controls the gear ratio and thereby the speed of rotation of theshaft 20 under the influence of an operating lever 32 connected by a cable 33 such as a Bowden wire or the like, to a gearshift or control lever 34- on the handle 17. This makes it possible to control the power plan by means of acable 35 connected to control means (not shown) on the handle 17.

Projecting upwardly from the frame 10 and fixed thereto is a post or column 36 provided with openings 37 at suitably spaced intervals. The upper end of the column 36 may be maintained in position by a brace 38 connected to other portions of the frame. An L-shaped bracket 39 is provided and has an enlargement at one end with an opening 40 for receiving the column 36 and permitting vertical adjustment of the bracket relative thereto. The bracket 39 may be secured in fixed relation to the column 36 by means of a pin or set screw 41 passing through a threaded opening in the bracket and into one of the openings 37 for allowing vertical adjustment.

At the lower end of the bracket 39 a shaft 42 is rotatably maintained in a bearing extending through the bracket along the axis substantially parallel to the axis of thewheels 11 and a rotary cutter 43 having cutting teeth 44 is removably maintained on the shaft 42 for rotation therewith for performing a cutting operation and serving to drive the vehicle forward.

The portion of the shaft 42 extending toward the frame is provided with a sprocket 45 fixed to such shaft and connected by means of chain 46 to a sprocket 57 fixed to the shaft 30. It will be evident that shaft 30 is mounted for rotation in suitable bearings 48 and 49.

Anarm 50 extends forwardly from the lower end of the bracket 39, and adjustably receives a post 50' which carries apilot gouge 50" heldin place by a suitable set screw. Thepilot gouge 50 serves to remove excess filling material in the joint to be excavated and filled. A second arm 51 extends rear-wardly from the lower end of bracket 39 and is connected by means of a universal joint 51 to a third arm 52 connected by means of a universal joint 53 to a fourth arm 54 so that there may be a lateral swinging between said arms without relative rotation thereof. A suitable bearing 55 is located on arm 52 intermediate the ends thereof and rotatably supports a shaft 55 which carries removable brushes 56 and 57. The shaft 55' is rotated by means of a chain 58 engaging a sprocket 58 on shaft 55 and another sprocket 58" on shaft 42 whereby the brushes 56 and 57 are rotated in the same direction as 'the rotary cutter 43 as indicated by the arrow.

An extensible strut comprising a cylinder 59 having a pivotal connection 60 to bracket 39 and a-rod 61 telescopically received in the cylinder 59 and having a pivotal connection 62 to cars mounted on arm 52 controls the relative vertical position of the brush with respect to the cutter 43. This extensible strut may include a spring for normally biasing therod 61 toward its operative position or it may include a fluid cylinder for controlling the relative positions of the parts thereof. The pivotal connections 60 and 62 allow limited lateral movement of the arm 52 so that the brush 56 may be angularly offset with respect to the plane of the cutter 43.

In order to dispense the filling material into the joint, an applicator is provided having adischarge nozzle 63 formed in one end of anelbow 64 which has apivotal connection 65 with the fourth arm 54. Thepivotal connection 65 in conjunction with the universal joint 53 allows lateral movement of the applicator to permit the machine to turn a corner.

Thenozzle 63 is maintained at a predetermined depth in the joint by aplate 66 mounted by its leading end on theelbow 64. Theplate 66 is of sufiicient width to span the joint and rest on the upper surfaces of the pavement. An ear or lug 67 is provided on theplate 66 at the trailing end and at one side thereof and to which lug a piston rod 68' is pivotally connected while its cooperatingcylinder 68 is pivotally connected to an L-shaped bracket 69 having an aperture 70 in an enlargement at one end receiving a column 71 supported on the frame. The bracket 69 is adjustable vertically and may be held in fixed adjusted position by a pin or set screw 72 passing through an opening in the bracket and into one of a series of openings 73 in the column 71. It will be apparent that a downward pressure from thecylinder 68, which may be either mechanical or a fluid type, will maintain theplate 66 in intimate contact with the surface of the pavement or structure adjacent the joint being filled and will prevent the filling material from exuding above the surface.

Aflexible tube 74 is connected at one end by means of anipple 75 to theelbow 64 of the nozzle and the other end of the flexible tube 74 i connected to an outlet nipple 76 of a shutoff valve 77 which is in communication with the outlet of the gear pump 23 by a pipe WA A suitable by-pass 78, which may have a pressure relief valve therein, is arranged between the outlet and inlet of the gear pump to prevent damage in the event the shutoff valve is completely closed or some unexpected obstruction occurs.

Referring more particularly to FIGS. 2 to 4 inclusive, it will be observed that theplate 66 is provided with a rib 79 (FIG. 3), extending longitudinally thereof substantially in line with thenozzle 63 which rib is adapted to extend into the groove or crack between the sections of concrete or the like. Thenozzle 63 projects downwardly from theplate 66 approximately the depth of the crack to be filled and its lowermost portion is open and an elongated notch or opening 80 is provided on the rear side of the nozzle, being open at the lower end and extending upwardly to adjacent theplate 66. At the forward side of the nozzle another opening or notch 81, of materially less height than notch 80, is provided to permit observation of the nozzle during the time that filling material is discharged therefrom as well as to permit discharge of filling material. In operation of the nozzle it will be evident that the filling material is forced thereto by means of the pump 23 and the amount of filling material discharged is accurately controlled by the speed of operation of the pump, the rate of movement of the machine along the ground, the shape of the nozzle and the controlling effect of therib 79 andplate 66 whereby the groove or crack may be accurately filled to the desired height, the bypass 78 prevents excessive discharge from the nozzle.

Thenozzle 63 shown in FIG. 3 is somewhat more elongated inthe direction of movement to allow a greater amount of controlled confinement of the filling material so that such material may exude or be discharged from a substantially greater area.

In FIG. 2 awand 83 of a hollow relatively rigid tube is connected to nipple 75 to permit manual operation of thenozzle 63 and theplate 66. Thesupply hose 74 may be high pressure and flexible for permitting the manual operation of thenozzle 63 andplate 66 by means of the hollow wand or handle 83 whereby joints which have been excavated may be filled.

In FIG. 6 a further modification of an applicator nozzle and a controlling rib are shown and may comprise a triangular nozzle tip 3 which may be formed by cutting a tube at an angle to the axis thereof and using a continuation of such tube to provide anelbow 85 having a connection 06 for joining the nozzle to a source of filling material under pressure. Plate $7 may be of generally convex contour on its underside for projecting into a joint or groove for preventing the filling material from overfilling the groove and for maintaining the desired contour of the upper surface on the filling material in the groove.

The modification shown in FIG. 7 includes anozzle 83 projecting downwardly from a concave-convex plate 89 and with anelbow 90 projecting upwardly for providing a connection by means ofthreads 75 to a flexible tube or a tubular wand as above described. The construction of FIG. 7 is particularly useful Where joints of varying sizes are to be filled since the generally continuous convex surface 91 of theplate 89 may engage the edges of the groove or joint regardless of the Width thereof and the filling material will be depressed below the surface of the concrete slab or other structure.

Referring particularly to FIG. 5, the cutter 43 is shown in the operation of removing the objectionable groove filling material from a joint in aconcrete slab 92 and such cutter is rotated in the direction shown by the arrows in FIGS. 1 and to provide an automatic feed for the entire machine while removing the old filling material from the groove or while increasing the size of existing grooves or making new grooves. The brush 56 extends into thegroove 93 while the brush 57 engages the surface of theslabs 92 for removing any surface obstructions therefrom so that theplate 66 may be maintained in contact with such slabs and therib 79 may project into the groove.

The cutter 43, brush 56, andplate 66 are maintained in the groove even though the groove be of irregular shape. The universal connections at 51 and 53 permit suoh adjustments to occur automatically. Further, thenozzle 63 projects into the groove and the joint filling material is discharged therefrom through the bottom end as well as through the trailing opening or notch 80 While therib 79 prevents the filling material from projecting above the surface of the filling material as shown at 94 in FIG. 5.

There is provided a new and useful machine for filling joints or grooves in new construction as well as replacing objectionable joint filling material which extend above the surface of the adjacent slabs in existing structures. The machine may be used for forming additional expan sion joints in existing construction to prevent buckling and the amount of expansion space necessary between adjacent slabs may be predetermined and diiferent sizes of cutters may be used as required. The completed joint avoids the objectionable bump which may be observed on most roadways where heated filling materials are poured into the joint with large portions thereof on the upper surface. The present invention overcomes these objections and provides a satisfactory solution to a long existing problem.

In airplane runways particularly, the high temperature from the jet type power plants produces such excessive heat that the existing types of joint filling material does not resist such heat and remain in place.

Since it is highly desirable that means be provided for positively driving theground engaging wheels 11 to propel the apparatus over the ground, thewheels 11, as best shown in PEG. 10, are rotatably mounted on an axle which in turn is supported bytubular shafts 96 and 97 which may be secured to the chassis 10 of the apparatus by U-bolts or other suitable fastening means 98.

As best shown in FIGS. 10 and 11, theground engaging wheels 11 are each provided with ahub 99 having a plurality ofinternal ratchet teeth 100, each tooth presenting anabutment 101 which abutments are connected by cam surfaces 102. As stated above, thewheels 11 are freely rotatable on theaxle 95, and in order to transmit driving power from such axle to the wheel, there is provided in each end of the axle 95 aslidable pawl 103, the ends of which are beveled in opposite directions as shown at 104,pawl 103 and teeth constituting an over-running clutch.

Mounted upon theaxle 95 for driving the same is apulley 107 engaging a V-belt 10 5 which in turn engages apulley 107 mounted upon thepower shaft 20 extending from the transmission 19.

Thepulley 107 constitutes a clutch for selectively transmitting power to thewheels 11, andpulley 107 comprises aportion 108 fixed to theshaft 20, and acomplementary portion 109 slidably mounted on theshaft 20 for movement toward and from theportion 108.Portions 108 and 109 are provided with complementarytapered surfaces 110 and 111 which serve to engage thebelt 106 to drive the same, this driving engagement being accomplished by movement of theportion 109 toward theportion 110.

In order to moveportion 109 toward and away fromportion 110 there is provided a bell cranklever 112 pivotally mounted at 113 on the chassis 10, one arm 114 of the bell cranklever 112 being provided with a yoke 115, the arms of which engage in agroove 116 in theportion 109 ofpulley 107. Theother arm 117 of hell cranklever 112 connects to acontrol cable 118 which is enclosed in ahousing 119 leading to a control handle 120 mounted on the handle bar 17 in a position convenient to the operator. Actuation of the control handle 120 will serve to move theportion 109 ofpulley 107 toward or fiom theportion 108 to engage or disengage thebelt 106, thereby controlling the transmission of power from the motor 18 to thewheels 11.

As is well known when a vehicle turns a corner, the outer wheel must travel at a higher rate of speed than the inner wheel, and the pawl and ratchet mechanism above described in connection with FIGS. 10 and 11 serves to compensate for this movement of the outer wheel in that engagement of thepawl 103 with one of theabutments 101 ofteeth 100 on the inner wheel will continue to drive this wheel and the action of the operator in turning the apparatus will cause the outer wheel to move at a faster rate and thus cause thebeveled surface 104 of thepawl 103 to engage one of the cam surfaces 102 thereby sliding thepawl 103 throughshaft 95 into the space provided by anopposite tooth 100. This constitutes an over-running clutch action and as long as the speed of rotation of one wheel exceeds the speed of rotation ofaxle 95 the over-running action will continue, but upon movement of the apparatus in a straight line, both of thepawls 108 will engage anabutment 101 and bothwheels 11 will serve to drive the apparatus over the ground.

The above described mechanism represents a relatively simple and inexpensive drive for an apparatus of this type and permits complete control thereof by the operator to start or stop movement of the apparatus over the ground and also permits turning thereof in any desired path of movement.

It will be obvious to those skilled in the art that various changes may be made in the invention, without departing from the spirit and scope thereof, and therefore the invention is not limited by that which is shown in the drawings and described in the specification, but only as indicated in the appended claims.

What is claimed is:

l. A machine for cleaning and filling joints comprising a frame, ground-engaging supporting wheels for movably supporting said frame on a surface, power means on said frame, a vertically adjustable bracket projecting from said frame and having a substantially horizontal bearing, a shaft rotatably mounted in said bearing, a cutter mounted on said shaft, a vertically adjustable pilot gouge mounted on said bracket, arm means projecting rearwardly from said bracket, a nozzle pivotally connected to the rear end of said arm means and projecting downwardly therefrom, a ground-engaging plate extending rearwardly from said nozzle and having a downwardly projecting rib in alignment with said nozzle on the lower side of said plate, a rotatable brush mounted in a bearing of said arm means, means connecting said cutter and said brush to said power source for operating the cutter and brush in a direction to feed the machine forwardly, and means for supplying joint filling material under pressure to said nozzle whereby the machine will excavate the joint to uniform dimensions and fill the same in a manner that substantially all of the filling material will be below the upper portion of the joint.

2. A machine for cleaning and filling joints comprising a frame, ground-engaging supporting wheels for movably supporting said frame on a surface, power means on said frame, a vertically adjustable bracket projecting from said frame and having a substantially horizontal bearing, a shaft rotatably mounted in said bearing, a cutter mounted on said shaft, arm means projecting rearwardly from said bracket, a nozzle pivotally connected to the rear end of said arm means and projecting downwardly therefrom, a ground-engaging plate extending rearwardly from said nozzle and having a downwardly projecting rib in alignment with said nozzle on the lower side of said plate, a rotatable brush mounted in a bearing of said arm means, means connecting said cutter and said brush to said power source for operating the cutter and brush in a direction to feed the machine forwardly, and means for supplying joint filling material under pressure to said nozzle whereby the machine will excavate the joint to uniform dimensions and fill the same in a manner that substantially all of the filling material will be below the upper portion of the joint.

3. An attachment for a wheeled vehicle comprising a first bracket for adjustable connection to the vehicle and having a hearing at its free end extending transversely to the direction of movement of the vehicle, a rotatable cutter mounted in said bearing for angagement with a supporting surface for excavating a groove therein, an arm extending rearwardly from said bracket and having a bearing thereon, a rotating brush mounted in said bearing of said arm, a nozzle connected to said arm and having a discharge portion opening downwardly and rearwardly and closed at the front and sides, said nozzle projecting downwardly for penetration into an excavated and cleaned groove for filling the same, means connecting said brush and cutter to a source of power on said behicle, and means for supplying filling material from said vehicle to said nozzle.

4. Means for filling a joint comprising a plate having a rib projecting from one side thereof, a nozzle projecting from the same side of the plate and in substantial alignment with said rib, said nozzle having a discharge portion opening downwardly and rearwardly in the direction of said rib and closed at the front and sides, the said nozzle being of a width to extend into a joint to be filled and accommodating the plastic material under pressure whereby the said nozzle and plate may be moved together for filling a joint and said rib serving to limit the height of the filling material in the joint.

References Cited in the file of this patent UNITED STATES PATENTS 1,683,292 Heltzel Sept. 4, 1928 1,916,887 McClain July 4, 1933 1,946,972 Heltzel Feb. 13, 1934 2,354,586 Fischer July 25, 1944 2,569,682 Lewis Oct. 2, 1951 2,578,080 Middlestadt Dec. 11, 1951 2,636,425 I-Ieltzel Apr. 28, 1953 2,673,725 Coates Mar. 30, 1954 2,701,134 Klicpera Feb. 1, 1955

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