US2822154A - Grouting machine - Google Patents

Description

Feb. 4, 1958 H. F. ZAGRAY EI'AL 2, 22,

GROUTING MACHINE 6 Sheets-Sheet 1 Filed Dec. 1, 1954 Md. m

0 W M m & A 5w (0 WM av Haw Feb. 4, 1958 H. F. ZAGRAY ETAL 2s32Z,154

GROUTING MACHINE Filed Dec. 1, 1954 I e Sheets-Sheet 2 INVENTORS- HAROLD F. 2464M FLUYD ,M WHCK ATTORNEYS Feb. 4, 1958 H. F. zAeRAY' EIAL 2,322,154

GROUTING MACHINE Filed Dec. 1, 1954 6 Sheets-Sheet 4 l-mnozo, F: zaq'env f FLOYD M 14/90 ATTOHVEYS 6 Sheets-Sheet 5 Feb. 4, 1958 H. F. ZAGRAY ET AL GROUTING MACHINE Filed Dec. 1, 1954 mm 2 m mm w 1 INVENTORS #099020 F. 246 74) 5 rzoyo w. wee/q ATTORNEYS H. F. ZAGRAY ET Filed Dec. 1, 1

6 Sheets-Sheet INVENTOR HARaLD 5 5 W WAG 4 RNEYS 9 either of the mixing tanks United States PatentO GROUTING MACHINE Harold F. Zagray, Canton, and Floyd W. Wack, Louisville, Ohio, assignors to Precision Building System, Inc., Canton, Ohio, a corporation of Ohio The invention relates to grouting machines and more particularly to certain improvements uponthe type of grouting machine shown in the prior Patent No.

2,633,340, dated March 31, 1953, issued upon application of Harold F. Zagray and Floyd W. Wack.

Such grouting machines are especially adapted for use in erecting masonry Walls of building blocks or bricks of the general type disclosed in Stewart Patent No. 2,558,630, dated June 26, 1951 and in prior patents .to Harold F. Zagray No. 2,634,602, dated April '14, 19,53 and No. 2,655,032, dated October 13, 1953.

Building blocks or bricks of this general type have vertical openings therethrough and communicating horizontal and vertical grooves in the top, bottom and end walls thereof, forming mortar passages located entirely within the outlines of the block or brick.

Such building blocks or bricks are laid up dry, in. a wall of considerable height, after which grout is poured into the openings in the uppermost courseof blocks, filling all of the communicating openings and grooves of the blocks with grout, which, upon hardening, "forms a continuous network of mortar entirely within the outline of the blocks.

Grouting machines of the character to which the invention pertains, are used for pouring or forcing grout into this network of communicating passages, and include a pump, and a hose line by means of which the grout may be carried to a considerable height and poured or pumped into the openings in the uppermost course of the wall.

Prior to my invention, grouting machines of this general type were provided with a single mixing tank or reservoir, from which the grout was withdrawn to a pump from which it was discharged through a hose line.

Such machines do not satisfactorily mix and blend the ingredients of the grout, and do not have satisfactory facilities for thoroughly cleaning the grout therefrom, after a grouting operation is completed. Furthermore, they do not have means for operating either the pump or the mixing tank independently of the other.

It is therefore an object of the present invention to provide a grouting machine which overcomes the abovenamed disadvantages and difficulties, and which embodies certain improvements upon grouting machines of this general type.

Another object is to provide a grouting machinehaving a first or initial and a second or final mixing tank, the grout being initially mixed in the first mixing :tank and then discharged into the second mixing tank, which also functions as a reservoir from which the grout is withdrawn to the pump. i

A further object is to provide means for operating or the pump, independently of the others.

A still further object is to provide such a grouting machine, in which the first or initial-mixing tank is mounted for tilting in opposite directions, whereby-the contents thereof, when properly; mixed, pmay vhemdis- .machine .is ;not iinuuse, zin order to 2,822,154 j Patented eb. 4, 1958 .2 charged into the reservoir, -or;final,mixing tank, or may be discharged, .through a grating or ,chute, onto the groundwhen itis desiredto-cleanthe machine'after a grouting, operation is completed.

.Another object of the invention'is to-providea grout- .ingrnachine of thecharaeter referred ;to, in which; the discharge outlet of the-first ortinitial mixing tank .is covered with a screen, and agitating pad:d1es, in said mixing, chamber -,wipe the grout through 'said screen.

A further object is to provide a grouting machine of .this typein which the wipingpaddles in the initial mixing :tank are formed ofrubber, or ,similar flexible material.

A still further object is toprovide such a machine v,with convenient and readily operable facilities ;for,c1eaning out and flushing themixingztanks, pump andhoseline after use of the machine.

Another object ofthe invention is to provide means .for continuously .recirculatinggrout from the pump to the final mixing tank, during short periods when the prevent clogging of theshoserlineq A further object is to provide a water line in the machine, .with hose.-connections.for furnishing water to the init-ial.mixing tankandtto the-pump.

-A still .further objectdsltmprovide.such a grouting machine, permanently mounted upon a truck, whereby thema'chinezisleasilyttransported and'may be readily movedfrom, onezlocation to another, as may-benequired,

during the building of a masonry wall.

The above and other objects, apparent fromthe-drawings and following description, [may :be attained, the above described difficulties overcome and the advantages and results obtained, by the apparatus, construction,arrangements and combinations,.subcombinations and parts ,which comprise the present invention, a preferredembodiment of which, illustrative ofthe bestmode'inwhich applicant has contemplated applying-theprincipl e, being set forth in detail in the following -des cription and illustrated in the accompanying drawings forming a part hereof.

The invention may be describedin general terms, as comprising a portable groutingmaichine, permanently mounted upon a specially constructed truck -bed,;fo r ease in transportation ,and in -moving the'machineto different positions adjacent to a masonry wall under construction. An initial mixing tank is pivotally' mounted upon the truck bed for tilting in one direction to pour mixed grout into a second or final mixing tank,-n1ounted at alow'er position upon the truck bed, or in the opposite direction for pouring any remaining grout through an opening or grating in the truck bed, in order to" clean said initial mixing tank after agrouting operation hasbeen completed'. i

The discharge outlet of the initial mixing tank is covered with a wire mesh screen, and a rotatable agitator is located within said initial mixing tank and provided with paddles of rubber or the likecontacting said screen for wiping the grout .therethrough.

An'inlet opening is formed inthe initial mixing'tank adjacent to the discharge outlet,a grating being; located over said inlet opening'and' atserratedblade is located transversely across the center ofthe inletppening-for cutting or breaking open bags of cement and thelike' to permit the contents thereof to be pouredinto the initial mixing tank. I

Grout is withdrawn from the second or final mixing tank by a pump which discharges the grant througha hose line provided with a nozzle and shut-off valve.

Means is provided for-driving the agitators in themixing tanks, and the pump, from the conventional powertakeon of the truck,- with separate clutches'fon independently connecting either mixing tank or the pump to the power means.

A water line is provided with hose connections for attaching a hose to furnish water to the initial mixing tank, and for connecting a hose to the pump for flushing and cleaning the same after use, and a hose connection is provided on the second or final mixing tank for connecting the return hose line thereto, or, in the event a single hose line is used, for connecting the end thereof to the final mixing tank, so as to continually recirculate grout from the pump to said mixing tank during periods when the machine is being moved from one position to another.

A preferred embodiment of the invention thus set forth in general terms, is illustrated in the accompanying drawings, in which:

Fig. 1 is a rear elevation of a grouting machine embodying the invention, showing the pump which forces the grout through the flexible hose, viewed as on the line 11, Fig. 2, showing the parts in the normal position;

Fig. 2 is a top plan view of the improved grouting machine, showing the parts in the same positions as in Fig. 1;

Fig. 3 is a section taken as on the line 3-3, Fig. 2, showing the front side of the grouting machine in elevation;

Fig. 4 is a transverse sectional view, taken as on the line 44, Fig. 2, showing one end of the grouting machine in elevation, and illustrating the sprocket chain drive;

Fig. 5 is a section taken as on the line 5-5, Fig. 1, showing. the opposite end of the grouting machine in elevation;

Fig. 6 is a transverse sectional view on the line 66, Figs. 1 and 2, showing the initial mixing tank in full lines tilted to position to pour grout into the final mixing tank, and in broken lines tilted to position to empty grout through the grating in the floor of the truck; and

Fig. 7 is a detached perspective view of the rotary agitator shaft and paddles in the initial mixing tank.

Reference is now made to the detail construction and operation of the embodiment of the invention illustrated in the drawings, in which similar numerals refer to similar parts throughout.

The grouting machine to which the invention pertains is preferably permanently mounted upon a motor truck, a portion of the fioor of which is indicated at It). A fixed, final mixing tank 11, of generally cylindrical shape, and an oscillatory, initial mixing tank 12, also of generally cylindrical form, comprise important parts of the grouting machine.

The final mixing tank 11 is mounted partially below the level of the floor 19 of the truck, the lower portion of said tank being located through an opening 13 in the floor, as best shown in Fig. 6.

A drain 14 is located in the bottom of the final mixing tank, below the truck floor It), and is normally closed as by the screw plug 15, whereby any grout remaining in the final mixing tank may be drained onto the ground, and the tank may be flushed and cleaned so that it is in proper condition for use again.

For the purpose of keeping the grout in the final mixing tank in proper condition for use, a continuously rotating agitator is provided therein. This agitator comprises the shaft 16, concentrically journalled longitudinally through the tank 11, and having a plurality of groups of paddles or blades thereon.

1 Each group of paddles or blades comprises a radially disposed arm 17, fixed upon the shaft 16,.and having a plurality of spaced, angularly disposed paddles 18 fixed thereon, throughout its length, and a wiper blade 19 at its outer end, having an arcuate outer edge portion 20 for wiping contact with. the inner walls of the cylindrical tank 11.

Preferably, there areltourlgroups of these paddles and blades, two groups being connected to the middle portion of the shaft 16, diametrically opposite to each other, as indicated at a-a, the other two groups being located one near each end of the shaft, as indicated at bb, each of the latter groups having a radially disposed blade 21 for Wiping the adjacent end wall of the tank.

For the purpose of admitting grout to the final mixing tank, from the initial mixing tank 12, an inlet opening 22 is provided in the upper portion of the final mixing tank, and preferably extends from the top of the tank, as indicated at 23, to a point on the side toward the initial mixing tank, as indicated at 24.

The initial mixing tank 12 is rotatably mounted upon bearings 25, mounted upon the upper ends of uprights 26, which are supported upon the floor 11 Journals 27 are attached to opposite ends of the tank 12, and journalled in the bearings 25, whereby the initial mixing tank may be oscillated from the normal position shown in Figs. 1 to 5, to the positions shown in Fig. 6.

An inlet opening 28 is provided in the initial mixing tank 12, and preferably provided with a series of spaced longitudinally disposed rods or bars forming a grating 29 thereon, with a central, transversely disposed, serrated blade 30 for cutting or tearing open paper sacks of cement or a mixture of cement and aggregate suitable for making grout. The grating 29 is hinged at one side of the opening 28, as shown at 29a.

An agitator, similar to that in the final mixing tank, is located in the initial mixing tank, the shaft 16a thereof having the journal portions 31 at its ends, journalled within the hollow trunnions 27 of the initial tank 12, whereby the agitator may rotate relative to the tank 12.

A plurality of groups of paddles or blades are carried by the shaft 16a, each group comprising a radially disposed arm 17a, fixed upon the shaft 16a, and having a plurality of spaced, angularly disposed paddles 18a fixed thereon, throughout its length, and a wiper blade 19a at its outer end, having an arcuate edge portion 20a, preferably formed of rubber or the like, for wiping contact with the inner walls of the initial mixing tank 12.

There are preferably four groups of these paddles and blades, two groups being connected to the middle portion of the shaft 16a, diametrically opposite to each other, as indicated at a-a', the other two groups being located one near each end of the shaft, as indicated at b--b', each of the latter groups having a radially disposed blade 21a for wiping the adjacent end wall of the initial mixing tank 12.

At a point adjacent to the inlet or charging opening 28, the initial mixing tank is provided with an outlet or discharge opening 32, provided with a wire mesh or screen 33, through which the mixed grout may be poured into the final mixing tank 11, when the initial mixing tank is rotated to the position shown in Fig. 6.

An opening 34 is formed in the truck floor 10, at the opposite side of the initial mixing tank from the final mixing tank 11, and is covered with a grating or grill 35, so that any grout remaining in the initial mixing tank may be poured therethrough, onto the ground, at the end of the days work, by rotating the initial mixing tank to the broken line position shown in Fig. 6.

Referring now more particularly to Figs. 2 and 3, the

1 conventional power take-ofi shaft of the truck is indicated at 36, and for the purpose of providing means for operating the grouting machine, a universal joint 37 connects this power take-off shaft to the main drive shaft 38 of the grouting machine.

This latter shaft is journalled in suitable bearings 39, mounted upon the angle members 40, supported upon the lower flanges of the channel bars 41, which are suspended from the I-beams 42 of the truck body.

, A sprocket wheel 43 is fixed upon the drive shaft 38, and operatively connected, as by the sprocket chain 44, to the relatively large sprocket wheel 45, fixed upon the countershaft 46. The sprocket wheel 47 is fixed upon e. ou te haft. andl smnneci d. ssby. hetspmcke chain 48, to the relatively large sprocketwheel49, upon the adjacent hollow trunnion27 of the initial mixing tank.

The shaft, 16 ofthe agitator infihefinal mixingtank 11 is provided with trunnions 50:at,its ends, ,journalledfin bearings 51 at oppositeends of the, tank. A.relatively largesprocket wheel 52is fixed upon one;ofjthe trunnions 50 andis connected, as.by. the- sprocketchain 5,3, with-a relatively small sprocket wheel 54, upon theshaft 46, whereby the. agitator in the finalmixing tank may be driven from the main drive shaft 38.

Arclutch is provided upon the shaft 50 for operatively connecting the loosesprocket wheel 52, to the shaft. 50. This clutch comprisesthe clutch member 55,.fixed.to .the sprocket wheel 52, and the slidable,,keyedclutchmember 56 for engagement therewith.

A clutch lever 57 is fulcrumedasat 58 upona bracket 59, and operatively connected to the slidingclutch 56in conventional manner, as by the studs 60 uponthe clutch member locatedthroughslots 61 in-the operating lever 57.

In the same manner, a clutch is provided for controlling the agitator in the initial mixing tank, this;clutch comprising the clutch member 62 fixed to the loose'sprocket 49, on the trunnion 31 of the agitator shaft 16a, and the sliding, keyed clutch member 63 adapted to be operated by the lever 64 fulcrumed as at 65 upon the bracket 66 and connected to the clutch member 63, as by the studsv 67 on the clutchmember and the slots,68 in the lever.

A pump, indicated generally at 69, of the same general type as the pump disclosed, in my prior Patent No. 2,663,340, is providedtfor pumping grout from the final mixing chamber 11 through a flexible hose to the masonry wall under construction.

This pump comprises a housing 70, havinganinlet 71 communicating with the bottom of thefinal mixing tank 11, and an outlet 72, provided with a hose coupling 73, to which a flexible hose 74 is connected. A helical or screw rotor (not shown) similar to that disclosed in my prior patent'above referred to, is located within the housing 70, and the shaft 75 of said rotor is extended through the opposite end of the housing, from the outlet 72.

Brackets 76and 77, depending from the final mixing tank 11 and the truck body respectively, support the pump housing 70 parallel to the mixing tanks at one side of the truck body,

A clutch member 78 is rotatably mounted upon the pump'shaft 75, and has a sprocket wheel 79 fixed thereto, and connected, by the chain 80, with the sprocket Wheel81 upon the main drive shaft 38. The clutch member 82 is slidably keyed upon the pump shaft 75, and adapted to be moved into engagement with the rotating clutch member 78 by the lever 83, fulcrumed at 83' upon the truck frame and extending to the opposite side of the machine.

The lever 83 has a yoke 84 thereon, having slots 85 therein which receive the studs 86 on the sliding clutch member 82, and an operating handle 87 is fixed to the lever 83 and extends outwardly on the pump side of the machine, then the pump may be started or stopped, either by an operator standing on the truck adjacent to the initial mixing tank, or by another operator standing on the ground at the pump side of the truck.

The flexible hose 74 may be of any desired length required for the height to which the grout must be pumped, and is provided at its outer end with a nozzle 88, having a cut-off valve 89 thereon, whereby the discharge of grouting material therefrom may be manually controlled.

For the purpose of preventing the grouting material from hardening in the hose 74, when the valve 89 is closed, a return hose line 90 communicates with the hose '74 adjacent to the nozzle 88, and is connected at its other end to the hose coupling 91 which communicateswith the upper portion of the final mixing tank 11.

Ar. T -connection 92isinterposed'inthe hose line 74,

between, thegnozzle. 88,,and the return hose 90,. andis prQvidedPwith-a valve 93, of any suitable type. This valve 93 may be closed during normal operation, when thehshut-otf valve 89is open, but, if the shut-off valve 89 is closed for any considerable lengthoftime, thevalve 93 is open so that grouting material may be continuously pumped from the final mixing tank. 11, through the hose 74 and back through the return hose to, the tankll, whereby the grouting material will remain at proper consistency andthe machine is at all times ready for operation by merely closing the valve 92 and opening the shutoff'valve 89.

Forthe purpose of furnishing water to the machine, a pipe line 94 is located transversely of the truck and provided, at the pump side of the machine, with a threaded nipple 95 to which a hose may be connected, for attachment to a faucet or the like.

At the other side of the machine, the pipe :line 94 is disposed vertically, as shown at 96, and terminates in a downwardlydirected spout 97, for discharging water into the initial mixing tank 12, as through the screened opening 32 thereof. A valve 98 is provided for controlling the dischal fiof water through the spout 97.

A T -connect, on 99 is provided in the upright pipe. 96, and a short length of pipe 100 isattached thereto, the outerend thereof being threaded, as shown at 101, for attaqhing a hose for, flushing and cleaning the final mixing tank, after a days .work.

In order to flush out and clean the pump, afteruse, a pipe 102 connects the Water supply pipe 94into the. interior oftthewpumphousing 70, and is .providedwith a normally closed valve 103, which maybe opened where it is desired to flush the pump.

It should be. understood that, ifdesired, the return hose 9.0 may. be dispensed with. In this case, whenever the nozzle 88 is not in use for a short period of time, it may be detached from the hose 74,v and the end of the hose maybe attached to the coupling 91 upon the final mixing tank, so that grout will be pumped continuously through said hose and returned to the final mixing-tank.

In the operation of the machine, the desired amounts of cement, aggregate and water are charged into the, initialmixing tank, and are thoroughlymixed to the proper consistency therein by the rotating agitator-blades. The initial mixing tank is held in the position shown inv Fig,- 5, bythe operating rod 104, located through the eye 105 on the side of the tank 12, the inner end of the rod .104 contacting the stop 106, pivoted as at 107 upon the bracket 108.

After the grout is mixedto'proper consistency in the initial mixing tank 12, the operator grasps therod104 and oscillates the tank 12 to the position shown in Fig. 6, discharging the grout from the initial mixing tank 12, through the screen 33, into the final mixing tank.

The rubber tipped blades 20a, of the agitator in-the initial mixing tank, wipe the grout through, the screen 3.3, so that the grout is smooth and free fromany hard lumps or oversize particles of aggregate.

The grouting material is continually agitated after; it is charged into the final mixing tank, and is withdrawn therefrom by the pump, and pumped through the hose line 94 to the desired location and height, where it is discharged from the nozzle 88 into the mortar spaces of the masonry wall under construction.

It will be seen that the agitators in each of the mixing tanks, as well as the pump, may be operated independently, by manual operation of the respective clutch levers, and that the pump clutch may be manually operated from either side of the machine.

After the days work is completed, any grout still remaining in the initial mixing tank may be discharged therefrom, through the grating 35 in the truck floor, by tilting said tank to the broken line position shown in Fig. 6.

For this purpose, the rod 104'is removed from the eye 7 105 on the end of the initial mixing tank 12, and inserted into the eye 119, and the pivoted stop 106 is thrownup, out of the path of said rod.

The final mixing tank 11 may be drained of any remaining grout, by removing the clean-out plug 15, and both tanks may be thoroughly flushed and washed by a hose attached to the coupling 101 of the water supply pipe, the valve 111 being of course opened for this purpose.

By opening the valve 103, in the pipe 102, the pump and hose line 74 may be thoroughly flushed and washed, so that all grout is entirely removed from the machine, and it is ready for use whenever desired.

In the foregoing description, certain terms have been used for brevity, clearness and understanding, but no unnecessary limitations are to be implied therefrom beyond the requirements of the prior art, because such words are used for descriptive purposes herein andare intended to be broadly construed.

Moreover, the embodiments of the improved construction illustrated and described herein are by Way of example, and the scope of the present invention is not limited to the exact details of construction.

Having now described the invention or discovery, the construction, the operation, and use of preferred embodiments thereof, and the advantageous new and useful results obtained thereby; the new and useful construction, and reasonable mechanical equivalents thereof obvious to those skilled in the art, are set forth in the appended claims.

We claim:

1. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, agitating means in the initial mixing tank, means pvotally mounting the initial mixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank, means for tilting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, means for tilting the initial mixing tank away from the final mixing tank to discharge the contents thereof, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, a prime mover and means for independently operatively connecting the prime mover to the pump and to each of said agitating means.

2. A grouting machine comprising a final mixing tank, agitating means therein, a hose connection on the final mixing tank, an initial mixing tank, agitating means in the initial mixng tank above the final mxing tank, there being a discharge outlet in the upper portion of the initial mixing tank, means for tilting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, means for tilting the initial mixing tank away from the final mixing tank to discharge the contents thereof, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, means for connecting the end of said flexible hose to said hose connection for recirculating grout from the pump to said final mixing tank, a prime mover and means for independently operatively connecting the prime mover to the pump and to each of said agitating means.

3. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, agitating means in the initial mixing tank, means pivotally mounting the inital mixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank, means for tilting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, means for tilting the initial mixing tank away from the final mixing tank to discharge the contents thereof, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, a prime mover, and means for independently operatively connecting each of said agitating means and said pump to said primemover.

4. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, rotatable agitating means in the initial mxing tank, means pvotally mounting the initial mixing tank above the final mixing tank, there being a discharge outlet in the upper portion ofthe initial mixing tank, a relatively fine mesh screen covering said discharge outlet, said rotatable agitating means including paddles for wiping contact with said screen, means for tilting the initial mixing tank to dis charge the contents thereof through said outlet into the final mixing tank, said paddles wiping grout through said screen when the initial mixing tank is tilted to discharge position, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, and a prime mover operatively connected to the pump and to said agitating means.

5. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, rotatable agitating means in the initial mixing tank, means pivotally mounting the initial mixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank, a relatively fine mesh screen covering said discharge outlet, said rotatable agitating means including flexible paddles for Wiping contact with said screen, means for tiliting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, flexible paddles wiping grout through said screen when the initial mixing tank is tilted to discharge position, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, and a prime mover operatively connected to the pump and to said agitating means.

6. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, agitating means in the initial mixing tank, means pivotally mounting the initial mixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank and an inlet opening adjacent to the discharge opening, means for tilting the initial mixing tank in one direction to discharge the contents thereof through said discharge outlet into the final mixing tank, means for tilting the initial mixing tank in the opposite direction for emptying the contents thereof through said inlet opening, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, a prime mover and means for independently operatively connecting the prime mover to the pump and to each of said agitating means.

7. In combination with a self-propelled truck having a bed and a power take-off, a grouting machine comprising a final mixing tank mounted upon the truck bed, agitating means therein, an initial mixing tank pivotally mounted upon the truck bed above and at one side of the final mixing tank, agitating means in the initial mixing tank, there being a discharge opening in the truck bed at the opposite side of the initial mixing tank from the final mixing tank, the initial mixing tank having a discharge outlet in its upper portion and an inlet opening adjacent to the discharge outlet, means for tilting the initial mixing tank in one direction to discharge the contents thereof through said discharge outlet into the final mixing tank, means for tilting the initial mixing tank in the opposite direction for emptying the contents thereof through the inlet opening in said initial mixing tank and through said discharge opening in the truck bed, a pump .having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pumpoutlet, and means for operatively connects ,sa a tat nsmeansand sa Pump to said. Power take-off.

8. In combination with a self-propelled truck having a bed and a power take-01f, a grouting machine comprising a final mixing tank mounted upon the truck bed, agitating means therein, an initial mixing tank pivotally mounted upon the truck bed above and at one side of the final mixing tank, agitating means in the initial mixing tank, there being a discharge opening in the truck bed at the opposite side of the initial mixing tank from the final mixing tank, the initial mixing tank having a discharge outlet in its upper portion and an inlet opening adjacent to said discharge outlet, a grating hingedly mounted over said inlet opening, a transversely disposed serrated blade across the center of the inlet opening, means for tilting the initial mixing tank in one direction to discharge the contents thereof through said discharge outlet into the final mixing tank, means for tilting the initial mixing tank in the opposite direction for emptying the contents thereof through the inlet opening in said initial mixing tank and through said discharge opening in the truck bed, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, and separate means for independently operatively connecting each of said agitating means and said pump to said power take-off.

9. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, agitating means in the initial mixing tank, means pivotally mounting the initial mixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank, stop means upon the initial mixing tank, a pivoted lug upon the machine for contact with said stop means to prevent tilting movement of said initial mixing tank away from the final tank, means for tilting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, means for tilting the initial mixing tank in the opposite direction for emptying the contents thereof through said discharge outlet when said pivoted lug is moved out of the path of said stop means, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to the pump outlet, a prime mover and means for independently operatively connecting said prime mover to the pump and to each of said agitating means.

10. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, agitating means in the initial mixing tank, means pivotally mounting the initial mixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank, means for tilting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a valve in the pump inlet, means for operating said valve from a point adjacent the initial mixing tank and means for operating said valve from a point adjacent the pump, a flexible hose connected to the pump outlet, at prime mover and means for independently operatively connecting said prime mover to the pump and to each of said agitating means.

11. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, agitating means in the initial mixing tank, means pivotally mounting the initial m-ixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank, a relatively fine mesh screen covering said discharge outlet, there being an inlet opening in the initial mixing tank adjacent to the discharge outlet therein, a grating over said inlet opening, a transversely disposed serrated blade centrally located across said inlet opening, means for tilting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, a pump having an inlet and an outlet, means connecting the final mixing tank to the pump inlet, a flexible hose connected to'the pump outlet, at prime mover and means operatively connecting the prime mover to the pump and to said agitating means.

12. A mixing tank for mixing grout and the like, means pivotally mounting said tank, there being a discharge outlet in the upper portion of the tank, a relatively fine mesh screen covering said discharge outlet, there being a filling opening in said tank adjacent to the discharge outlet, a grating over said filling opening, a transversely disposed serrated blade centrally located upon said grating, a rotary agitating means within the tank, flexible paddles upon said agitating means for wiping contact with said screen, and means for tilting the tank upon its pivot to discharge the contents thereof through said screen, said flexible paddles wiping grout through said screen when the tank is tilted to discharge position.

13. A grouting machine comprising a final mixing tank, agitating means therein, an initial mixing tank, rotatable agitating means in the initial mixing tank, means pivotally mounting the initial mixing tank above the final mixing tank, there being a discharge outlet in the upper portion of the initial mixing tank, a relatively fine mesh screen covering said discharge outlet, said rotatable agitating means including rubber paddles for wiping contact with said screen, means for tilting the initial mixing tank to discharge the contents thereof through said outlet into the final mixing tank, said paddles wiping grout through said screen when the initial mixing tank is tilted to discharge position, a pump having an inlet and an outlet,

means connecting the final mixing tank to the pump inlet,

a flexible hose connected to the pump outlet, and a prime mover operatively connected to the pump and to said agitating means.

References Cited in the file of this patent UNITED STATES PATENTS 523,195 Brown July 7, 1894 1,460,571 Carey July 13, 1923 1,613,846 Pye Jan. 11, 1927 1,828,317 Clapp Oct. 20, 1931 1,907,836 Lauterbar et al. May 9, 1933 2,580,551 Kacena Jan. 1, 1952 2,633,340 Zagray et a1 Mar. 31, 1953

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