US3297180A - Refuse bodies - Google Patents

Description

Jan. 10,1967 G. s. PARK ETVAL 3,297,180

REFUSE BODIES Filed Feb. 23, 1965 4 Sheets-Sheet l INVENTORS GLENN S.PARK RAYMOND R. SZAJ ATTORNEYS Jall- 7 G. s. PARK ETAL 3,297,180

REFUSE BODIES Filed Feb. 25, 1965 4 Sheets-Sheet 2 \NVENTORS GLENN S. PARK RAYMOND R. SZAJ ATTORNEYS Jan. 10, 1967 G. s. PARK ETAL REFUSE BODIES 4 Sheets-Sheet 3 Filed Feb. 23, 1965 INVENTORS GLENN S. PARK RAYMOND R.SZAJ

ATTORNEYS Jan. 10, 1967 s. PARK ETAL 3,297,180

REFUSE BODIES Filed Feb. 23, 1965 4 Sheets-Sheet 4 w MMN Q Q INVENTORS ATTORNEYS GLENN S. PARK RAYMOND R. SZA'J BY W United States Patent 3,297,180 REFUSE BODIES Glenn S. Park, New Berlin, and Raymond R. Szaj, Hales Corners, Wis., assignors to The Heil Co., Milwaukee, Wis., a corporation of Wisconsin Filed Feb. 23, 1965, Ser. No. 434,448 16 Claims. (Cl. 214-833) This invention relates to improvements in refuse bodies.

Heretofore, refuse bodies have been proposed wherein the refuse is dumped directly into the lower end of the tailgate and wherein a scraper-packer member moves the refuse directly from the bottom of the tailgate upwardly and forwardly into the body and simultaneously exerts a packing action. In this type of construction the scraper-packer plate makes its return movement in an elevated postion so that material can be dumped substantially continuously into the tailgate without waiting for a cycle of the packer plate to be completed.

Heretofore, constructions of this type have included hydraulic actuating members and arms which are disposed within the tailgate. This is objectionable as they operate in the refuse. Another problem with prior constructions of this general type is that when the packer-scraper plate moves downwardly toward a position to start scraping refuse from the bottom of the tailgate into the body, if an obstruction is encountered in the form of an unduly bulky and rigid member, there is a tremendous strain placed on the tailgate, packer plate, hopper, and associated mechanism. While a conventional relief valve might be devised to stop the operation in the event of encountering an obstruction, such stopping is undesirable as it interrupts the operation and requires manual restarting of the cycle.

It is a general object of the present invention to provide an improved refuse body of the type wherein refuse is delivered directly from the bottom of the tailgate into the body by a scraper-packer plate and wherein all of the operating mechanism for the scraper-packer plate is external and, therefore, out of the refuse.

A further object of the invention is to provide an improved refuse body construction as above described wherein there is novel means to provide for stopping the downward movement of the booms whenever an unusual obstruction is encountered, to thereby provide a sufi'icient gap between the lower edge of the scraper-packer plate and the bottom of the tailgate to relieve the condition, and thus permit the swinging operation of the scraper plate to occur and continue without loss of time and without breakage or distortion of parts.

A further object of the invention is to provide an improved refuse body wherein the parts are so arranged that the forward part of the tailgate serves to increase the effective size of the body.

A further object of the invention is to provide a refuse body as above described which permits substantially continuous dumping of refuse into the tailgate, and which provides for rapid and effective compression and packing.

With the above and other objects in view, the invention consists of the improved refuse body, and all of its parts and combinations, as set forth in the claims, and all equivalents thereof.

In the accompanying drawings, illustrating one complete embodiment of the preferred form of the invention, in which the same reference numerals designate the same parts in all of the views:

FIG. 1 is a fragmentary perspective view showing the rear end of the improved refuse body with the scraperpacker plate about to start a scraping operation;

FIG. 2 is a partially diagrammatically side elevational view of the tail gate showing the scraper-packer plate in "ice packing position just prior to the start of a new cycle of movement;

FIG. 3 is a view similar to FIG. 2 showing the position of the parts after the scraper-packer plate has started its rearward return movement;

FIG. 4 is a similar view showing a progressively advanced position of the parts wherein the scraper-packer plate is about ready to start its downward travel;

FIG. 5 is a similar view showing the scraper-packer plate about ready to start a scraping movement;

FIG. 6 is a further advanced position showing in position a the scraping movement partially completed and in position b the scraping movement completed;

FIG. 7 is a fragmentary side elevational view showing the upper end of one of the booms;

FIG. 8 is a top view of the structure of FIG. 7, parts being broken away;

FIG. 9 is a rear edge view of the boom of FIG. 7, parts being broken away and shown in section;

FIG. 10 is a diagram showing the electrical and hydraulic circuits.

Referring more particularly to the drawings, the numeral 20 designates a refuse body having the usual wheels 21. The body has a rear end opening which is normally closed by a tailgate 22, the latter being hinged to the upper portion of the rear of the body, as at 23, for swinging movement. The tailgate includes side walls 24 which are connected near the top by top plates 25 having a lower edge 26. Below the lower edge 26 is a collecting opening 27 into which refuse may be deposited by collectors. At the rear portion of the bottom the side walls 24 are connected by a concave bottom-forming plate 28 which has an upwardly projecting rear edge 29 forming the lower margin of the collecting opening 27, the plate extending forwardly and upwardly toward a floor 30 in the tailgate, which is in alignment with the floor 30' of the body (see FIG. 2). In the upper portion of the interior of the tailgate is an inner ceiling 31.

The booms and associated parts Pivoted to the sides of the body on pivots 32 are booms 33. Only one of such booms is shown in FIG. 1 and will be described, but it is to be understood that the opposite side wall 24 of the tailgate has correspondingly positioned parts to match those shown on the left-hand side wall of FIG. 1.

Referring to FIGS. 7 and 9, each boom comprises spaced side plates 34 and 35 which are connected at the top by top plates 36 and at the rear by plate 37 to thereby provide a hollow interior, as is clear from FIGS. 1, 7 and 9. The plate 35 on the inner side of the boom has a forwardly projecting extension ear 38. A cylindrical boss 39 is welded into an opening 40 in the plate 34, and a similar boss 41 is welded into an opening 42 in the plate 35. Each boss has a bushing therein such as the bushing 43 shown in FIG. 7. A shaft 44 extending horizontally through the tailgate has its ends projecting through arcuate slots 55 in the side walls and journaled in the bushings 43 of the bosses 39 and 41 on each side of the tailgate. Within each boom 33 and keyed to the shaft 44 is a double bar lever arm 45. Each boom 33 is inverted Y-shaped having lower legs 46 and 47. A hydraulic cylinder 48 is pivoted at its lower end as at 49 to the boom leg 46. The extensible ram portion 50 is pivoted to the lower end of the adjacent lever arm as .at 51, FIG. 7. A scraper-packer plate 52 has its upper edge welded to the shaft 44, as shown in FIG. 1, and has its lower edge in the form of a scraper blade, as at 53.

Another shaft 54 connects the ears 38 of the booms on the two sides of the tailgate. The ears 38 are so on the pivots 32. The shaft 54 supports the lower edge of an upwardly projecting apron 56, as is clear from FIG. 1.

On each side wall 27 of the tailgate is a boom-operating hydraulic cylinder 57 having its upper end pivotally connected to the side wall, as at 58, and having its extensible ram portion 59 pivotally connected as at 60, to the lower arm portion 47 of each boom. Supported adjacent to the pivot 58 on each of the side walls is a stop block 61.

In order 'to provide for the raising of the tailgate when required there are hydraulic cylinders 62 which are pivoted at one end to the body, as at 63, and which have extensible ram portions pivoted, as at 64, to the tailgate. Extensible movement of the rams 62 will cause raising of the tailgate on the pivots 23.

Operation of the scraper-packer plate A the end of a packing stroke the parts are in the position shown in FIG. 2 wherein the packer plate 52 has exerted a packing force on the refuse to force it into the storage compartment. It is apparent from FIG. 2 that, while the main part of this storage compartment is in the main body 20 of the refuse vehicle, the chamber C in the forward portion of the tailgate between the inner ceiling 31 and the floor portion 30 provides an extension of the storage compartment and increases the effective size thereof.

It is assumed that the refuse collectors have been depositing refuse R in the hopper formed by the concave bottom 28 of the tailgate. As a new cycle starts, cylinders 57 start to slowly retract their rams 59 and simultaneously cylinders 48 start to retract their rams 50. Thus the shaft 44 for the scraper-packer plate 52 starts to move in the slots 55 and the lever arms 45 start to rock the shaft 44 to cause swinging movement of the scraper-packer plate from the position of FIG. 2 to the position of FIG. 3. In FIG. 3 it will be noted that the shaft 44 has moved rearwardly in the slots 55 and that the packer plate has swung upwardly toward horizontal. At the same time the apron 56 moves along beneath the ceiling 31 to maintain a closure for the space above the shaft 44.

The rams 48 and 57 continue to retract until the position of FIG. 4 is reached, where the rams 48 are fully retracted and the scraper-packer plate 52 is in a nearly horizontal position. Thereafter, swinging movement of the scraper-packer plate stops, but swinging movement of the booms on their pivots 32 continues as the rams 59 continue their retraction in the cylinders 57. This causes movement of the parts to the position of FIG. 5 where the scraper-packer plate is ready to start scraping the refuse upwardly and forwardly on the concave bottom 28. To accomplish such scraping movement, extensible movement of the rams 50 in the cylinders 48 begins and the other hydraulic actuators 57 remain out of operation. During such extensible movement of the rams 50 the lever arms 45 are actuated in a direction to swing the scraperpacker plate upwardly and forwardly along the bottom wall 28 as at a in FIG. 6, and ultimately to the position b of FIG. 6. In position b the rams 50 of the cylinders 48 are fully extended. Thereafter, extensible movement of the rams 59 of the cylinders 57 start to again cause pivotal movement of the booms 33 and movement of the parts from position b of FIG. 6 to the packing position of FIG. 2 to end the cycle.

. Automatic safety feature When the scraper-packer plate is moving from the position of FIG. 4 to the position of FIG. 5, if there is a rigid bulky piece of refuse, such as a large stick of wood or metal, resistance to movement of the scraper-packer plate may be encountered. This would normally exert a tremendous strain on the tailgate, packer plate, and associated parts. With the present invention, however, when such an occurrence takes place, the abnormal pressure created in the hydraulic system will actuate a pressure switch having a fluid pressure line 66 leading thereto and cause operations to be hereinafter described, following the description of the electrical and hydraulic circuit.

Electrical and hydraulic circuit Referring to FIG. 10, each time the operator wants the packer plate to re-cycle, he must press the manual start button 70 which is mounted on the curb side of the tailgate. This closes the circuit to the relay coil 76 which closes the switch 77 and provides for flow of current through the relay and through the lines 80 and to the pressure switch. This provides for boom movement, as will be hereinafter explained, and as soon as the booms start to move rearwardly from the position of FIG. 2 such movement allows limit switch 74 to close. This establishes the holding circuit through the relay and lines 80, 75, 73 and 72, keeping the coil 76 energized. There is now power to the pressure switch 65 through the lines and 75. At this stage of operation the pressure switch is in the dotted line position and electric current flows through line 81, through line 82, through line 85, to the solenoid S Electricity also flows through lines 86, 87 and 88 to the solenoid S to shift the spool valve 89 to the right.

The hydraulic system on the right hand side of FIG. 10 includes a reservoir 90 with a hydraulic line 91 leading from the reservoir through the pump 92, through line 93, to the hydraulic spool valve 89. The energization of the solenoid S shifts the spool valve to the right whereby oil can flow from line 93 into line 94 which leads to the retracting side 95 of the boom cylinders 57 to cause retraction of the rams 59. At the same time, oil is exhausted from the boom cylinders 57 through the lines 96 and 97, through the spool valve 89, through lines 98, through the shifted spool valve 99, and through lines 100 and 101 to the retraction side of cylinders 48 to cause retraction of the rams 50. The fluid exhausted from cylinders 48 goes through lines 102 and 103 back to the tank 90. The flow of electric current through the line 82 from the pressure switch and through line 85 has energized the solenoid S to shift the spool valve 99 to the right, whereby the above described operation becomes possible.

This starts both the booms and the packer plate swinging toward the rear from the position of FIG. 2 toward the position of FIG. 3. When the parts arrive at the postion of FIG. 4 where the rams 50 are completely retracted, the limit switch 104 is opened, breaking the circuit to the solenoid S and allowing the valve 99 to return to neutral. The rams 59, however, continue to retract to cause swinging of the boom from the position of FIG. 4 to the position of FIG. 5. When the booms arrive at the position of FIG. 5, one of them hits a stop S which creates a back pressure in the hydraulic system that trips the pressure switch 65 to move the switch lever from the dotted line position of FIG. 10 to the full line position. This de-energizes line 81 and energizes line 105. Line 105 goes through normally-closed limit switch 106 and line 107 to solenoid S to shift the spool valve 99 to the left and cause flow of hydraulic fluid through lines 93, 98, 103 and 102 to cause operation of the packer plate cylinders 48 in a direction so that the rams 50 start to extend and swing the scraper-packer plate from the position of FIG. 5 through the positions a and b of FIG. 6.

Safety feature operation The above described operation is what occurs when everything is working properly. If, however, a bulky, relatively rigid piece of refuse obstructs movement of the packer plate from the position of FIG. 4 to the position of FIG. 5, there will be a stopping of the movement of the booms 33 some time before they hit the stop S (FIG. 5). This stopping due to an obstruction will act the same way as the stop S, that is, it will create a back pressure in the hydraulic system to swing the pressure switch from the dotted line position (FIG. to the full line position. This stops the final retraction movement of the rams 59 of the boom, and immediately shifts the operation over to electric line 105 to start the extension movement of the rams 50 somewhat ahead of time, there- 'by starting swinging movement of the scraper-packer plate while it is held somewhat above normal position a of FIG. 6 so that there is enough space for the lower edge 53 of the scraper-packer plate to ride over the obstructing piece. This will deliver to packing position all of the refuse which is in a level above the obstruction. At the same time, the operator can then pull out the obstructing piece. This safety device, therefore, permits the cycle to continue without interruption, and also prevents abnormal stresses on the parts which might otherwise occur because of the obstruction.

Whether or not the device is operating normally or abnormally, when the packer plate arrives at position b of FIG. 6, it trips the limit switch 106 to the dotted line position, causing electricity to flow through the line 108 to the solenoid 8*. This causes a shifting of the valve 89 to the left and allows hydraulic fluid to flow into the cylinders 57 on a side to cause extension of the rams 59 and cause swinging of the booms and packer plate from position b of FIG. 6 to the position shown in FIG. 2. During this movement the refuse is packed into the storage compartment as augmented in size by the auxiliary chamber C in the tailgate. When the rams 59 are fully extended they move limit switch 74 to the dotted line position to de-energize the coil 76, which allows the switch 77 of the start relay to open, thereby de-energizing the circuits. When the boom gets up to the position of FIG. 2, it hits the switch of the pressure switch 65, forcibly moving it from the solid line position to the dotted line position so that the circuits are ready for a new cycle.

The stop button 109 can be operated at any time to break the electric circuit and interrupt the cycle if there is some obstruction which would require this. If this obstruction is such that it is necessary to raise the booms in order to clear the obstruction, the boom up button 110 may be pressed to cause operation of the boom in a raising direction. As soon as the button is released, the movement of the boom stops. After the obstruction is cleared, the start button may again be pressed to continue the movements, which can be done at any point in the circle.

Various changes and modifications may be made without departing from the spirit of the invention, and all of such changes and modifications are contemplated as may come within the scope of the claims.

What we claim is:

1. In a refuse body having a refuse hopper provided with a bottom and sides, said bottom having a rear portion and a forward portion, booms pivoted to said sides and having upwardly-projecting portions, a scraperpacker plate for scraping refuse from said hopper into said body, a pivotal connection between an upper portion of said scraper-packer plate and upwardly-projecting portions of said booms, operating means operatively connected to said booms and scraper-packer plate for causing simultaneous rearward swinging movement of the booms and swinging of the scraperpacker plate on its pivotal connection with the booms over a load in the hopper to a rearward position, said operating means also providing for independent swinging movement of said scraper-packer plate on its pivotal connection with the booms when the booms are in said rearward position, said booms being so located with respect to the hopper bottom and the hopper bottom being so curved that when the booms are in said rearward position the hopper bottom is concentric with the axis of swinging movement for the scraper-packer plate on its pivotal connection with the booms, whereby the scraper-packer plate may scrape refuse from the rear portion of the hopper to the forward portion thereof while the booms are stationary.

2. A refuse body as defined in claim 1 wherein said operating means is also arranged to provide for forward swinging movement of the booms with the scraper-packer plate after the latter has scraped refuse forwardly in the hopper and after its independent swinging movement has stopped, to thereby cause packing of refuse into the refuse body.

3. A refuse body as defined in claim 1 in which said operating means includes at least one fluid pressure operated ram for causing swinging of the booms, and at least one fluid pressure operated ram for causing swinging of the scraper-packer plate.

4. A refuse body as defined in claim 3 in which the fluid pressure operated ram for the booms is connected between a side of the hopper and a boom, and in which the fluid pressure operated ram for the scraper-packer plate is connected to one of the booms and acts between said boom and the scraper-packer plate.

5. A refuse body as claimed in claim 1 in which there is a ceiling between said sides and above said refuse hopper, and in which there is an apron connected to the upper ends of the booms which projects upwardly toward said ceiling to prevent back flow of refuse.

6. A refuse body as claimed in claim 3 in which the booms and fluid pressure operated rams are mounted externally on the sides of the refuse hopper.

7. A refuse body as claimed in claim 1 in which the pivot for the booms is between lower portions of the booms and lower portions of the hopper sides adjacent the forward portion of the hopper bottom.

8. A refuse body as claimed in claim 3 in which at least one boom has legs projecting angularly forwardly and rearwardly below its pivot, and in which the fluid pressure operating ram for swinging the booms is connected between a hopper side and the forwardly-extending leg, and in which the fluid pressure operated ram for operating the scraper-packer plate is connected to the rearwardly-projecting leg of the boom -to act between said leg and said scraper-packer plate.

9. A refuse body as claimed in claim 1 in which the pivotal connection between the scraper-packer plate and the booms comprises shaft extensions from the plate which are journaled in the booms, and in which there is a lever arm rigidly connected to one of said shaft extensions, and in which the fluid pressure operated ram for swinging the scraper-packer plate is connected between a lower portion of the boom and said lever arm.

10. In a refuse body having a refuse hopper member provided with a bottom and having a scraper member for scraping refuse from said hopper member, said scraper member having a lower scraping edge, mounting means for one of said members providing for relative movement between said scraper member and hopper member to cause disposition of the scraper in a scraping position relative to the hopper member with said scraping edge adjacent said bottom of the hopper member, a fluid pressure circuit, means including a fluid pressure operated ram in said circuit for causing said relative movement, another fluid pressure operated ram operatively connected to said scraper member for causing scraping movement of the latter to remove refuse from the hopper when the parts are disposed in scraping relationship, means including a pressure switch in said hydraulic circuit responsive to back pressure in the circuit when an obstruction is encountered during said relative movement between the hopper member and scraper member for stopping said relative movement toward one another, and means responsive to said stopping for causing premature operation of the first mentioned ram for said scraper member to start premature scraping movement of said scraper member so that the cycle of operation may continue without interruption,

with said scraping edge spaced from the hopper bottom a suflicient distance to ride over the obstruction.

11. In a refuse body having a refuse hopper provided with a bottom and having a scraper for scraping refuse from said hopper, said scraper having a lower scraping edge, mounting means for said scraper providing for movement of said scraper member with respect to said hopper to cause disposition of said scraper in a scraping position relative to the hopper with said scraping edge adjacent said bottom of the hopper, a fluid pressure circuit, means including a fluid pressure operated ram in said circuit for causing said movement of the scraper, another fluid pressure operated ram connected to said scraper for causing scraping movement of the latter to remove refuse from the hopper when the parts are disposed in scraping relationship, means including a pressure switch in said hydraulic circuit responsive to back pressure in the circuit when an obstruction is encountered during said movement of the scraper toward the hopper for stopping said movement, and means responsive to said stopping for causing premature operation of the first mentioned ram for said scraper to start premature scraping movement of said scraper so that the cycle of operation may continue without interruption, with said scraping edge spaced from the hopper bottom a sufficient distance to ride over the obstruction.

12. In a refuse body having a refuse hopper provided with a bottom and having a pivotally-supported scraper for scraping refuse from said hopper, said scraper having a lower scraping edge, booms pivoted to opposite sides of said hopper and having upwardly projecting portions, means including a pivotal connection between said scraper and upwardly projecting portions of said booms providing for movement of said booms and scraper with respect to said hopper to cause disposition of said scraper and its pivotal connection in such a position relative to the hopper that said scraping edge is in scraping position adjacent said bottom of the hopper, a fluid pressure circuit, means including a fluid pressure operated ram in said circuit for swinging said booms on their pivotal connections to cause such movement of the booms, another fluid pressure operated ram between one of said booms and said scraper for causing swinging movement of the latter including swinging movement to remove refuse from the hopper after the parts have been disposed in scraping relationship, means including a pressure switch in said hydraulic circuit responsive to back pressure in said circuit when an obstruction is encountered during said movement of the booms toward the hopper for stopping said movement, and means responsive to said stopping for causing premature operation of the ram for said scraper to start premature refuse scraping swinging movement of said scraper so that the cycle of operation may continue without interruption, with said scraping edge spaced from the hopper bottom a suflicient distance to ride over the obstruction.

13. In a refuse body having a storage compartment and having a refuse receiving tailgate pivoted on the rear end of the storage compartment and having sides and a forwardly and upwardly inclined hopper-forming bottom with an elevated forward edge, booms having lower portions pivoted to the sides of the tailgate adjacent said forward edge of the hopper bottom, a shaft extending transversely of the tailgate and connecting upper ends of the booms, said booms being swingable from a substantially upright position projecting above the forward edge of the hopper bottom to a rearwardly-projecting position, a scraper-packer plate suspended from said boomconnecting shaft and swingable on the axis of said shaft, whereby the scraper-packer plate and booms may swing simultaneously rearwardly to move the scraper-packer plate over the load to a rearward position preparatory to scraping, the hopper bottombeing concentric with respect to the axis of swinging movement of the scraper-packer shaft when the booms are in said rearwardly-projecting position and so disposed that the scraper-packer plate may then swing on its shaft axis to scrape refuse from the rear of the hopper bottom to the forward edge thereof, operating means for swinging said booms, and operating means for swinging said scraper-packer plate.

14. A refuse body as claimed in claim 13 in which the tailgate has a ceiling and a floor, with the latter extending forwardly from the forward edge of the hopper-forming bottom, and in which the operating means for the booms functions to swing the booms, together with the scraperpacker plate, to packing position to deliver refuse from the hopper into the compartment formed between the floor and ceiling of the tailgate after the scraper-packer plate has scraped refuse from the hopper bottom, which compartment increases the effective size of the refuse body.

' 15. In a refuse body having a storage compartment and having a tailgate pivotally connected to the rear of the body and provided with oppositely disposed sides, and with a collecting opening at its rear, a forwardly and upwardly curved bottom for said tailgate forming a hopper to receive refuse deposited in the collecting opening, booms having lower portions pivoted to lower external side portions of the tailgate, a shaft extending transversely through the tailgate and having its ends connecting upper end portions of said booms, there being openings in the side wall through which said shaft ends extend, a scraperpacker plate suspended from said shaft within the tailgate, fiuid pressure-operated means pivotally connected between lower portions of said booms and said shaft for rocking the latter to cause pivotal movement of the scraper-packer plate relative to the booms, fluid pressureoperated means pivotally connected between external side Walls of the tailgate and the booms for causing swinging movement of the booms on their pivots, the pivot for said booms and for the scraper-packer plate being so located relative to the hopper bottom as to provide for the hereinafter described movements, and control means for the fluid-pressure operated means to cause the following sequence of such movements: first, a swinging of the scraper-packer plate upwardly and rearwardly on its pivot axis away from packing position while the booms are simultaneously swinging in a rearward and downward direction on their pivots until the scraper-packer plate is in a rearwardly projecting position over the load; second, a continued swinging of the booms without independent swinging of the scraper-packer plate until the lower edge of the scraper-packer plate is in a position to start scraping refuse forwardly and upwardly along the hopper bottom; third, a swinging of only the scraper-packer plate on its pivot axis until its scraping edge has traveled the length of the hopper bottom; and, finally, a swinging of only the booms to bring the scraper-packer plate into substantially upright packing position. i

16. A refuse body as claimed in claim 15 in which the forwardly and upwardly curved bottom of the tailgate leads to a tailgate floor whereby the final swinging movement of the booms causes the scraper-packer plate to deliver refuse from the hopper into the tailgate compartment above said tailgate floor, which compartment increases the effective size of the refuse body storage compartment.

GERALD M. FORLENZA, Primary Examiner. A. J. MAKAY, Assistant Examiner.

Claims (1)

1. IN A REFUSE BODY HAVING A REFUSE HOPPER PROVIDED WITH A BOTTOM AND SIDES, SAID BOTTOM HAVING A REAR PORTION AND A FORWARD PORTION, BOOMS PIVOTED TO SAID SIDES AND HAVING UPWARDLY-PROJECTING PORTIONS, A SCRAPERPACKER PLATE FOR SCRAPING REFUSE FROM SAID HOPPER INTO SAID BODY, A PIVOTAL CONNECTION BETWEEN AN UPPER PORTION OF SAID SCRAPER-PACKER PLATE AND UPWARDLY-PROJECTING PORTIONS OF SAID BOOMS, OPERATING MEANS OPERATIVELY CONNECTED TO SAID BOOMS AND SCRAPER-PACKER PLATE FOR CAUSING SIMULTANEOUS REARWARD SWINGING MOVEMENT OF THE BOOMS AND SWINGING OF THE SCRAPER-PACKER PLATE ON ITS PIVOTAL CONNECTION WITH THE BOOMS OVER A LOAD IN THE HOPPER TO A REARWARD POSITION, SAID OPERATING MEANS ALSO PROVIDING FOR INDEPENDENT SWINGING MOVEMENT OF SAID SCRAPER-PACKER PLATE ON ITS PIVOTAL CONNECTION WITH THE BOOMS WHEN THE BOOMS ARE IN SAID REARWARD POSITION, SAID

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