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Publication numberUS3661285 A
Publication typeGrant
Publication dateMay 9, 1972
Filing dateAug 5, 1970
Priority dateAug 5, 1970
Also published asCA933121A1
Publication numberUS 3661285 A, US 3661285A, US-A-3661285, US3661285 A, US3661285A
InventorsAppleman William S
Original AssigneeHarsco Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Refuse handling apparatus
US 3661285 A
Abstract
A refuse handling vehicle of the front-loading type provided with improved lift and dump apparatus for dumping waste materials from containers into the container of the vehicle. The machine is characterized by improved lift arms which are constructed to be resiliently yieldable so as to absorb shocks and stresses encountered during the pick-up and dumping of refuse containers.
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United States Patent Appleman 1 May9,1972

[54] REFUSE HANDLING APPARATUS [72] lnventor: William S. Appleman, Galion, Ohio [73] Assignee: Harsco Corporation, Camp Hill, Pa.

[22] Filed: Aug. 5, 1970 [21] App1.No.: 61,113

[52] [1.5. CI ..214/302, 214/142 [51 Int. Cl. ..B65f 3/04 [58] Field ofSeareh ..212/144, 145; 214/302, 131, 214/142, 143

[56] References Cited UNITED STATES PATENTS 3,338,438 8/1967 l-loltkamp ..214/302 Dempster et a1 ..214/302 3,278,059 10/1966 Ridgeway et al ..214/302 3,217,913 11/1965 Aldredge et a1. ...214/302 2,224,789 12/1940 Kurtz et a1. ..214/503 Primary Examiner-Gerald M. Forlenza Assistant Examiner-Lawrence J. Oresky Attorney-Schmieding & Fultz [5 7] ABSTRACT A refuse handling vehicle of the front-loading type provided with improved lift and dump apparatus for dumping waste materials from containers into the container of the vehicle. The machine is characterized by improved lift arms which are constructed to be resiliently yieldable so as to absorb shocks and stresses encountered during the pick-up and dumping of refuse containers.

14 Claims, 8 Drawing Figures PATENTEBMY 9 1912 SHEET 1 OF 5 INVENTOR. WILL/AM 5. APPLE/V4 ATT RNEYS PATENTEDMAY 9 I972 SHEET 2 BF 5 INVENTOR. WILLIAM S. APPLEMAN ATTZR NEYS WILL/AM s, APE 15% AHZRNEYS PATENTEDMM 9 1972 SHLU U UF 5 INVENTOR. WILLIAM S. APPLE/WAN ATTO NEYS PATENTED MAY 9 I972 f-LHEH 5 OF 5 INVENTOR. WILLIAM s. APPLEMAN f Jultl ATTO EYS REFUSE HANDLING APPARATUS This invention relates generally to refuse handling equipment and more particularly to improved front-loading type lift and dump apparatus for dispensing waste materials from containers into refuse collecting vehicles.

In general, the improved lift and dump apparatus of the present invention comprises novel lift arm apparatus of composite or sectional construction, adapted for mounting on a refuse collecting truck for the front end loading thereof, which lift arm apparatus is constructed to be resiliently yieldable so as to absorb shocks and stresses encountered during the pickup and dumping of refuse containers.

As another aspect of the present invention, the lift and dump apparatus incorporates a novel latch type container engaging latching mechanism adapted for use with vehicle mounted articulated lift arms of the over-the-cab type.

As still another aspect of the present invention, the improved lift and dump apparatus comprises independently yieldable right and left lift arms adapted to apply substantially equally distributed lifting force to both sides of a refuse container at the container engaging portion of the lifting operation, notwithstanding any non-level disposition of the container on irregular terrain.

It is therefore an object of the present invention to provide an improved lift and dump apparatus for front loading type refuse collecting trucks which apparatus is resiliently yieldable so as to absorb shocks and stresses during container pick-up and dumping operations.

It is another object of the present invention to provide an improved lift and dump apparatus that incorporates novel latch type container engaging means adapted for use with over-the-cab type lift arm constructions.

It is still another object of the present invention to provide an improved lift arm construction for front loading type refuse trucks that substantially, equally distributes the container imposed pick-up stresses to two spaced lifting arms.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein a preferred form of embodiment of the invention is clearly shown.

IN THE DRAWINGS:

FIG. 1 is a side elevational view of a refuse collecting vehicle provided with lift and dump apparatus constructed in accordance with the present invention attached thereto;

FIG. 2 is a side'elevational view of a lift arm assembly of the vehicle of FIG. 1;

FIG. 3 is a side elevational view of a modified lift arm assembly for use with the apparatus of FIG. 6;

FIG. 4 is a partial side elevational view of a resilient arm joint comprising a portion of the lift arm assemblies of FIGS. 2 and 3, said arm being in a loaded configuration;

FIG. 5 is a second partial side elevational view of the resilient arm joint of FIG. 4 showing the joint with the arm assembly in an unloaded configuration;

FIG. 6 is a side elevational view showing the modified lift arm assembly of FIG. 3 mounted on a refuse collecting vehicle;

FIG. 7 is a sectional view through the resilient arm joint of FIG. 4 and 5, the section being taken along the line 7-7 of FIG. 4; and

FIG. 8 is a partial front sectional view of the modified lift arm assembly of FIG. 3, the section being taken along the line 8-8 of FIG. 3.

Referring in detail to the drawings, a refuse collecting vehicle is illustrated in FIG. 1 and includes a body indicated generally at 20 that is provided with a top refuse receiving opening 21 and a lift arm assembly indicated generally at 22 and pivotally mounted to the frame of the vehicle at a pivot 32.

In general, the lift arm assembly 22 is actuated between a lower pickup position of FIG. 1, wherein the lift arm assembly is adapted to engage a refuse container indicated generally at 23, and a dumping position of FIG. 6, wherein the container is overturned so as to discharge waste material into the previously mentioned top body opening 21. The mechanism for actuating the lift arm assembly comprises a power cylinder 34 which includes an upper pivotal connection with the body at a pivot 36 and a lower pivotal connection with a lever arm 39 at a pivot 38. Lever arm 39 is rigidly connected to the rear end of a rear lift arm section 28 so as to pivot it about the lift arm pivot 32.

Referring particularly to FIGS. 1 and 2, the lower front ends of lift arms 22 are provided with two spaced container engaging means indicated generally at 40 each of which includes a forwardly extending leg member 27 pivotally mounted to the lower front end of a respective front lift arm section 30 at a leg pivot 52.

With continued reference to FIGS. 1 and 2, each of the legs 27 can be arcuately manipulated between the positions shown in dotted delineation in FIG. 2 by a leg actuating power cylinder 46 having an upper pivotal connection 44 with a cylinder bracket 42 and a lower pivotal connection 50 on leg 27.

In general, leg actuating cylinders 46 are used for the final overturning and dumping of the container 23 after the arm assemblies 22 have been actuated to a dump position wherein a container 23 overlies top body opening 21.

With continued reference to FIGS. 1 and 2, each of the legs 27 includes an upwardly facing open-ended slot 62 for embracing a respective one of a pair of oppositely extended container lugs 25 when the lift arm assemblies 22 are lifted from the position of FIG. 1 to a position wherein slots 62 on the forward end of legs 27 move upwardly into surrounding engagement with container lugs 25.

As seen in FIGS. 1 and 2, the forward ends of legs 27 each include a latch member or hook 58 pivotally mounted to the leg 27 at a pivot 60. A latch actuating link 68 includes a fixed rear pivotal connection 54 on a fixed arm 53 which is always stationary with respect to front arm section 30 and a front pivotal connection 64 with latch member 58 eccentric of latch pivot 60 such that when power cylinder 46 is pressurized at its rod end so as to retract rod 124, then leg 27 is pivotted clockwise about its rear leg pivot 52 whereby latch member 58 is pivotted clockwise to close slot 62 and retain container lugs 25 therein.

The latch closing action just described functions to retain the container within slot 62 when leg 27 is overturned with the lift arm assemblies 22 in the dumping position illustrated in dotted delineation in FIG. 6.

With continued reference to the embodiment of FIGS. I and 2, the lift arm assemblies 22 each includes a resilient arm joint apparatus indicated generally at 31 and illustrated in enlarge detail in FIGS. 4, 5 and 7. Such resilient arm joint apparatus comprises an arm pivot pin 70 extended through spaced lug sections 33 of rear arm section 28 and a center lug 35 of front arm section 30 with a grease fitting 37 being provided for lubricating the pivot pin 70 and lug portions.

With continued reference to FIGS. 2, 4 and 7, resilient arm joint 31 further includes confronting end surfaces 78 and 80 at the junction of the arm sections and a resilient bumper 76 is mounted on one of these surfaces 80 by a plurality of counter sunk studs 100 and arranged to engage the other of the surfaces 78 as seen in FIG. 4 when the lift arm assemblies 22 are subjected to load applied by a counter-clockwise torque about their arm pivots 70.

As is best seen in FIGS. 4, 5, and 7, the resilient arm joint apparatus 31 further includes a lost motion connection formed by guides 82 and 84 which are respectively mounted on front arm sections 30 and 28 and include the alignedbores 94 and 98. A rod 86 extends freely through the bores 94 and 98, as well as through a bore 98 in a rigid stop member 96, and such rod includes nuts 88 and 90 mounted on threaded end portions thereof.

It will now be understood that the lost motion connection just described permits yielding by limited pivotal movement of front arm section 30 relative to rear arm section 28 about arm pivot 70 between the loaded configuration of FIG. 4 and the unloaded configuration of FIG. 5. In the loaded configuration of FIG. 4 resilient bumper 76 is compressed and a space exists between guide 82 and nut 88. In the unloaded configuration of FIG. 5, resilient bumper 76 expands and a space is now present between spacer 96 and guide 84.

It should be mentioned that when load is applied to the lift arm assemblies 22, front arm sections 30 force resilient cushions 76, formed of synthetic rubber or the like, into compressed engagement with end surfaces 78 on rear arm section 28 with the compression of resilient bumpers 78 being limited by the axial length of rigid stop members 96.

Reference is next made to a modified lift arm assembly of FIGS. 3 and 6 which includes the resilient arm pivot 31 just described, but which is also provided with a fork-type container engaging assembly 102 in place of the hook-type 40 utilized with the arm assembly of FIGS. 1 and 2.

A refuse collecting vehicle provided with such fork-type lift apparatus is partially illustrated in FIG. 6 with details of the modified container engaging assembly 102 being illustrated in FIGS. 3 and 8. Such container engaging assembly 102 includes a pair of spaced forwardly extending forks or arms 106 said assembly being mounted on lower ends of front arm sections 30. The entire assembly is pivotally mounted at the lower arm pivots 52, FIGS. 3 and 6, and include a pivotal connection 134 with the lower end of rod 124 of power cylinder 104 such that when the power cylinder is energized, the fork assembly swung arcuately in the manner illustrated in dotted delineation in FIG. 3.

In general, forks 106 are adapted to engage longitudinally extending open-ended channels on the sides of a container upon advancement of the vehicle with the forks 106 positioned horizontally, whereby the spaced forks 106 are inserted into said horizontally extending channels, not illustrated. In addition, each of the forks 106 includes a protrusion or shoulder 108 in its forward end so as to retain the container sockets or channels on the fork.

As seen in FIG. 8, a sectional view taken along the line 88 in FIG. 3, the forked member 106 can each be removably mounted between the pivotally mounted fork mounting plates 126 by longitudinally spaced bolts 128, extended between the plates and through bores in the rear end of the fork 106, thereby permitting removal or replacement of the forks.

Also, the lateral spacing between the forks can be varied, as shown in dotted delineation at 106 in FIG. 8, so as to permit the forks to be used with refuse containers of different widths. Lever actuated cam mechanisms, not illustrated, can be used for anchoring the forks 106 at various lateral locations along the transverse mounting pins 128.

With further reference to FIG. 8, a transverse beam 130 extends between the fork mounting plate assemblies 126 so as to add rigidly to the entire lift arm assembly.

FIG. 8 further shows, in section, the detail of the pivotal connection between rod 124 of power cylinder 34 and a pivot pin I34, FIGS. 3 and 6, that connects such rod to fork mounting plates 126. It will be noted that such pivotal connection, FIG. 8, includes a rod end bearing member 132 disposed in a slot 133 in pivot bracket 122 and a pivot pin 134 is mounted in a lateral bore 51 in the pivot bracket.

In operation of either the embodiment of FIG. 1 or the embodiment of FIG. 6, after a container has been engaged by the container engaging means 40 of FIG. 1 or 102 of FIG. 6, and the vehicle is inadvertently further advanced such that the container is urged against an obstruction, such as a wall of a loading clock, the resilient arm joints 31 permit resilient yielding movement of front arm sections 30 about arm pivots 70 causing resilient cushions 76 to be compressed. At this point, any sudden shock stresses will be absorbed by resilient cushions 76, thereby greatly reducing the possibility of damage to the mechanisms of the lift arm assemblies and container,

Also, it should be pointed out that since the right and left lift arm assemblies 22 can yield independently into engagement with container 23, such engagement is facilitated in the event that the container is disposed on an uneven surface with the lug 25 on one side lower than the lug 25 on the other side since as the lift arms are pivotted around the rear pivot 32 to cause engagement of slots 62 with the container lugs 25, one of the container lugs at the low side of the unevenly positioned con' tainer will first be engaged and the front arm section on such side is free to yield due to the compressibility of resilient cushion 76 until the slot 62 on the high side of the container has moved up into engagement with its respective container lug 25. As the pivotting of the lift arms continues, both the right and left container engaging slots 62 will be in contact with respective lugs 25 as the lifting force is transmitted to the loaded container. It will now be understood that engagement, at the point of pickup, is insured at both lugs of the container, even through such container is unevenly disposed on a nonuniform supporting surface.

I claim:

1. Material lifting and dumping apparatus for a front-loading vehicle provided with an open top receptacle comprising, in combination, support means attached to said vehicle; lift arms means pivotally connected to said support means and including right and left arms of composite construction extending upwardly, forwardly and downwardly and including resilient arm joint pivot connecting a front arm section to a rear arm section container engaging means mounted on the ends of said arms; a container including pick-up means for detachable connection with said container engaging means; means for pivoting said lift arms on said supporting means to lift said container to a position above said open top receptacle; and actuating means for said container engaging means for pivoting said container to an overturned dumping position.

2. Material lifting and dumping apparatus for a front-loading vehicle provided with an open top receptacle comprising, in combination, support means attached to said vehicle; lift arms means pivotally connected to said support means and in cluding right and left arms of composite construction extending upwardly, forwardly and downwardly and including a front arm section connected to a rear arm section; a resilient arm joint mounting said front arm section on said rear arm section and comprising an arm pivot between said sections and a lost motion connection between said sections and spaced from said arm pivot; container engaging means mounted on the ends of said arms; a container including pick-up means for detachable connection with said container engaging means; means for pivoting said lift arms on said supporting means to lift said container to a position above said open top receptacle; and actuating means for said container engaging means for pivoting said container to an overturned dumping position.

3. The apparatus defined in claim 2 wherein said front and rear arm sections include spaced confronting end surfaces; and a resilient bumper mounted on one of said end surfaces.

4. The apparatus defined in claim 2 wherein said lost motion connection includes a front connection portion on said front arm section, a rear connection portion on said rear arm section, axially aligned bores through said connection portions, and rod means extended through said bores and including end stop means limiting movement of said connection portions.

5. The apparatus defined in claim 2 wherein said lost motion connection includes a front connection portion on said front arm section, a rear connection portion on said rear arm section, axially aligned bores through said connection portions; rod means extended through said bores and including end stop means limiting movement of said connection portions; and a stop member on said rod means between said connection por tions.

6. The apparatus defined in claim 2 wherein said front and rear arm sections include spaced confronting end surfaces; a resilient bumper mounted on one of said end surfaces; and wherein said lost motion connection includes a front connection portion on said front arm section, a rear connection portion on said rear arm section, axially aligned bores through said connection portions, and rod means extended through said bores and including end stop means limiting movement of said connection portions.

7. Material lifting and dumping apparatus for a front-loading vehicle provided with an open top receptacle comprising, in combination, support means attached to said vehicle; lift arm means pivotally connected to said support means and including right and left arms extending upwardly, forwardly and downwardly, said arms being of composite construction and including resilient arm section pivots joining front arm sections to rear arm sections; right and left leg members pivotally mounted on vertically extending front portions of said right and left arms, said leg members being normally extended horizontally forwardly from rear leg pivots on said vertically extending arm portions and including normally vertically disposed slot means; a container provided with outwardly extending lug means on opposite sides thereof for slideable engagement by said slot means; a latch member movably mounted on the forward end of each of said leg members and including a lug engaging shoulder for retaining said lug means in said slot; a leg actuating power cylinder including an upper pivotal connection with said vertically extending front arm portion above said rear leg pivot and a lower pivotal connection with said leg forwardly of said rear leg pivot, the longitudinal axis of said leg actuating power cylinder being vertically disposed when said leg portions are in a normal horizontally extending position; a latch actuating link including a rear pivot connection with said vertically extending front arm portion and a front pivotal connection with latch member; and means for pivoting said left arms on said support means.

8. Material lifting and dumping apparatus for a front-loading vehicle provided with an open top receptacle comprising, in combination, support means attached to said vehicle; lift arms means pivotally connected to said support means and including right and left arms of composite construction extending upwardly, forwardly and downwardly and including a resilient arm joint pivot connecting a front arm section to a rear arm section right and left leg members pivotally mounted on vertically extending front portions of said right and left arms, said leg members being normally extended horizontally forwardly from rear leg pivots on said vertically extending arm portions and including normally vertically disposed slot means; a container provided with outwardly extending lug means on opposite sides thereof for slideable engagement by said slot means; a latch member movably mounted on the forward end of each of said leg members and including a lug engaging shoulder for retaining said lug means in said slot; a leg actuating power cylinder including an upper pivotal connection with said vertically extending front arm portion and a lower pivotal connection with said leg; linkage means for actuating said latch member responsive to pivoting of said leg by said leg actuating power cylinder; and means for pivoting said lift arms on said support means.

9. Material lifting and dumping apparatus for a front-loading vehicle provided with an open top receptacle comprising, in combination, support means attached to said vehicle; lift arms means pivotally connected to said support means and including right and left arms of composite construction extending upwardly, forwardly and downwardly and including a front arm section connected to a rear arm section; a resilient arm joint mounting said front arm section on said rear arm section and comprising an arm pivot between said sections and a lost motion connection between said sections and spaced from said arm pivot; right and left leg members pivotally mounted on vertically extending front portions of said right and left arms, said leg members being normally extended horizontally forwardly from rear leg pivots on said vertically extending arm portions and including normally vertically disposed slot means; a container provided with outwardly extending lug means on opposite sides thereof for slideable engagement by said slot means; a latch member movably mounted on the forward end of each of said leg members and includin a lug engaging shoulder for retaining said lug means in sai slot; a leg actuating power cylinder including an upper pivotal connection with said vertically extending front arm portion and a lower pivotal connection with said leg; linkage means for actuating said latch member responsive to pivoting of said leg by said leg actuating power cylinder; and means for pivoting said left arms on said support means.

10. The apparatus defined in claim 9 wherein said front and rear arm sections include spaced confronting end surfaces; and a resilient bumper mounted on one of said end surfaces.

11. The apparatus defined in claim 9 wherein said lost motion connection includes a front connection portion on said front arm section, a rear connection portion on said rear arm section, axially aligned bores through said connection portions, and rod means extended through said bores and including end stop means limiting movement of said connection portions.

12. The apparatus defined in claim 9 wherein said lost motion connection includes a front connection portion on said front arm section, a rear connection portion on said rear arm section, axially aligned bores through said connection portions; rod means extended through said bores and including end stop means limiting movement of said connection portions; and a stop member on said rod means between said connection portions.

13. The apparatus defined in claim 9 wherein said front and rear arm sections include spaced confronting end surfaces; a resilient bumper mounted on one of said end surfaces; and wherein said lost motion connection includes a front connection portion on said front arm section, a rear connection portion on said rear arm section, axially aligned bores through said connection portions, and rod means extended through said bores and including end stop means limiting movement of said connection portions.

14. Material lifting and dumping apparatus for a front-loading vehicle provided with an open top receptacle comprising, in combination, support means attached to said vehicle; lift arms means pivotally connected to said support means and including right and left arms of composite construction extending upwardly, forwardly and downwardly and including a resilient arm joint pivot connecting a front arm section to a rear arm section right and left leg members pivotally mounted on vertically extending front portions of said right and left arms, said leg members being normally extended horizontally forwardly from rear leg pivots on said vertically extending arm portions and including normally vertically disposed slot means; a container provided with outwardly extending lug means on opposite sides thereof for slideable engagement by said slot means; a latch member movably mounted on the forward end of each of said leg members and including a lug engaging shoulder for retaining said lug means in said slot; a leg actuating power cylinder including an upper pivotal connection with said vertically extending frontarm portion above said rear leg pivot and a lower pivotal connection with said leg forwardly of said rear leg pivot, the longitudinal axis of said leg actuating power cylinder being vertically disposed when said leg portions are in a normal horizontally extending position; a latch actuating link including a rear pivot connection with said vertically extending front arm portion and a front pivotal connection with latch member; and means for pivoting said left arms on said support means.

t I i i

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2224789 *Feb 13, 1939Dec 10, 1940Kurtz Loron GRefuse collecting truck
US3112834 *May 9, 1960Dec 3, 1963Dempster Brothers IncFront end loaders
US3217913 *Nov 8, 1962Nov 16, 1965Container Service Company IncMaterial handling device
US3278059 *Nov 16, 1964Oct 11, 1966Appleman William SLift and dump apparatus for refuse containers
US3338438 *May 23, 1966Aug 29, 1967Pak Mor Mfg CompanyRefuse collecting vehicle with front end container lifting and dumping mechanism
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5658117 *Aug 18, 1995Aug 19, 1997The Heil CompanyClamp connector for a front end loading refuse collection vehicle
US5984609 *Feb 23, 1998Nov 16, 1999Mcneilus Truck And Manufacturing, Inc.Lifting and tipping mechanism for front loading refuse truck
US6027299 *Dec 31, 1997Feb 22, 2000Kann Manufacturing CorporationAdapter and method for emptying rear end loading waste containers using front loading waste vehicles
US6033176 *Mar 5, 1999Mar 7, 2000Mcneilus Truck And Manufacturing, Inc.Lifting and tipping mechanism for front loading refuse truck
US6224317Dec 7, 1999May 1, 2001Kann Manufacturing CorporationFront end loader adapter
US7674084Apr 30, 2007Mar 9, 2010Cnh America LlcHydraulically cushioned backhoe boom bumper and travel limiter
US8584362 *Nov 6, 2008Nov 19, 2013Wayne Industrial Holdings, LlcThree piece lift arm apparatus and method
US20130287541 *Apr 30, 2013Oct 31, 2013Fred P. SmithTrunnion bar restraining system for rear loading garbage trucks
EP2184239A1 *Nov 5, 2009May 12, 2010Wayne Engineering CorporationLift arm section and method for its assembling
WO1999033717A1 *Dec 31, 1998Jul 8, 1999Kann Mfg CorpAdapter and methods for emptying rear end loading waste containers using front loading waste vehicles
Classifications
U.S. Classification414/408, 414/719
International ClassificationB65F3/02, B60P1/00, B60P1/50
Cooperative ClassificationB60P1/50, B65F3/04, B65F2003/0279
European ClassificationB60P1/50, B65F3/04
Legal Events
DateCodeEventDescription
May 18, 1981AS02Assignment of assignor's interest
Owner name: ATHEY PRODUCTS CORPORATION, RALEIGH, NC. 27602, A
Effective date: 19810511
Owner name: HARSCO CORPORATION
May 18, 1981ASAssignment
Owner name: ATHEY PRODUCTS CORPORATION, RALEIGH, NC. 27602, A
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HARSCO CORPORATION;REEL/FRAME:003853/0916
Effective date: 19810511