US2422985A

US2422985A - Earth handling implement

Info

Publication number: US2422985A
Application number: US543466A
Authority: US
Inventors: Laurence L Reckler
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-07-04
Filing date: 1944-07-04
Publication date: 1947-06-24
Anticipated expiration: 1964-06-24

Description

June 24, 1947.

L. L. RE CKLER EARTH HANDLIENG IMPLEMENT 6 Sheets-Sheet 1 Filed July 4, v194,4

ATTORN EYS June 24, 1947. L. RECKLER ,4

EARTH HANDLING IMPLEMENT Filed July 4, 1944 6 Sheets-Sheet 2 INVENTOR 55 v .L. L.Reckl er BY wrwil ATTO'RN sYs June 24, 1947. 1.. RECKLER 2,422,935

EARTH HANDLING IMPLEMENT Filed July 4, 1944 6 Sheets-Sheet 3 INVENTOR L..L.Reckler mml/ ATTORNEYS Julie 24, 1947. L. L. RECKLER EARTH HANDLING IMPLEMENT 6 Sheets-Sheet 5 Filed July 4, 1944 Fig.5

INVENTOR Z.L.Reckler ATTORN EYS June 24, 1947.

L. L. RECKLER EARTH HANDLING IMPLEMENT Filed July'4, 1944 6 Sheets-Sheet 6 INVENTOR L.L.Reckler ATTORNEYS Patented June 24, 1947 UNITED STATES; PATENT 0F FICE HANDLING: IMPLEMENT Laurence L. Heckler, Sliparlfis, N ev. Application July 4,1944, Serial No. 543,466

25 Claims.

Thisinyention relates. in. general toan improyed earth handling. implement, and in; particular the invention is directedto, and it is an objectto provide, an earth transporting implement v embodying a rotary bowl unit, together-with drive and. control mechanismstherefor. oi novelconstruction and. operation.

Another object of the -.present-'in vention is. to-

provide earthtransporting implement embodying a rotary bow-l unitwh-ich includes a loading opening. with. which: a movable doorassembly cooperates, anda; Dower unit operatively C011?- nected, with the bowl bye drivingmechanism to rotate said bowl in either direction, selectively;

the door assembly being opened or closed by" said power. unitin-adyanceot rotativemovement of the. bowl thereby;

A furthenobject; of this; invention is to provide an earth, transporting implement, asv in the preceding paragraph, in which such driving mechanism is arranged so that actuation, thereof'in one direction and'when' the-door assembly is open, first. closes the door assembly and their rotates the bowl; and so that actuation ofsaidmechanism in the opposite direction and when the". door assembly iscloSed, first acts to open-said door assembly followed byrotation-of the bowl if so desired.

It is also. anobjectof this invention to provide.

an earth transporting implement including a rotary bowl unit havinga loading opening and a movable doorassembly cooperating therewith; aportion of the door assembly; carrying an earth cutting. and digg ng blade, and said portion being,

operative, when the assembly is open and thethe materialv therein; therebeing meansemployed to. preyent tloss oii-material throughthe for-am;- inous portion of the bowl during loading. and transportingthereof Theimplementlsespecially useiuldn. surface mining. reactconstruction, or

2 then-he; wherein operations, as above, are necest These. objects I; accomplish by means of such structure and relative arrangement of parts, as, will: fully appear by" a perusal of the following specification and claims.

In the drawingsisi-milar characters or reference indicatercorrespond-ing parts in the several views: Figure lis a side-elevation: of the implement with the rotary bowl unit shown with the door assembly open, and; in digging position.

Eigu-re zis'an enlarged fragmentary plan View illustrating the: rotary bowl unit andadjacent p rt5;

Figure ,3} is a. sectional elevation on line 3---3 mentcomprises a main frame, indicated generally at l; which'includes transverselyspaced longitudinally extending side plates Z rigidly connected together'by suitable cross:members; the main frame lobeing supported adjacent its rear end by transversely spacedground engaging wheels 3.

At the forward end the main frame I is supported by a swivel truck 4, which: includes wheel's-5 and aiorwardlyextending draftto-ngue 6 adapted for connection with. a. tractor.

A rotary bowl; indicated generally at l, is disposed between the side plates 2 intermediate the rearwhee'lsiand front truck 4} saidrotary bowl being. disposed" with its axis extending horizontally and transversely of the present implement.

The rotary bowl 1 includes substantially circular end walls 8 which areturnably mounted on' and supported by a non-rotatable, tubular cross shaft 5: whose: outerends are carried in slide blocks. II which ride in guided relation in up standing arcuate slots H] in corresponding side plates .2; the slots H being formed concentric to another cross shaft l2 which extends between the side. plates-2 to the rear-of the-rotary bowl and for the purpose as will hereinafter appear.

The cross shaft 9 is supportedadjacentoppo- 3 site ends, and for vertical adjustment of the bowl, by means of corresponding bellcranks l3 which are pivotally mounted intermediate their ends to corresponding side plates 2, as at I4; said bellcranks being disposed between the ends of the rotary bowl I and said plates 2, with one leg iii of each bellcrank projecting forwardly from the corresponding pivot l4, and. the other leg It extending upwardly from said pivot. At the forward ends thereof the legs I5 are longitudinally slotted, as at H, and adjacent portions of the cross shaft 9 project through and ride in such slots. These slotted portions of the legs I5 form in effect lost-motion connections. At their upper ends the legs H5 are connected by a rigid cross beam l8, and a cable-type block and tackle unit I9 connects between said cross beam l8 centrally of its ends and a corresponding but rearward point on the main frame I, as clearly shown in Fig. 1. The block and tackle unit I9 includes a pull reach which extends forwardly along one side of the main frame I about suitable directionchanging sheaves 2|, and said pull reach is .adapted at its forward end to connect with the power winch (not shown) on the tractor. As is evident, actuation of the pull reach 20 in a direction to shorten or lengthen the block and tackle unit 19 will result in swinging of the bellcranks l3 in a direction to raise or lower the bowl, respectively.

The rotary bowlis formed on one side with a transverse loading opening 22 of substantial circumferential extent, but of an extent somewhat less than 180. On the side generally opposite the opening 22, and for a circumferential extent of approximately 180 the side wall of the bowl is perforate or foraminous from end to end thereof, as shown at 23.

The load opening 22 is adapted to be closed by a door assembly which comprises the following:

An arcuate door 24 matchingly engages the outside of the bowl unit on one side of the opening 22 and extends from end to end of the latter; said arcuate door being adapted for circumferential sliding movement from a position clear of opening 22. as shown in Fig. 3, to a position closing substantially one-half of said opening, as shown in Fig. 5. This arcuate door is supported from the ends and for such sliding movement by radial legs 25 of bellcranks 26, one of which is disposed at each end of the bowl; such bellcranks each including another leg 21 disposed at substantially a right angle to leg 25. The bellcranks 26 are rotatably journaled intermediate their ends on shaft 9, and inwardly of the bowl liftinglegs l5.

The remaining one-half of opening 22 is adapted to be closed by another door 28 which is substantially straight both transversely and circumferentially of the bowl unit; said door 28 being pivoted along one side to the bowl unit, on a transverse pivot 29, whereby the door 28 can swing from a closed position relative to opening 22, as shown in Fig. 5, to an open and outwardly projecting position substantially tangentially of the bowl, as shown in Fig. 3.

At the side opposite the pivots 29 the door 28 is formed with a transversely extending ground cuttingand digging blade 30; said blade substantially contacting the arcuate door 24 when

doors

24 and 28 are closed. (See Fig. 5.) The door 28 includes rigid generally radially inwardly extending side wings 3| which serve to guide material into the bowl when the door 28 is open and in ground digging'position.

The assembly of

doors

24 and 28 is opened or closed, and the bowl unit 1 is rotated, by a power drive and control mechanism which comprises, at each end of the bowl unit, the following:

A relatively large-diameter sprocket 32 is rotatably mounted on the tubular cross shaft 9, but held thereon against axial displacement; said sprocket being disposed axially outwardly of the corresponding bellcrank 26. The bellcrank 26 and corresponding side wing 3| are disposed in the same radial plane. An elbow link 33 connects at one end with the sprocket 32 at an eccentric point 34, and connects at the other end, as at 35, to said corresponding side wing 3| radially inwardly from the door 28 and adjacent the edge opposite door pivot 29; the elbow of link 33 extending or bowing in a direction away from cross shaft 9, and opposite bellcrank 26.

When the door assembly is closed, as shown in Fig. 5, the elbow link 33 is disposed with the elbow closely adjacent cross shaft 9, whereby the pivot points 34 and 35 pass beyond dead center relative to the axis of said shaft, which tends to maintain door 28 closed.

The bellcrank leg 2'! is formed at its outer end with a rounded cam face 36 which is adapted to be engaged by an adjacent edge portion of the corresponding side wing 3|, and a flexible link 37, such as a short length of cable, connects be- .tween the bellcrank leg 21 and said side wing adjacent and in generally intersecting relation to said cam face. The link 31 connects to side wing 3| adjacent its inner side and at the end opposite pivot 29.

A stop 38 on the adjacent end wall 8 of the rotary bowl unit at a point approximately opposite the door 28 is adapted to be engaged by a corresponding stop 39 on the sprocket 32, whereb to limit rotative movement of said sprocket rela- :tive to the bowl in the direction shown by the arrow in Fig. 3.

The sprockets 32 are arranged to be simultaneously driven, and in either direction selectively, by the following arrangement:

Endless chains 4!} connect between said sprockets and relatively smaller drive sprockets 4| on cross shaft I2; said chains remaining under proper driving tension regardless of the vertical adjustment of the bowl I, for the reason that the path of movement of the cross shaft 9 is concentric to the axis of cross shaft I2. The cross shaft 82 is driven through the medium of a power transmission unit, indicated generally at 42, from an engine 43 supported by the frame I at its rear end, and which engine and power transmission unit may be suitably housed. The power transmission unit 42 includes a change-speed transmission 44 and a, reversing gear unit 45, each of which is provided with a suitable control lever -which may be actuated from the tractor by remote control means (not shown).

When the rotary bowl unit is in lowered position adjacent the ground for digging and loading, its rotative movement in a clockwise direction is limited by means of dogs 46 on the bowl which strike upwardly unyielding cooperating stops 4'! from below, said stops 47 being pivotally mounted on a cross member 48 of the main frame for spring-returned downward yielding movement upon engagement of the stops 46 therewith from above, so as not to limit counter-clockwise rotation of the bowl when the same is in lowered position.

In operation, and to open the door assembly from the closed position shown in Fig. 5 to the 4B. .engage-the stops 4*1 from beneath thelatter:

soas to limit clockwise movement of the" bowl. The sprockets; 32-. are then driven in the directionshown by the arrow in Fig. 3-, whichcauses the elbow link 3 3z-to swing radially away-from the crossshaft 9- and to force the door 28 to its open on tangential. position. When door 2 8* is fully:

open elbow links- 33- abut against steps 49 on side- Wings 31, and cooperating stops 38-and 39:01} the bowl and sprockets are likewise engaged. As. the

door. 28 moves to such open position the flexible link: 34 191111 on the bellcrank 26 and causes it to swing. about shaft 9 in a direction which opens the=slidingqdoor 2 11 With the assembly of doors 2'4" and 28' thus opened, as shown in Fig. 3, and. with the rotary bewl-unitlowered so that stops 4'6. engage stops from: beneath, the implement is ready for a digging and loading operation. With advance of the implement, the blade 30! digsibelow the ground surface and the loosen-ed: material flows over the openv door- 23-, which then is serving as aloading apron, andpasses into the rotary bowl'unit.

When thebowl l is in loading position thelower pcrtion of thelperforate or foraminous side wall 23-is at the rear of the bowl and below the axis thereof. Tol prevent loss of material through thls-perforatelower portion o-fside wall 23 duringjthe: loading operation, a symmetrical, material retaininga skirt 5!) extends outside said wall portionin? spaced, facing relation thereto; said skirt being losed with the bowl at the ends, as at- 5|; and at. the lower edge of said skirt, as at 5-2. The space" between the upper edge 530i the skirtand the wall 23 remains open to permit discharge of material from said skirt upon: rotation of the bowl.

Whenrthe bowl is loaded the sprockets 32 are rotated inthe direction shown by the arrow in Fig. 4, which: causes the door assembly to close, by reason/of the fact-that elbow link draws the door 281 to closed? position, while theadjacent edgesioi sidewings 3'l engage the cam faces 36 o'nbellcranklegs 2? to push the bellcrank 2G in a: rotary direction. to. close the door 24.

Thebowl is then raised to a carrying position,

andfin which position the stops t6 will miss the sprockets are driven to cause rotation of the-bowl in acoun-ter-clockwisedirection, such drive being through the elbow links 33 to the bowl unit. As the bowl so-rotates, the material from the bowl is screened through the foraminous side wall 23' and thus discharged from the implements.

example of a use to which the above describedimplement'may be put is placer mining, wherein the placer material is dug by the rotary bowl unit when open, and then transported to a -recovery plant in the bowl as closed. At'the plant the implement is run over a receiving hopper and the bowl then rotates to screen out and discharge the srnallermaterial and fines which drop into-such hopper. This screening is facilitated by introduction of water into the (bowl through the tubular shaft 9 which is perforate within the bowl, as at54, and is formed at one,

the bowl is discharged at a diffierent pointtby openingthe: door assembly andthen rotating the: .bowlwclock'wise'while the latter is. raised, such large material then: fallingv through the door opening.

Another example of a use. for the described implement is road construction wherein digging,- hauling, washing, mixing, screening and distribution of gravel can be accomplished with the single implement..

.InIFig. 6 the bowl'is: shown: in the position-- towhich it may -vbev-set for loading. by a separate implement, and. in which position the loading opening 221 opens generally upwardly. To obitain this position or thebowl the same is lowered and stops 41 are engaged from beneath: cooperating stops. 56 on the bowl in circumferentially spaced". relation from stops 46 and in the: direction opposite door 23;. bowl against clockwise rotation, andthe sprock'ets 322 are. then rotated: in such direction toopen the doors Hand 28 forloading: oi the bowl from above.-

Whileirr the: present scraper type embodiment n0n adjustab1e vertically, in which case thebowl would be loaded solely from above.

From-the: foregoing description it will be readily seen that I have produced sucha device sub-- stantially fulfills the. objects of the invention. as setf orthherein.-

While this specification sets forth in detail.

the present and'preierred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having: thus described my invention, what I claimas new and useful and desire tosecure by Letters-Patent is:

1 A rotary bowl unit for an earthhandlingimplement, comprisin driven, rotary bowlhaving a loading opening in one portion -01? the circumferential-wall thereof, anotherportion of the circumferential wall of the bowl-being forami-nous, a door assembly mounted on the bowl adapted to close said-opening, and a material retainingskirt extending outside saidcircumferenti'al wall of the bowl in spaced facing relation to that part ofthe foraminous portion thereof which is lowermost whenthe bowl is in a predetermined loading position; there being closure means between the edges of said skirt and the bowl except at the one edge which is uppermostwhen the bowl is in said loading posi tion whereby upon subsequent rotation of the bowl; material passing through said foraminous portion onto said skirt is then discharged over said one edge.

2% A rotary bowl-unit for an earth handling implement, comprising a rotary bowl having aloading'opening on one side thereof, a door assembly mounted on the bowl for movement between openand closed positions relative to said opening, and'means to open and close said door assembly; the latter including a door movablefrom closed'to open position about an axis ex ten-ding immediately along the lower edge of said opening. when. the latter is in a predeternnned:

This holds: the

loading position, and an earth cutting and "digging blade on the door along the edge thereof which is opposite said axis, the door opening means being operative to maintain said door in rigid open position, whereby with the forward movement of the implement the digging blade will dig material which will be forced over the door and directly into the drum through saidopening.

3. A rotary bowl unit for an earth handling implement, comprising a rotary bowl having a loading opening on one side thereof, a door assembly mounted on the bowl for movement between open and closed positions relative to said opening, and means to open and close said door assembly; the latter including a door movable from closed to open position about an axis ex tending immediately along the lower edge of said opening when the latter is in a predetermined loading position, and an earth cutting and digging blade on the door along the edge thereof which is opposite said axis, the door opening means being operative to maintain said door in rigid open position, and said door when open being disposed substantially tangential to the bowl.

4. An earth handling implement comprising a frame supported above and for movement along the ground, a rotary bowl disposed with its axis transversely of the direction of travel, means mounting the bowl on the frame for vertical adjustment between raised and lowered positions, means to limit rotation of the bowl in one direction when said bowl is in lowered position, the bowl having a loading opening in one side thereof, a door assembly mounted on the bowl for movement to open or close said opening, a reversible power unit, and actuating means connecting the power unit with said door assembly and bowl; said actuating means being operative, when the bowl is in lowered position and the power unit is driven in a given direction, to initially cause closing of the door assembly.

5. An earth handling implement comprising a frame supported above and for movement along the ground, a rotary bowl disposed with its axis transversely of the direction of travel, means mounting the bowl on the frame for vertical adjustment between raised and lowered positions, means to limit rotation of the bowl in one direction when said bowl is in lowered position, the bowl having a loading opening in one side thereof, a door assembly mounted on the bowl for movement to open or close said opening, a reversible power unit, and actuating means connecting the power unit with said door assembly and bowl; said actuating means being operative, when the bowl is in lowered position and the power unit is driven in a given direction, to initially cause closing of the door assembly, and said means being operative upon movement of the bowl to raised position and continued drive of the power unit in the same direction, to then cause rotation of the bowl in said one direction.

6. An earth handling implement comprising a frame supported above and for movement along the ground, a rotary bowl disposed with its axis transversely of the direction of travel, an axial shaft supporting the bowl and projecting beyond the ends thereof, means supporting said shaft at said ends from the frame, the bowl havin a loading opening in one side thereof, a door assembly including in circumferential relation a sliding door adapted to close one portion of the opening, and an outwardly swingable door H adapted to close another portion of the opening,

said swingable door being pivotally mounted on a transverse axis adjacent the edge of the bowl opposite that portion closed by the sliding door, a bellcrank journaled on the shaft at one end of the bowl, one leg of said bellcrank being fixed to the sliding door at one end, the other leg of the bellcrank projecting generally toward the swinging door, a side wing on the adjacent end of the swinging door projectin generally radially inwardly toward said other leg of the bellcrank, the side wing being adapted to engage said other leg of the bellcrank to cause swinging of the latter in a direction to close the sliding door upon closing of the swinging door, a flexible link connected between the wing and said other leg of the bellcrank to pull the latter in a direction to open the sliding door upon opening of the swinging door, a sprocket on the shaft at said one end of the bowl, means to drive said sprocket in either direction selectively, and means between the sprocket and said win to open and close the swinging door upon rotation of the sprocket in corresponding directions.

'7. An earth handling implement comprising a frame supported above and for movement along the ground, a rotary bowl disposed with its axis transversely of the direction of travel, an axial shaft supporting the bowl and projecting beyond the ends thereof, means supporting said shaft at said ends from the frame, the bowl having a loading opening in one side thereof, a door assembly including in circumferential relation a sliding door adapted to close one portion of the opening and an outwardly swingable door adapted to close another portion of the opening, said swingable door being pivotally mounted on a transverse axis adjacent the edge of the bowl opposite that portion closed by the sliding door, a bellcrank journaled on the shaft at one end of the bowl, one leg of said bellcrank being fixed to the sliding door at one end, the other leg of the bellcrank projecting generally toward the swinging door, a side wing on the adjacent end of the swinging door projecting generally radially inwardly toward said other leg of the bellcrank, the side wing being adapted to engage said other leg of the bellcrank to cause swinging of the latter in a direction to close the sliding door upon closing of the swinging door, a flexible link connected between the wing and said other leg of the bellcrank to pull the latter in a direction to open the sliding door upon opening of the swinging door, a sprocket on the shaft at said one end of the bowl, means to drive said sprocket in either direction selectively, and an elbow link pivotally connected between an eccentric point on the sprocket and a point on the side wing so that upon rotation of the sprocket in one direction to open the swinging door, and upon reverse rotation of the sprocket to close the swing door; said elbow link extending away from the shaft, and when the door assembly is closed being dis posed with the elbow adjacent thereto and with said pivot points beyond dead-center relative to the shaft axis.

8.- An implementas in claim 6 in which the shaft is vertically adjustable to move the bowl between raised and lowered positions, means to limit rotation of the bowl in one direction when the bowl is lowered, the loading opening then being at the front of the bowl; said swinging door when open projecting forwardly from the lowermost side of the'loading opening, and an earth cutting and digging blade onthe side .of said door which is foremost whenithe door is open.

9. An implement as in claim 6 including a driven cross shaft on the "frame in spaced re'la- "tion to the bowl lengthwise of the implement, a sprocket onfsa'id driven cross shaft, an endless chain extending between the sprocket, on the driven cross shaft and the sprocket in the bowl supporting shaft;"the supporting means for said bowl supporting shaft being arranged to adjust said shaft up or down in an arcuate path concentric to said driven cross shaft.

1.An earth handling implement comprising a wheel supported frame, a rotary bowl mounted 'on the frame with the bowl axis eXten'dingtransversely, a loading opening on one side .of the bowl, "another side of the bowl being foraminous. a closure means for said opening including a closure means pivoted on thebowl for swinging movement lengthwise of the implement, an earth cutting and digging blade on thatedge of such pivoted door which is outermostwhen the door is "open, means operative to upon said door with the loading-opening facing forwardly and with said'blade projectin forwardly for ground engagement, or to open said door with the loading opening facing upwardly :for loading of'said pivoted bowl by a separate implement, "means to prevent rotation of the bowl by the thrust of said blade when said pivoted door is open and the blade is in ground engagement, and means to rotate said bowl when the door is closed.

11. A traveling material handling implement including a supporting frame, a drum rotatahly mounted in the frame, meanst'oraise andiower the drum relative to the frame, means to hold the drum against clockwise rotation when in lowered position, the diu-mhaving a load receivin opening, a closure means for said opening including a pivoted door normally closing at least a portion of said opening, and means for swinging said door on its pivot to ground engaging position-when the drum is lowered and held against clockwise rotation, whereby with forward movement of the implement material may then be scraped and delivered through the opening into the bowl.

12. A *device asin claim 11 in which the door opening means is also operable to close the door and thereafter rotate the drumcounterclockwise.

A device as in claim 11 in which-the door opening mean is also operable to close the 'door and thereafter rotate the drum counter-clockwise, at least a portion of the Wall of said drumibeing foraminous whereby-to screen material from the drum therethrough during such counter-clockwise rotation ofth'e Idrum.

1'4. Ina material handlingfimplement, afframe, a drum rotatably mounted l the frame and provided with. a load reoeiving opening, closure means for said opening including a pivoted door-normally closing at least a portion of said opening, a gear rotatab ly mounted substantially co-axially of the drum, a bell crank connecting the gear and said pivoted door so that when the gear is rotated in one direction the door will be swung open and when the gear is rotated in the opposite direction the door will be closed, and co -acting stops on the gear and drum respectively adapted to engage and cause rotation of the drum upon rotation of the gear in a door opening direction and after the door is open, and means to drive the gear.

15. A travelling material handling implement 75 a including a frame supported tor movement along the .ground a power unit mounted on the frame, a rotatable drum isupporteddby theirame, said drum having-an opening through which material maybe loaded into the drum, a closure means :for the opening including a door one edge of which is pivoted directly to one edge of the opening, means to swing said door fromoa olosed position over a portion of said opening to a position extending outwardlyfrom said one edge of .the opening, such means comprising :a rotatable element separate from the door, means-to drive the element fromthe power-unit and :a bell crank :connection between the element 'and door.

16. Atravelling material handling implement including a frame supported tor movement along the ground,-a power unit mounted on theframe, a rotatabledrum supported bythe frame, :said drum having an opening through which material may be loaded into the drum, -a closure means for said -.openlng including a door onebedge of which is pivoted to one edge of the opening, a rotatable .gear mounted in driving relation with said power unit, .and -,a bell crank connection between the .gearviand door whereby through operation of the gear :the door maysbe swung on its pivot irom closed position over a ,portion of .the opening to an outwardlyprojecting positionclearof the opening, and viceversa.

17. vA combination as in claim 15in which the outer edge of the .door forms a scraping edge operable when the ,door is in said outwardly extendin position to engage theground and dig and scrape earth and. movel it over thedoor and directly into the drum with-the forward movement-of the implement,

18. A material handlin implement including adrum' to receive a load o'f material, such having .a load receiving opening, a .door assemblyn'ormally closing said opening, suchasse'mbly including a sliding .door and -a pivoted door, and means to simultaneously swing the pivoted door and slide the sliding vdoor, said-latter means including a pivoted bell crank having one leg connected with the sliding door, and a tension member connected between the pivoted (1001' and the other leg of the bell crank whereby when the'pivoted door swings open it will .pull the slidingdoor open, and means to turn "the pivoted door .on its axis.

19. 'A material handling implement including a :drum to receive .a load of material, such drum having a load receiving opening, a door assembly normally closing said opening, .suchassembly in eluding a sliding "door and a pivoted do0r,a:nd means to simultaneously swing thepivotedldoor and s'li'dethe sliding door, latter means including a pivoted bell crank "having one leg "connected with the sliding door, and a tension member connected between the pivoted "door and the "other leg of the bell 'crarlk whereby when thepivoted-door swings open it will "pull the sliding door open, 'means to turn the pivoted door on its axis, and means on the pivoted door to engage such other leg of the bell crank as the pivoted door swings to closed position and thereby slide the sliding door to closed position.

20. A travelling material handling element including a frame supported for movement along the ground, a rotatable drum supported by the frame, said drum having an opening through which material may be loaded into the drum, a door assembly for said opening, such assembly comprising a first arcuate shaped door arranged to slide circumferentially over a portion of said opening to respectively close or open the same, a second door, said second door being substantially flat and hinged at one edge directly along one edge of the drum openin and operable to close the balance of the opening or to be extended outwardly from said one edge of the drum, and means to simultaneously swing the second door and slide the first door.

21. A travelling material handling implement including a frame supported for movement along the ground, said frame comprising spaced side walls provided With alined substantially vertically disposed slots, a drum having an axially disposed shaft mounted for guided movement through said slots, means to raise and lower said shaft in said slots whereby to raise or lower the drum, means for scraping and loading material into the drum when the latter is in lowered position and the implement moves forward, and means to rotate the drum when it is in raised position, the walls of the drum being at least in part foraminous whereby upon rotation of the drum material will be screened therethrough.

22. A travelling material handling implement including a frame supported for movement along the ground, said frame comprising spaced side walls provided with alined substantially vertically disposed slots, a drum having an axially disposed shaft mounted for guided movement through said slots, means to raise and lower said shaft in said slots whereby to raise or lower the drum, means for scraping and loading material into the drum when the latter is in lowered position and the implement moves forward, and means to rotate the drum when it is in raised position, said scraping and loading means including a door controlled opening in the drum, the door being normally open when the drum is in lowered position and normally closed when the drum is in said raised position, and means whereby when the drumis in said latter position and rotated clockwise the door will be opened and the contents of the drum discharged therefrom,

23. Atravelling material handling implement including a frame supported for movement along the ground, said frame comprising spaced side walls provided with alined substantially vertically disposed slots, a drum having an axially disposed shaft mounted for guided movement through said slots, means to raise and lower said shaft in said slots whereby to raise or lower the drum, means for scraping and loading material into the drum when the latter is in lowered position and the implement moves forward, and mean to rotate the drum when it is in raised position, said scraping and loading means including an opening provided in the drum, a closure means for said opening including a door hinged along one edge thereof directly to one edge of the opening, means to close the door at least a portion of over the opening when the drum is in raised position or to extend the door outwardly from said opening when the drum is in lowered position, means to hold the drum against clockwise rotation when in said latter position, the door then being operable to scrape material which will be forced into the drum through said opening with the forward movement of the implement.

24. In a material handling implement, a frame, a drum mounted for rotation in the frame, means to move the drum vertically relative to the frame, means to move the drum rearwardly relative to the frame when said drum is moved downwardly, a yieldable stop on the frame, a stop on the drum positioned to engage and pass the yieldable stop as the drum moves downwardly and rearwardly, the stops then engaging each other to prevent rotation of the drum in one direction, and means whereby material may be loaded into the drum when it is in lowered position.

25. In a material handling implement, a frame comprising spaced side walls provided with alined substantially vertically disposed slots, a shaft mounted for movement through said slots, a drum mounted on the shaft, a bell crank journaled on the frame, one arm of the bell crank being slidably connected with the shaft, and means connected with the other end of the bell crank for moving the bell crank on its axis Whereby to selectively raise or lower the drum, means whereby material may be loaded into the drum, a gear mounted for rotation On the shaft, a second shaft mounted in the frame, the slots being arcuate in shape and disposed concentric with the axis of said second shaft, a gear fixed on said second shaft, the two gears being connected in driving relation with each other, means to drive the second shaft, and means to selectively place the gear on the first shaft in driving relation with the drum to rotate said drum either clockwise or counter-clockwise.

LAURENCE L. RECKLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Switzerland Mar. 1, 1918 Number Number