US2458949A - Load carrier mounting - Google Patents

Description

LE GRAND H. LULL LOAD CARRIER MOUNTING Jan. 11, 1949.

5 Sheets-Sheet 1 Filed Nov. 9, 1945 FIE 2 Zjvwwwbcw LE GRAND H. LULL Jam. 11, 1949.

LE} GRAND H. LULL LOAD CARRIER MOUNTING Filed Nov. 9, 1945 '5 Sheets-Sheet? LE GRAND. Luu.

Jan. 11, 1949. LE GRAND H. LULL LOAD CARRIER moum'ine 5 Sheets-Sheet 3 Filed Nov. 9, 1945 LE GRAND H. Luu.

as U 24 W W j Patented Jan. 11, 1949 hairs!) STATES PATENT OFFICE r 2,458,949 LoAn CARRIER MOUNTING Le omnan-Lnu, Minneapolis, Minn. I Application November 9, 1945, Serial N6. 627,694 en n's (01. 214-113) This invention relates to improvements in load handling devices or loaders, which are supported on and operated by an automotive vehicle such as a tractor. n

The present invention more particularly relates to certain improvements in the type of loader shown in my co-pending application, Serial No. 515,783, filed December 27, 1943, now United States Patent No. 2,394,458, issued Feb. 5, 1946. This loader comprises an upright extensible tower or frame mounted upon a tractor and operated by a hydraulic cylinder, or cylinders, and an arrangement of cables to raise and lower a carrier member upon which the actual load carrier, such as a material bucket or the like is detachably mounted. It is found to be very desirable to tilt the bucket or other carrier as it is lifted in order to prevent the material from running out or falling oif and it is in connection with such tilting and associated features that my present inven- 1 tion is chiefly concerned.

The primary object of the invention is to provide a mechanism by which the bucket or load carrier may be-tilted to a degree or anglegreater than possible in any previous construction and to such extent that the material will not fall out as it is lifted and transported from place to place. Another object is to provide a bucket tiltingmechanism which is completely automatic in its operation, is fully adjustable as required both to initially determine the tilt angle and to maintain it as wear occurs and which embodies means for holding the bucket level, or substantially so, when it is lowered and is being thrust into a load. .A further object is to provide bucket latching means of novel and advantageous construction for unlatching the bucket to dump its contents from its elevated and tilted positions, and which latch mechanism is so arranged as to, be undisturbed by tilting of the bucket so that thebucket will under no circumstances be accidentallyunlatched.

' These and other more detailedand specific objects will be disclosed in the course of the following specification, referencebeing had to the accompanying drawings, in which- Fig. 1 is a side elevation, partially broken away andin vertical section showing one form of my present invention, and showing the bucket" in dumping position. n

Fig. 2 is a partial plan view of the load carrier assembly shown in Fig. 1, with certain parts of the loader tower or frame .shown in horizontal section.

Fig. 3 is a side elevation similar to Fig..1 but showing the bucket in its tilted transportv position.

frame 2| comprising side plates 22 slidably sup- Fig. 4 is an enlarged fragmentary detail vertical sectional view taken substantially along the line 3--4 in Fig. 2.

Fig. 5 is a front elevation, showing the carrier mechanism in section along the line 5-5 in Fig. 1.

Fig. 6 is an enlarged fragmentary detail sectional viewalong the line 6-6 in Fig. 4.

Fig. is a plan view of a modified form of car-. rier mounting, a part of the bucket'and other parts of the structure being broken away.

Fig. 8 is a vertical sectional view along the line 3-8 inFig.7. I, v

Fig. 9 is a similar view along theline 9-9 in Fig. 7, but showing the bucket in tilted position.

Fig. 10 is a fragmentary detail sectional view illustrating the operation.

The loader itself will be first described and it is, of course, understood that this loader is identical in all essential respects to that shown in my previously identified. prior application and only suchparts thereof as essential to an understanding of my present invention will be described herein.

Referring now more particularly and by reference characters to thedrawing, the loader comprises an upright tower I I supported at the front I end of a tractor I2 or other suitable automotive vehicle. The tower I I comprises an inner rigidly supported frame I3 and an outer vertically movable frame I4 the sides of which are slidablewith respect to the corresponding sides .of the inner frame. The outer frame I4 is raised and lowered bymeans of cables Iisecured at I6 to the inner frame, trained over pulleys IT .on plungers I 8, and secured at their other ends I9,to the lower end of the outer frame. The plungers I8 are, vertically positioned by hydraulic fluid pressure-in cylinders 20 supported in the inner frame It and it will be readily evident that upward movement of the plungers will elevate the outer frame I4, and vice versa. Fluid under pressure is supplied to the cylinders 20 by a suitable pump and control system (not shown) powered by the tractor engine and under control of. the operator.

The loader assembly further includes a carrier ported alongside the sides of the outer tower frame I4 for up and down movements both with, and with respect thereto. These side plates 22 are rigidly joined by upper and lower cross bars 23 and 24 having forwardly turned flanges apertured near their ends to receive. vertical andremovable fasteningpins 25. The carrier frameZIris raised and lowered, as the tower frame. l l'corresponm ingly moves, by means of cables 26 whichare such that. from a lowered collapsed position at which the frames 13 and M are at substantially 1 the same level and the carrier frame down 7 per edges of the side plates 49. be released by a trip rope 52 (Fig. 3) connected near the ground, the upward movement powered by the cylinderszll will both project the outer;

tower frame M upwardly and elevate the carrier frame to the top thereof so thatianverwhighlift will be obtained. At the same time, in the collapsed position the loader requires butcompa'ratively little head room.

The" cross bars 23" and 24 and-removable-pins 25" provideconvenient means for mounting'ordismounting any particular loadihandlingor carrying' device.- As here shown-thisdevice takes the form-of a" material bucket or scoop and for connecting this'buck'ea or 'other similar-device; to the carrierframe 1 21* I provide a' novel -mechanism'forming the-"subject matter of this invention;

This mechanism -as shown in Figs; 1 through 6; comprises'a first or mounting frame designated generally at 3i which is mounted on the carrier frame-2|; and a-seco'nd-or tiltingframe designatedrgenerally at 3 2 which' supports the bucket 30 andistiltably'supported'on said first framed i.

The first or mQunting'frame-SI comprises' rear upright angles or mounting members 33 which are-rigidly-' joinedby upper and lower cross bars 34"and35 adapted to'fit between the aforesaid cross bars 23 and 24 of the carrier frame 2i; These cross bars 34 and '35" are also apertured to pass the-pins 25 and it will'be apparent that the frame 3! may thus be readily attached to or detached from theloaderz The frame 31 further com'prises transversely spaced-aridforwardly projecting side plates 36 the-rear edges ofwhich are outwardlyturn'ed" at 31 to fit? the outwardly turned webs ofthe angles 33; Bolts-38 connect these parts'andbetween them aremountediaseries of 'shims 39: Bydncreasing or. decreasing the number "of these shims liflt the-i plates 36 and all parts attached thereto" may be moved forwardly or."rearwardlyv with: respect to. the outer tower frame M. The. purpose of .suchadjustment will be later'pointed'out.

The second or" tilting; frame 32: comprises side plates 40! which" are: pivotally' mounted by pins or bolts: diet upper medial points toupper forward: corners of the side platesat'ihl The side plates; 40 are I locatedinwardly of, and. parallel to, the side-plates 3B and project" at lower corner portionss'forwardly' ofithe'plates alongside the bucket 30': These forward"portionsof" the side plates are pivotallya'attach'edt at'4Q to opposite sides: ofithezbucket Sillandzthese: pivots; 42 are so located: that". the bucket will'zln'orma'llypf "its own weighttilt'forwardly aml'downwan'dly 'to'a dumptingi'positi'on" (Fig: 1'); Snchgdumping movement is llIIlllIBd" by. stops: one of whicl'i't is shown. at i 43 andzwhich' contact. the r lower edges" of :the plates 4fli-aasw-illzberclearlyapparentzg l To: normally hold: the; bucket; Ella, against such dumping moyements-l provide latchesidfiesecured near-r oppositeends: of a latch: shaft: 45:: 'WhiChlS journaled transversely-l betweem anew-through I brackets 46 welded or otherwise suitably secured to the side plates 49. The latches are further so positioned that the project forwardly alongside upper lateral corners of the bucket, when it is in normal position, and these forward ends of the latches releasably engage latch pins 4'! laterally projecting from the bucket. The latches 44 are notched at 48 for this purpose and they are normally, urged upwardly to maintain engagemerit urithfithe pins by spn'ngs 49 stretched between arms 50 on the latches and lugs 5! on up- The latches may to'ii ram arm'53 on the latch shaft 45 and a pull .onithis. rope will swing the latches down to clear thepins and allow the bucket to tilt forwardly totdumpingq-positionz On restoring the bucket to normaliposition the pins ll ride up on nose surfaces 54on the latches to depress them as necessary for reengaging the pins and the latches are-held'in properposition for this camming action -by stops55 1ocatedin the path of the arms The rear ends of the side plates 4! extend to- Ward-but terminate some distance forwardly of the forward sides of the movable fame i l, and these ends are rigidly joined by a cross member in the iormbfa tube 58 welded or otherwise secured to the'plates and rigidly trussed as indioatedat 5-72 The rearends of'the side plates 43, and of course'the tube 56- are normally pulled upwardly about: the pivots 4! by a strong retractile-coilspring Bil-located above the upper cross-bai 34. One end of this spring 58 is adjustab'ly attached by an eye bolt 59 (Fig. 5) to a bracke-Ffill'uponthe cross bar 3 1 while the other end-ofthe spring is hooked at iii to the lower arm of a bell crank 62 pivotally mounted at 63 upon a--bracket64 also secured to said cross bar. A link 65 is'connect'ed at 66 to the other arm of the bell crank 62 and depends therefrom at its lower'end forwardly of the tube 56 to a hook 87 secured tothe tube and upon which the link is hooked. The spring 58' thus tends to so swing the bell crank '62 as to pull'the link 65 upwardly and this motion is transmitted to the tube 56 and plates '40 to elevate their rear ends, and of course tends to lower-the bucketpivots 42. Such spring biased movement of the-parts is limited by stop screws lili which depend from the upper cross bar'fl into the path of? the tube 56 and these screws are adjustableras clearly indicated'in Fig. 4'at fi9=soi=thattthe normal level of the parts, including bucket 30, may be readily adjusted.

As initheiloader 'shownin my prior application the movablertoweriframe has upright guide bars 101 or means-forming: upright guide surfaces, on each forward surface and these bars are tapered offw'or'rearwardly-and downwardly angled at lower ends'asi indicated at H. Above these ends the forwardsurfacesofv the bars ill project forwardly some distance-from the sides of the frame I 4. Cooperating with said guide bars are rollers 12 which are arrangedrea-rwardly of the tube 56 and supported-therefrom by rigidly afiixed bearing brackets'l'3; The rollers 72 are so spaced thata'they 'willcontact the guide bars '50 as the carriers-frame 2lmoves upwardly, the bars terminating at such height above the lower ends of the frame Hl that the rollers will only reach thebars after-the bucket has been elevated some distancesabove'fits lowermost loading position.

In its normal or leading position the bucket 30 standmwith'.itszrearupper corner portions immediatelyforward: ofa stop. screws 74- adjustably Means mounted in lugs I rigidly secured to the brackets 45. Said screws extend forwardly from the brackets and in position to engage the rear of the bucket and prevent it from tilting back as might otherwise occur when the bucket is being thrust into a load or pile of material.

In operation as the carrier frame 2i is elevated to a certain point the rollers 12 will contact the angular lower ends ll of the guide bars I0. It being understood that prior to this time the rollers I2 just clear the forward surfaces of the frame I4 it will then be apparent that the rollers in contacting the ends 1| will be forced to roll up over and along the forward edges of the bars I0 as the carrier continues to rise, and in doing so the rollers will of necessity be moved both downwardly and forwardly. This motion, transmitted through the brackets I3 and tube 56 to the rear ends of the side plates tilts the entire frame 32 downwardly to a considerable degree at its rear end. As a result the forward ends of the side plates 40, carrying the bucket pivots 42 are forced upwardly and forwardly tilting the bucket 30 upwardly at its forward edge so that material therein will not spill over this edge as it is raised and transported from place to place. It will be noted that the latch mechanism for the bracket is in no way disturbed by this tilting action and that the bucket may be unlatched for dumping its contents at any time. The bucket, of course, returns to normal level position when it is lowcred and the rollers I2 move downwardly off the guide bars III, the spring 58 bringing this about, and the whole action is entirely automatic.

Varying the number and thickness of the shims 39 has the effect of moving the rollers I2 forwardly or rearwardly both to initially determine the degree to which the bucket is tilted to compensate for the effects of wear after long use.

The action of the guide bars I0 in forcing the if-lio rollers I2 both downwardly and forwardly, together with the effective leverages between the rollers and the pivot points 4I and 42 results in the bucket being tilted to quite a sharp angle as compared to the tilt possible in the mechanism of my prior application, and this added tilt is found to be of considerable advantage in preventing spillage of loose material from the bucket.

The mechanism shown in Figs. 7-10 is similar to that just described but is possibly more satisfactory in a heavy duty loader. The loader itself remains the same and such parts thereof as appear in these views are given the same reference characters, while the bucket', differing only as to size, is again designated at '30. The guide bars 10 and angular lower ends II; are also identical and are so indicated.

Like the first described construction this modification includes a first or mounting frame, here indicated generally at IS, and a fsecond or tilting frame indicated at H. Said first frame'comprises rear upright angles or mounting-members I8 rigidly joined by upper and lower cross bars I9 and 80 adapted to be positioned between the cross bars 23 and 24 of the carrier frame 2i and removably attached thereto "by the pins 25. The frame "I6 further comprises forwardly extending parallel side plates Ill and at rear ends these are outwardly flanged andsecured by bolts 82 to the angles I8. Shims 83 are again provideo. and for exactly the same purpose.

The tilting frame 11 includes side bars '01' plates 84 located inwardly of parallel to the sideplates 8| and, as in thej'p'revious constructiomthese plates 84 are pivotally attached, as by 6 pin's'or bolts 85, to the forward upward corners ofthe side plates of the mounting frame. And herealso tilting of the frame TI is causedto tilt the bucket 30 but in this case the bucket is pivotally attached at 86 to lower forward corners of the side plates 8|. This pivot is, however, as in the first modification of my invention, located forwardly of and below the pivot connection between the two frames and is so located with respect to the center of gravity of the bucket that it will normally and of its own weight tilt toward dumping position.

The rear ends of the side plates 84 terminate forwardly of the movable tower frame I4 some distance and they are rigidly joined by a trussed cross member or tube 81 from which rearwardly extend bearing brackets 88 carrying rollers 89 in position to engage the guide bars Ill. The rear ends of the side plates 84 are also upwardly biased, until such motion is limited by stop screws 90 carried by the upper cross bar I9 as previously described, by a strong coil spring SI again arranged above the said cross bar I9 and attached at one end to a bracket 92 and at its other end to a bell crank 93 carried by another bracket 94. A link 95 connects the bell crank 93 to the tube 81 to pull the same upwardly and. when the tube is against the stop 90 it is, of course, understood that the 'bucket30 is held substantially level as it is shown in Fig. 8.

Bucket latch mechanism is arranged between the frame I1 and the bucket and comprises brackets 96 secured to upper edges of the side plates 84 rearwardly of the bucket and supporting a transversely journaled shaft 91. Latches 98 are secured to this'shaft 91 and depend downwardly and forwardly therefrom to points adjacent transversely positioned latch pins 99 secured by brackets I00 to the rear of the bucket. The latches 98 are forwardly and downwardly notched, as at I0l, to-engage over the pins 99 and when so engaged will obviously hold the bucket from dumping while looking it to the tilting frame TI. The latches are normally urged forwardly at lower ends to maintain and returnto latching engagement with the pins 99 by springs I02 stretched between arms I03, affixed to the ends of the shaft 91, and lugs I 04 upon the upper edges of the side plates 84.

Between the brackets 96 a sleeve I05 is journaled upon the shaft 91 and this sleeve is provided with a lever arm I08 to which the trip rope (not shown) is attached, the arm extending rearwardly as clearly shown. The weight of the arm I06 tends to cause the sleeve I05 to turn counterclockwise upon the shaft as it is viewed in the drawing and this action tends to normally are reduced in width to form fingers I I I v which normally stand immediately behind the inside of the latches.

The foregoing arrangement is such that oscillation of the sleeve I05 by a pull on the trip rope will swing the upper togglearms I0'I rearpins 99 wardly at their lower ends imparting to the fingers III an opposite forward movement.

The fingers in so moving crowd the latches 98 out of engagement with the pins 99 to allow the bucket tordump sand the leverage obtained by the toggle action is such .as to release the latches against .thel'relatively tremendous loadof a large bucket, without -difficulty.

To prevent the bucket from tilting backward :at its upper rear edge when being thrust into a mile I again provide stop .means in this case comprising swingablestop arms Hdpivoted at H3 at rear ends to brackets 414 secured atop the upper cross bar '59. The arms H2 normally .exztend :forwardly from these pivots "to points immediately behind the upper rearcorner portions of the bucket (Fig. 8) and carry adjustable rstop :screws ii to to contact the bucket :and prevent its :sotilting. Angles H6 are secured to-the bucket 'and have rearward-ly overhangingwebs -l H which will :prevent the stop arm 1 1'2 from kicking up at forward ends. I 1

.The arms H2 are held up in position when the 'bucket is level by operating screws-or dogs M8 attached by brackets H9 to the tube 81 in position to upwardly engage the arms forwardly :of'theirpivots 1 !3. In order to allow the'bucket tilt to transport position {as in Fig. 9-the .stop arms M2 must obviously swing downwardly to clear and this 'they "do since, as the bucket is tilted, the :tube 81 moves downwardly :and the dogs 1 [8 allow 'the arms to reach almost a verztically hanging position. When the bucket is again leveled the dogs will, of :course, reengage the stop arms :and :restore them to the position :oflFig. 8.

The operation of this mechanism is similar to "that previously "set .out audit will be appar- -ent that, as the carrier rises the engagement ofthe rollers-S9 with the guide bars 10 will-swing the "rear 'ends of the side plates "84 downwardly. This .motion is transmitted through 'the latches :98 to the bucket T30 along lines eccentric "to the pivots :86 so that the'bucket is tilted sharply :up- :ward at its-forward edge as seen in Fig. 9. .As the carrier descends the bucket will of course ibe leveled again by action of the spring 9!.

.It :is understood that suitable modifications may be made in the structure :as disclosedprowided such modifications come within the :spirit candscopezof the appended claims.

Having now therefore fully illustrated and described my invention, .what .I claim :to be new and desire to protect by Letters Patent is:

1. In a :loader having an upright :guide .-:surface and a carrier fframe movable upwardly and downwardly with respect thereto, a first frame .:rigidly supported by said carrier frame, a second comprising side :Plates -.connect.edby across member. a. bucket :tiltably supported with respect to said second frame, and means located between said across member and the pivotal connection between :the ,first and second frames and normally locking the bucket to said second frame for tilting-movements therewith. i

4. In a loaderhaving an upright guide member, '23; first'frame non-tiltably supported for up and down movements along said guide member, a :second .frame tiltably supported on the first .frameiand ihavingside portions connected ;by a rigidly mountedcross member, means carried by :saidlcross :member for engagement with the said guide member to tilt the second frame as the irames move up and down, and a load carrying device connected to and tiltable with said second frame. i

:5. In a loaderhaving an upright loader frame "and a guide member on a forward side thereof, a {carrier -.frame movable upwardly and downwardly along-said-loader frame, a first frame supported from said carrier frame, a second :frame vpivotally supported on the first frame :at a point forwardly of the-loader and carrier frames, means carried by the rear .end. of the second framefor engaging said guide member to tilt the frame, a load carrier :device connected to and tiltablewith said-second "frame, and said engaging means being spaced vrearwardly in a substantially horizontal plane. from -the pivot connection between the said first and second frames. i

6. In :a;,-loader' having .an upright loader frame and a guide member .on .a forward side :thereof, a carrier .frame movable upwardly and .downavardly along said loader frame, a first frame supported from said carrier frame, a second frame :pivotally supportedon the first frame-at =a point forwardly of the loader and carrier frames, rmeans carriedrby the rear end of the "second-frame for.=engaging said guidexmember'to tilt the frame,- a load carrier device 'pivotally supported for tilting movements'independently rotsaid second frame; latch .means normally lockiingsaid load carrier device to said .second'irame, .and said latch means being located rearwardly of the :pivot connection between said-firstuand second frames.

7.. Inaa loader of the character described ha-vinganupright guide member and a carrier movable wupwardly and downwardly with respect thereto, :a supporting and tilting mechanism for a 'loadrhandling'device comprising in combinaframe tiltably supported on said first frame :for ,tion, azfirst frame supported on said carrier, a

downward swinging movements at one end; :a :tubular cross member on said second :irame, :meansiparriedsby said cross memberforengagemerit 1 by said guide surf ace :as the :frames ,move upwardly and operative therebrtontilt saidsec- --ond .frame, and a .load carrier operatively con- :nected :to and tiltable with-said second'frame.

"2.:In a loader of the character described, :a ifirst frame supported for up and-down movements, a "second :frame pivotally supported :on the-ifirstiframe:for-tilting movements asrthe first .Lframe moves up and down,said second frame comprising side plates connected by a cross memiber and a bucket connected to and :tiltable with :said second fframe.

13. In ;a leader of the character described. -a first frame supported .for up and down move- 2111911135,.2n5'880l'1d frame ,pivotallyshDDOrted-on the first frame for tilting movements :gas :the afirst seccnd=frame vpivotally supported on thefirst frame and pivotally supporting the said device, means -.carried by the secondirame cooperating :with the guide member-to tilt the frame and load handling device as a unit,- and latch means located between-said means and the pivot connection between the first and-second frames for locking thezload-handling device .with respect to saidsecond frame. i

8. :In'a-loader having an upright frame,=a guide :rnemberon the forward side of the frame, and :a .materi-aL-bucket, mechanism -for supporting and tilting the bucket, comprising combination, .acarrierframemounted for up and down movements with respectto. said guide member, :a mountingirame (on the carrier frame, side plates pivoted ib'etween their ends to said .mounting -.fr.ame.; and having forward ends supportably connected-to thebucket, means rigidly normed;-

firame moves up and down, said-second :sframe T5 the tea'r-endszofithe side plates, and rollers carried by said connecting means and cooperating with the guide member to tilt the side plates and bucket.

9. In a loader having an upright frame, a guide member on the forward side of the frame, and a material bucket, mechanism for supporting and tilting the bucket, comprising in combination, a frame mounted for up and down movements with respect to said guide member, side plates pivoted between their ends to said frame and having forward ends supportably connected to the bucket, means carried by the rear ends of the side plates and cooperating with the said guide members to swing said rear ends downwardly as the bucket is raised, and spring means normally biasing the rear ends of said side plates in an upward direction.

10. In a loader having an upright frame, a uide member on the forward side of the frame,

and a material bucket, mechanism for supporting l and tilting the bucket, comprising in combina tion, a frame mounted for up and down movements with respect to said guide member, side plates pivoted between their ends to said frame and having forward ends supportably connected to the bucket, means carried by the rear ends of the side plates and cooperating with the said guide member to swing said rear ends downwardly as the bucket is raised to thereby tilt the bucket upwardly at its forward edge, and spring means carried by said movable frame and connected to the said side plates to normally and yieldably urge them in an upward direction.

11. In a loader having an upright frame, a guide member on the forward side of the frame, and a material bucket, mechanism for supporting and tilting the bucket, comprising in combination, a frame mounted for up and down movements with respect to said guide membeigside plates pivoted between their ends to said'frame and having their forward ends pivotally connected to the bucket, latch means carried by the side plates and normally locking the bucket against downward dumping movements at its forward edge, stop means preventing opposite swinging movements of the bucket with respect to the side plates, and means carried by the side plates for engaging the said guide member to tilt the side plates and bucket as a unit.

12. In a loader having an upright frame, a guide member on the forward side of the frame, and a material bucket, mechanism for supporting and tilting the bucket, comprising in combination, a frame mounted for up and down movements with respect to said guide member, side plates pivoted between their ends to said frame and having forward ends supportably connected to the bucket, means carried by the rear ends of the side plates and cooperating with the said guide members to swing said rear ends downwardly as the bucket is raised, and'spring means normally biasing the rear ends of said side plates in an upward direction, the said spring means including a bell crank biased in one direction by the spring and connected to said side plates.

13. In a loader having an upright frame, a guide member thereon, and a material bucket, mechanism for supporting the bucket comprising a mounting frame supported for up and down movements with respect to said upright frame,

side bars pivotally attached at forward ends to said mounting frame and having means at their rear ends cooperating with the guide member to swing the bars downwardly as the mounting frame moves upwardly, the said bucket being pivotally supported upon said mounting frame,

.and means connected between the said bars and the bucket for translating said downward movement of the bars to upward tilting movement of the forward edge of the bucket.

14. In a loader having an upright frame, a guide member thereon, and a material bucket, mechanism for supporting the bucket comprising a; mounting frame supported for up and down movements with respect to said upright frame, side bars pivotally attached at forward ends to said mounting frame and having means at their rear ends cooperating with the guide member to swing the bars downwardly as the mounting frame moves upwardly, the said bucket being pivot-ally supported upon said mounting frame, latch means normally engaging the bucket to prevent dumping movement thereof, and said latch means being normally connected betweenthe side bars and the bucket to tilt the bucketupwardly at its forward edge responsive to said downward movement of the side bars.

15. In a loader having an upright frame, a guide member thereon, and a material bucket, mechanism for supporting the bucket comprising a mounting frame supported for up and down movements with respect to said upright frame, side bars pivotally attached at forward ends to said mounting frame and having means at their rear ends cooperating with the guide member to swing the bars downwardly as the mounting frame moves upwardly, the said bucket being pivotallysupported upon said mounting frame, means connected between the said bars and the bucket for translating said downward movement of the bars to upward tilting movement of the forward edge of the bucket, and stop means normally located in position to prevent said tilting movement of the bucket but movable to inopera tive position responsive to said dowward move ment of the side bars.

16. In a loader having an upright frame, a guide member thereon, and a material bucket, mechanism for supporting the bucket comprising a mounting frame supported for up and down movements with respect to said upright frame, side bars pivotally attached at forward ends to said mounting frame and having means at their rear ends cooperating with the guide member to swing the bars downwardly as the mounting frame moves upwardly, the said bucket being pivotally supported upon said mounting frame, means connected between the said bars and the bucket for translating said downward movement of the bars to upward tilting movement of the forward edge of the bucket, stop arms swingably supported and normally located in position to engage the rear of the bucket and prevent said tilting movement thereof, and means carried by the side bars normally upwardly engaging said stop arms but adapted to move downward as the bars move downward and thereby enable the arms to swing downward and clear the bucket.

17. In a loader having a frame and a bucket tiltably mounted for upward movement at its rear end to dump its contents, a latch mechanism comprising a swingably supported latch member notched at one end, a pin carried by the bucket for engagement with said notch, and a toggle mechanism for releasing the latch comprising a first arm and a second arm pivotally connected, the second arm being fulcrumed on the latch and adapted at its end to bear against the pin to crowd the latch out of engagement therewith,

I 1 responsive to swinging movement ofthe first arm, and means for swinging saidfirst arm.

18. In a loader having an upright frame; a guide member and a material bucket, mechanism for supporting the bucket comprising in'combination, a mounting frame operatively supported for up and down movements on said upright frame, side members having end portions turned toward said guide member, said side members being pivotally supported on the mountin frame and having means on their said end portions cooperating with the guide member to swing the side members in an upright plane as the mounting frame moves upwardly, the said bucket being pivotally supported on said mounting frame, latch means operative to hold the bucket against pivotal movements, and said latch means being normally operative to connect the side members to the bucket in such manner as to swing the forward edge of the bucket upwardly responsive to said swinging movement of the side members.

19. In a loader having a frame and a material bucket pivotally supported on the frame for upward tilting movements at its forward edge, mechanism operative to tilt the bucket, a swingably supported stop arm normally positioned to engage the rear of the bucket and prevent such tilting movement, and means operative by said tilting mechanism to swing said stop arm to a position at which it will clear the bucket as it is tilted by said mechanism.

20. In a loader having a frame and a material bucket pivotally supported on the frame for upward tilting movements at its forward edge, mechanism operative to tilt the bucket, a swingably supported stop arm normally positioned to engage the rear of the bucket and prevent such tilting movement, means-operative by said tilting mechanism to swing said stop armd'ownwardly to clear the bucket as it is tilted by said mechanism, and means for limiting the stop arm movement in an upward direction so'tli'at it cannot kick-up clear of the bucket.

21. In a loader of the character described; a first frame operatively supported for up and down movements, 9. second frame pivotally supported on said first framameansfor tilting the second frame as the first frame travels, a bucket supported on said frames in such manner as to be tilted from a normal position when the second frame is tilted, and an adjustable stop member carried by the first frame and downwardly engaging the second frame for. leveling the bucket in its said normal position. v

22. In a loader of the character describedhaving an upright guide member and a carrier frame movable upwardly and downwardly with respect thereto, a bucket supporting frame structure secured to and projecting forwardly from said carrier frame, a material bucket tiltably supported by said frame structure, means engageable rearwardly with said guide member and operative to be moved forwardly thereby to tilt the bucket as it is raised, and adjusting shims removably mounted" between the carrier frame and the said framestructure whereby the frame structure and said guide member engaging'means may be adjusted forwardly and rearwardly with respect to said guide member.

23.- In a loader having a frame supported for up and down movements and a material handling bucket pivoted on the frame for up and down tilting movements at its material receiving edge, a latch normally locking the bucket in a level position, and a stop screw supported by the frame and engaging the back of the bucket to hold its material receiving edge from tilting upwardly as'it is thrust into the material for loading.

24. In a loader of the character described, a first frame operatively supported for up and down movements, 2. second frame pivotally supported on said first frame, means for tilting the second frame as the first frame travels, a bucket supported on said frames in such manner as to be tilted from a normal position when the second frame is tilted, and a stop screw threaded on the first frame and adjustablypositionable to engage the second frame for adjusting the said normal position of the bucket.

25; In a loader having a frame and a bucket tiltably mounted for upward movement at its rear end to dump its contents, a latch mechanism comprising a swingably supported latch member notched at one end, a pin carried by the bucket for engagement with said notch, and mechanism for releasing the latch comprising an arm mounted on the latch and manually movable against the pin to crowd it out of the notch and release the'bucket.

LE GRAND H. LULL.

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

UNITED STATES PATENTS Number Name Date 2,301,102 Werthman et al Nov. 3, 1942 2,375,337 Wilson May 8, 1945 2,386,519 Wagner et a1. Oct. 9, 1945 2,394,458 Lull Feb. 5, 1946 2,394,809 Ross Feb. 12, 1946 2,395,634 Martin Feb. 26, 1946' 2,405,312 Mandt Aug. 6, I945 FOREIGN PATENTS Number Country Date 329,460 Great Britain May 22, 1930'

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