US2553531A - Mobile scoop for lift trucks - Google Patents

Description

May15, 1951 1.. T. GRAVES MOBILE SCOOP FOR LIFT TRUCKS Filed Jan. 6, 1948 4 Sheets-Sheet 1 INVENTOR.

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L. T. GRAVES MOBILE SCOOP FOR LIFT TRUCKS May 15, 1951 4 Sheets-Sheet 2 Filed Jan. 6, 1948 v v INVENTOR. L/oyc/ mar/72012 Graves ATTORN svg.

4 Sheets-Sheet 3 May 15, 1951 TI. GRAVES MOBILE SCOOP FOR LIFT TRUCKS Filed Jan. 6, 1948 INVENTOR. Lloyd 7601122012 Graves ATTORN EY$.

M M RN flll MN \m Ym n q 1 km H..\\O o N m. n O o 0 o 0 MN 0 o Y a N w I I, e \W .I o m; l H n \No Wm an u o ow v Tha 4 v wwv N W \Q L. T. GRAVES MOBILE SCOOP FOR LIFT TRUCKS May 15, 1951 4vSh eets-Sheet 4 Filed Jan. 6, 1948 UNITED STATES PATENT OFFICE MOBILE SCOOP FOR LIFT TRUCKS Lloyd Thurman Graves, North Vancouver, British Columbia, Canada, assignor, by direct and mesne assignments, of sixty-six and two-thirds per cent to William Blaylock Steele, Vancouver,

British Columbia, Canada Application January c, 1948, Serial No. 769 24 Claims. (01. 214-120) This invention relates to a mobile scoop for lift trucks, namely a scoop carried upon a vehicle and having a trunnion-mounted bucket supported for bodily movement in a vertical The invention has the Sti l 5 E 21??? 9 38013 01 devising a mechanism of the described character in which said crank-activating bar is caused to be anchored to and released from the frame of the vehicle automatically by vertical moveplane and with the bucket being rotatable about 5 ments given to the scoop bucket in conjunction the center of its trunnions as an axis from a com with controlled tilting of the standard. tered loading position into either of two oppo- Having the foregoing and still other objects site extremes of rolling movement, the one for and advantages in view, and which will appear placing the bucket in a load-carrying position and be understood in the course of the following and the other for placing the bucket in a loaddescription and claims, the invention consists dumping position. This application is a conin the novel construction and in the adaptation tinuation-in-part of my pending application and combination of parts hereinafter described filed in the United States Patent Office June 12, and claimed. 1946, Serial No. 676,238, now abandoned in favor In the accompanying drawings:

of prosecuting the common subject matter in 5 Figure 1 is a fragmentary side elevational view the present application. The present scoop is of with parts broken away and in section to illus- -that character in which the energizing force, and tr'ate a mobile scoop constructed to embody the which is or may be hydraulic, is applied to the preferred teachings of the present'invention, the performance of its bucket-rolling work by conbucket being here shown in a lowered loading nections which are essentially mechanical in 20 position. nature. Fig. 2 is a horizontal sectional view taken to It is an important object of the present ina somewhat larger scale on line 2-2 of Fig. 1. vention to incorporate an upright post or stand- Fig. 3 is a fragmentary side elevational view ard as a guide for the bodily vertical movement with parts broken away and in section and illusof the bucket, to give this standard a pivotal trating the upright standard as having been footing enabling the same to be tilted either fortilted rearwardly to respensively roll e bucket wardly or backwardly, and to so tie in this standinto load-carrying position, the scale correspondard with said referred-to mechanical connecing to that of Fig. 2. tions as to effectuate a rollingof the bucket in Fig. 4 is a fragmenta y Side elevatio al View direct response tothe tilting of the standard. ill strating h u k as having b n ev d It is a further and important object to engi and p e Scale here p oy eneer said mechanical connections such that only pe di to that O Fig. 1; and a, minor degree of tilt transmitted to the stand- Fi 5 is a r ver e v r al io al vi w ard will transmit to the bucket a major degree on the jogged line 5-5 of Fig. 1. of rolling movement. The vehicle which I have illustrated and The invention has the still further and imwhich giv s mobility to the s op stru tur o portant object of providing an arrangement in the present invention is indicated as providing which the tilting of the standard is accomtwo traction wheels at the front, designated by plished by a connection which is made with the e numeral Ill, and having a Single steerable foot rather than, as has been heretofore usual, 40 Wheel shown) at the rear An eperators with the head end of the standard, thus obviatseat is sh wn at I, and t r ar pr vid d ring the objection of having any load-stressed tain necessary controls both for the operation member above the head of the operator. of-the' vehicle and for the rolling and hoisting of It is a further object still to devise a perfected the scoop-bucket'but other than for the showmechanism by which to tilt the bucket and one, ing of a trip-cord l2 no effort is made to detail more especially. embodying a crank linked to any of the scoop-bucket controls. the bucket and'fulcrumed for. movement about Supported from pedestal blocks I3 bolted to the a center which. is shiftable bodily with the frame at the front end thereof is a transverse upright standard about the tilt-axis of the latshaft l4, and this shaft forms a pivot mounting .ter, and including, as one element of said mechfor a pair of upright posts l5-l6 disposed in lat- .anism, an anchoring bar one end of which conerally spaced relation and rigidly coupled top and nects with the crank and the other end of which, bottom by tie-bars l1 and [8 to form a unitary to accomplish activation of the crank, is arstructure. The two posts are each of channel ranged and adapted to be localized in relation to construction with the gutters in facin relation, the frame of e supportin vehicle. and there is slidably associated therewith an inner framework similarly composed of a pair of transversely-tied channel members denoted I9 and 20, and which likewise have their gutters in facing relation. The slide connection between said outer and inner channel members comprises verticallyspaced sets of rollers 2i journal-mounted from the inner channel members and working in the gutters of the outer channel members, and there is also provided a guide roller 22 at the head end of each outer channel. This telescoping framework, hereinafter termed the standard, is given controlled tilting movement through a limited degree of travel working in opposite directions from a median center, preferably 10 out of the perpendicular in a forward direction and out of the perpendicular in a rearward direction, and such movement is indicated as being effected through means of piston rods 23 en aging the bottom ends of the outer posts l5l6 and having their piston principals received in double-acting hydraulic cylinders 24. In lieu of this indicated hook-up, and which I have elected to portray only for purposes of simplifying the illustration, the structural assembly which I actually utilize employs only a single double-acting cylinder and this cylinder, exerting thrust in a direction longitudinal to the vehicle, activates a crank arm which is made fast to a pivot shaft extending transverse to the vehicle, the pivot shaft being provided upon its two ends with crank arms which connect by their free ends one with one side and the other with the other side of the upright standard. For extending the telescoping standard there is provided a hydraulic cylinder footing upon the bot- 1 tom cross-tie l8 and having the piston 25 which is received therein exerting its thrust upon the cross-member which ties the upper ends of the inner posts together. There is secured upon the exposed upper sections of said piston a fitting which presents trunnion pins 26 for the journalmounting, at each side of the piston, of a respective sprocket wheel 21. Passing over these sprocket wheels are chains 28, one end of which is anchored as at 29 to the cylinder and the other end of which is attached, as at 30, to a carriage 3| movable vertically in relation to the telescoping standard and deriving its slide mounting from sets of rollers 32 working in the gutters of the inner channels l9 and 20.

This carriage, Or that is to say the body proper of the same, lies to the front of the telescoping standards and carries a transverse pivot-shaft 33 from which there is hung a harness 34 having a U-shaped plan configuration, the harness serving as a mounting for the scoop-bucket 35v which, for its pivot support, presents at each side a trunnion pin 36 journaled in a respective cheek-arm 31 of theharness.

Now to describe the bucket-rolling mechanism, there is welded or otherwise secured at opposite sides of the harness and in surmounting relation to the cross-arm of the U a pair of cb-axial pillow-blocks 38. Journaled in these pillow-blocks is a rocker-shaft 40, and made integral with the rocker-shaft are levers producing, at each side of the 'buckets longitudinal center line, a substantial bell-crank one arm 4| of which is placed outside and the other arm :12 of which is placed inside the related pillow block. The arm M connects by its free end with a link 43 which connects in turn to a side wall of the bucket by a pin 4 and the arm 42 pivotally connects by its free end with a horizontal anchor bar 45. This latter connection, denoted 46, is made at a point intermediate the ends, and such, more especially, as to present a long arm 47 extending rearwardly and a short arm 48 extending forwardly from the pivot, said long arm being of a length to overlie the front end of the vehicle proper. Such anchor bar, and as can be best seen from an inspection of Fig. 2, is desirably fabricated from an extended length of bar stock bent upon itself to produce an open bite, the bite being located at the rear extremity of the long arm and having the eye 58 which is thereby formed boxed in at the rear by a welded stay 5!. Welded upon the underside of the arm and leading forwardly from the stay is a wiping apron '52. The eye 50, by predetermined tilting movement given to the upright standard, is caused to register with an anchoring horn 53 integrated with the frame of the vehicle and by dropping over the latter localizes the toe of the anchor bar in relation to the Vehicle. In order that the anchor bar may pivot about the pin 45 'while' at thesame time countering any tendency for the long arm to drop by its own weight, there is applied to the other or short arm 48 of the bar a balancin spring 54. Two of these balancing springs are provided, one atone side and the other at the other side of the scoops longitudinal center, and the same connect by one end with the harness 38 and have their other end fastened to the free end of a respective knee 55 which is made fast to a cross-rod 56 extending from the anchor bar at one side to the anchor bar at the other side of the scoop, the ends of this rod being rigid with the short arms of the anchor bars. The knees are jointedto permit adjustment of the angle to which the articulating legs are set, thus to assure that the'anchor bars, when in their normal floating condition, will occupy the position necessary to properly locate the same in relation to the anchoring horns.

Completing the mechanism of the present invention is a brake comprised of a drum 5'! carried upon a projecting end of one of the two trunnion shafts of the bucket, and receiving thereover a brake band 58 one end of which is anchored, as at 60, to the harness and the other end of which is tied to one end of a lever 61 fulcrumed to the harness as at 62, the other end of the lever .being engaged by a spring 63 the tensioned force of which is so applied as to normally set the brake. The brake itself is so arranged as to be selfwrapping, and which is to say that the greater the torsional force transmitted by the weight of the buckets load to the brake drum, the greater the resistance to which the brake band subjects said drum. For effecting a release of the brake, the lever BI is linked to a compounding lever 64 terminally fulcrumed as at 65 to the harness and having its free end connected by a shackle 66 with the trip-cord [2, the trip-cord, as previously described, extending rearwardly into convenient reach of the operator.

As before stated, the upright telescoping standard is tiltable through an angle of approximately 25, and which is distributed 10 in a forward direction and 15 in a rearward direction from center. Separate control levers are provided, one to accomplish the tilting action and one to accomplish the hoisting action. Both levers automatically return to a neutral position upon being released, and the operations are such that the standard or the carriage, as the case may be, is, upon said release, hydraulically locked in the position then occupied. This over-all tilting travel of 25 transmits, by the linkage which I employ, a rotation of the bucket approaching The operation may be described as follows:

Let it be assumed that a previous load has .free of the horns. carrying position and the vehicle with its sustained load is moved to the dumping site, where- I disposed perpendicular, or which is to say at a reading on the protractor which serves as a tilting guide for the operator. To now reload the bucket, the operator tilts the standard forward and the parts will then occupy the positions in which they are shown in Fig. 4, whereupon the lift-control lever is depressed to lower the bucket and, as the lip of the digging blade touches the ground, the vehicle is backed up,

a downward push upon the back end of the bucket rolling the lip of the digging blade upwardly. The vehicle is thereupon driven forwardly into the pile of material being loaded and, as the penetration proceeds to a point at which the driving wheels evidence slippage, the tilting lever is now again raised to tilt the upright standard to its rearmost position, at the same time maintaining a forward drive to complete the filling of thescoop as the bucket responsively rolls upwardly into the approximate upward rolling action takes place, and which is caused by the further thrust action transmitted from the horn-localized anchor bar to the arm 42 of the bell-crank, the coincident rise of the bell-cranks fulcrum 40 as the same moves in arcuate travel about the center of the pivot-shaft M as an axis will have caused the level of the anchor bar to change and the short arm 48 thereof will now point upwardly rather than downwardly from the pivot 46, consequently stretching the springs 54 in a degree sufficient l to slightly tension the anchor bar. The operator thereupon momentarily depresses the tilt-control lever to"bump the upright standard in a forward direction and this relieves the anchor bar from its friction purchase with the anchoring horns and the tension of the springs 54 thereupon takes effect to lift the long arms 41 The load is then hoisted into upon the upright standard is tilted forwardly into an approximatecentered position (0 on the indicator dial) and the trip-cord is pulled to ,release the brake and allow the bucket to roll by position in which it is shown in Fig. 3. As this sibility of overbalancing the vehicle the trip-cord clearly understood from the foregoing detailed description having particular reference to the illustrated now-preferred embodiment, but it is self-evident that minor changes in details of construction may be resorted to without departing from the spirit of the invention and I therefore intend that the hereto annexed claims be read 6' p, with only such restrictions as are expressly intro-. duced thereto.

What I claim is: V

l. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported for tilting movement by the mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel mounting, power means for raising the bucket, power means for tilting the standard, and means acting automatically in response to rearward tilting movement of the standard to cause the bucket to roll about the swivel center of the bucket as an axis from a load receiving into a load-carrying position.

'2. A mobile scoop comprising, in combination with a mobile mounting, an upright telescoping standard pivotally supported for tilting movement upon said mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel mounting, power means for extending the telescoping sections of the standard and coincidently raising the bucket through a travel'path approximating the overall height of the extended standard, power means for tilting the'standard, and means actin automatically in response to rearward tilting movement of the standard to Y ard located at the front of the vehicle and pivotally supported by the latter for tilting movement about a transversse horizontal axis spaced above the bottom end of the standard, a scoop-bucket carried by the standard, a source of hydraulic energy carried by the vehicle, and means operated from said energy source and connecting with the foot of the standard for tilting the latter, said means comprising a hydraulic ram and. an associated co-axial connectin rod arranged for unitary enolwise movement along a longitudinal horizontal axis.

4. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported for tilting movement by the mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical move- .ment of the bucket and its swivel mounting, re

leasable brake means for resisting rotation of the bucket about its swivel center, powered means for raising the bucket, powered means for tilting the standard, and means made responsive to tilting movements of the standard for automatically rolling the bucket about its swivel center as an axis.

5. A mobile scoop comprising, in combination with a mobile mounting, an upright standard "pivotally supported for tilting movement by said mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel-mounting, releasable brake means acting when set to prevent swivel movement of the bucket in one direction of rotation, power means for raisin the bucket and for tilting the standard, and means made responsive to a rearwardly directed tilting movement of the standard for automatically rolling the bucket in the other direction of the latters rotation.

. 6. A mobile scoop comprising, in combination with a mobile mounting, an upright standard amass;

nivqtallysupported b the mounting for tilting movement fore and aft of a perpendicu lar center, a swivel-mounted scoop-buc supp rted by said standard for bodily vertical movement of the bucket and its swivel mounting, a brake drum fast to the bucket and placed concentric to the swivel axis of the latter, a releasable self-wrapping brake-band functional to, the drum and acting, when set, to prevent swivel movement of the bucket in a loaddumping directionv of rotation, power means for raising the bucket and for tilting the standard, and means made responsive to a rearwardly directed tilting movement of the standard for automatically rolling the bucket in a load-carrying direction of rotation.

'7. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported by the mounting for tilting movement fore and aft of. a perpendicular center, a. swivel-mounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel mounting, an anchoring member movable bodily with said, bucket in the vertical, movement of the latter, means provided by said. mobile. mounting arranged to automatically engage andv localize said anchoring member upon a. location of the bucket at the lower extreme of its vertical travel, means operatively interconnecting said anchoring member with the bucket and acting by a rearward tilting of the standard to automatically roll the bucket about the. latters swivel center as an axis, and power means for raising the bucket and for tiltin the standard.

8. A mobile scoop comprising, in combination with. a mobile. m un in a upr ht stand piyotally supported by the mounting for tilting movement fore and aft of a perpendicular center, a swivel-mounted scoop-bucket supported, by said, standard for bodily vertical movement of the bucket and its swivel mounting, an anchoring member also movable bodily with said bucket in the vertical travel of the latter, power means for raising the bucket and for tilting the standard, means provided by said mobile mounting arranged to automatically engage and localize said anchoring member to the mobile mounting upon a descending movement of the bucket into the lower extreme of the latters vertical travel, means operatively interconnecting said anchoring member with the bucket and actin by a rearward tilting of the standard to automatically roll the bucket in a load-carrying direction of rotation, and releasable means preventing the bucket from rolling in a load-dumping direction of rotation.

9. The mobile scoop of claim 8 in which the means last recited comprises a brake drum and a complementing self-wrapping brake band and with the brake drum being fast to the bucket and placed concentric to the swivel axis of the latter.

10. A mobile scoop comprising, in combination with a mobile mounting, an upright standard .pivotally supported for tilting movement by the mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel mounting, an anchoring member also movable bodily with said bucket in the vertical travel of the latter, power means for raising the. bucket and for tilting the standard, means provided by said mobile mounting arranged by descendin movement of the bucket to automati lly n a said a c oring member as, the bucket. reaches the lower extreme f. its. vert cal. traveL, mea s op ativdy n erconnecting said anchorin member with the bucket and acting automatically by a rearward tilting of the standard. to roll the bucket, and means functional upon said anchoring member to, automatically disengage the latter from the mobile mounting responsive to a following bump.-tilting of the standard in a forward direction.

11. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported for tiltin movement by the mounting, a swivelrmounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel mounting, an upstanding anchoring horn provided by the mobile mounting, a member also movable bodily with said bucket in the latters vertical travel and arranged, by descending movement of the bucket to lodge itself over said anchoring horn, and means operatively interconnecting said horn-engaging member with the bucket and acting automatically when the member is lodged over said anchoring horn and in response to a rearward tilting of the standard to transmit movement to the bucket. rolling the latter about its swivel center as an axis.

12. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported for tilting movement by the mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel mounting, an

upstanding anchoring horn provided by the mobile mounting, a pivoted bar also movable bodily with said bucket in the latters vertical travel and arranged by descending movement of the bucket to lodge by its free end over said anchoring horn, power means for tilting the standard and for raising the bucket, means operatively interconnecting said pivoted bar with the bucket and acting automatically when the bar is lodged over the horn and in response to a rearward tilting of the standard to transmit rolling movement to the bucket, and spring means normalizing the bar to a given position, said spring means being tensioned by said bucket-rolling tilting of the standard and acting to automatically disengage the bar from the horn responsive to a following bump-tilting of the standard in a forward direction.

13. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported by the mounting for tilting movement about a, transverse horizontal axis, a swivel-mounted scoop-bucket supported by said standard ior bodily vertical movement of the bucket and its swivel mounting, power means for tilting the standard and for raising the bucket, a. pivoted bar also movable bodily with the bucket in the latters vertical travel and arranged to be releasably connected by its free end with the mobile mounting when the bucket occupies its lowered position, means operatively interconnecting said pivoted bar with the bucket and acting automatically when the bar is connected with the mounting and in response to a rearward tilting of the standard to transmit rolling movement to the bucket, and spring means normalizing the bar to a given position, said spring means being tensioned by said bucket-rolling tilting of the standard and acting to automatically disconnect the bar from the mounting responsive to a following bump-tilting ofthe standard in a forward direction; l

14. A mobile scoop comprising, in combination mounting when the bucket occupies its lowered position, means operatively interconnecting said pivoted bar with the bucket and acting automatically when the'bar is connected with the mounting'and in response to a rearward tilting'of' the standard to transmit rolling movement to the bucket, and spring means normalizing the bar to a given position, saidspring means beingtensioned bysaid bucket-rolling tilting of the standard and acting to automatically disconnect the bar from the mounting responsive to a following bump-tilting of the standard in a forward direction. Y 15. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported by the mounting for tilting movement about a transverse horizontal axis, a harness supported for vertical movement by said standard, a scoop-bucket swivel-mounted in said harness, power means for tilting the standard and for raising the bucket, a bell-crank fulcrumed to the harness and linked by one of its lever arms to the bucket such as to roll the bucket about its swivel axis by rocking action of the bellcrank, and a bar pivotally attached to the other arm of the bell-crank and arranged to receive an anchoring fix from the mobile mounting whereby upon tilting of said standard to rock the bellcrank.

16. The mobile scoop of claim 15' having releasable brake means adapted to resist rotation of the bucket about its swivel axis.

1'7. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported by the mounting for tilting movement about a transverse horizontal axis, a harness supported for vertical movement by the standard, a scoop-bucket swivel-mounted in said level of the standards pivotal axis, a connection frorn-one arm ofsaid bell-crank to the bucket acting to roll the bucket by rocking action of the bell-crank, a bar pivotally attached to the free end of the bell-cranks other arm and arranged 'to receive an anchoring fix from the mobile mounting whereby upon tilting of said standard torock thebell-crank, and spring means normalizing the bar to a given position and tensioned by said bucket-rolling tilting oi the standard,

19. A mobile scoop comprising, in combination witha mobile, mounting, an upright standard 4 pivotally supported by the mounting for tilting -movement about a transverse horizontal axis, a

harness supported for vertical movement by the standard, a scoop-bucket swivel-mounted in said set, to hold the bucket against rotation in a ,load-dumping direction, power means for tilting the bucket and for elevating the harness, a

,' transverse pivot-shaft receiving a journal mounting from the harness and extending from one to the other side limit of the latter, a pair of crank levers fixedly carried upon an end of said pivot-shaft, an anchoring horn provided by the mobile mounting at one side of the scoop, an approximately horizontal thrust bar extending fore and aft as respects the bucket and pivoted intermediate its ends to the free extremity of harness, power means for tilting the standard and l for raising the bucket, a bell-crank fulcrumed to the harness for rocker movement about a transverse horizontal axis located above the level of the standards pivotal axis, a connection from one arm of said bell-crank to the bucket acting to roll the bucket by rocking action of the bellcrank, and a bar pivotally attached to the .free end of the bell-cranks other arm and arranged to receive an anchoring fix from the mobile mounting whereby upon tilting of said standard to rock the bell-crank.

18. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported by the mounting for tilting movement about a transverse horizontal axis, a harness supported for vertical movement by the standard, a scoop-bucket swivel-mounted in said harness, power means for tilting the standard and for raising the bucket, a bell-crank fulcrumed to the harness for rocker movement about a transverse horizontal axis located above the one of said crank levers and arranged upon a lowering of the harness to have its rear extremity lodge over said anchoring horn and responsively rock the pivot-shaft upon a rearward tilting of the standard, connection from the free extremity of the other crank lever to the bucket acting by said rocking movement of the pivot-shaft to roll the bucket, counterparts of said crank levers, thrust bar, horn, and bucket-rolling connection at the other side of the scoop, a cross-shaft connecting the forward ends of the two thrust bars, and extension springs attached by one end to the harness and by the other end to the crossshaft, said springs normalizing the thrust bars to a given position and being tensioned by said bucket-rolling tilting of the standard whereby to automatically free the thrust bars from the anchoring horns responsive to a following bump-tilting of the standard in a forward direction.

20. A mobile scoop according to claim 19, said brake band being spring-set, and an assembly of compounded levers operatively interconnected with the brake band for releasing the brake against the brake-setting force of the spring.

21. A material-handling vehicle comprising, in combination with a mobile mounting, an upright standard located at an end of said mounting and pivotally supported by the latter for tilting movement about a transverse horizontal axis spaced above the bottom end of the standard, a material-handling device carried by the standard, a source of power, and means powered off said source and making connection with the standard at a point below the standards pivotal axis for tilting the standard, said means comprising a hydraulic ram and an associated co-axial connecting'rod arranged for unitary endwise movement along a longitudinal horizontal axis.

22. A mobile scoop comprising, in combination with a mobile mounting, an upright standard pivotally supported for tilting movement by the mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical move- 11 iner'i't of the bucket and it's swivel mounting, power-operated means for raising the bucket and for tilting the standard, and means acting automatically in response to rearward tilting movement of the standard to cause the bucket to -r'ol'l about the swivel center of the bucket as an aids from a load-receiving into a load-carry i'ng position, a 4

-23. 'A 'mobile scooip comprising, in combination with a mobile mounting, an upright standard p votany supported for tilting movement by the mounting, a swivel-mounted scoop-bucket supported by said standard for bodily vertical movement of the bucket and its swivel mounting, power-operated means for raising the bucket and for tilting the standard, an anchoring member r'riovable bodily with said bucket in the vertical travel of the latter, means provided by the mobile mounting arranged iipon'a lowering of the bucket to a predetermined point to be engaged by said withering member and by said engagementober'a'ti'ng to localize the anchoringmember, "and operative interconnection from the anchoring member to the bucket acting when the former "is localized andin response to tilting movement of the standard to roll the bucket.

-24. A mobile scoop'com' 'risin inc'dmbiha'tion with a mobile mounting, "an upright standard pivotally supported for tilting movement by the mounting, a "swivel-mounted scoop-bucket sup- 12 ported by said standard, power-ofieratedfxneans ort lt thest ndardian ar ccupying a pproximatejhorizontal position transverse to the pivotal axisl-oisthe standard and arranged to take. a localizing M purchase from, the mountin and operativ in nn ction om said, armetothe bucketactins. om ca y by the lo aliz g. of th to m r, and i re p se t -a, ti1ting ofwthestandard tq roll thebucket about its swivel axis irom a load-receiving into a loadcarr'ying position.v V. i v

LLOYD TI-IURMAN GRAVES.

7 e'm iin The foiiowiu references are or record in the me or this a1 I PATENTS mate:

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