US2697291A

US2697291A - Self-loading carry-type earth excavating machine

Info

Publication number: US2697291A
Application number: US109277A
Authority: US
Inventors: Bernard B Hooper
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-08-09
Filing date: 1949-08-09
Publication date: 1954-12-21
Anticipated expiration: 1971-12-21

Description

Dec. 21, 1954 B. B. HooPER 2,697,291

SELF-LOADING CARRY-TYPE EARTH ExcAvATING MACHINE Filed Aug. 9, 19449 6 Sheets-Sheet l BERNARD B. HOOPER ATTORNEYS Dec. 21, 1954 B. B. HooPER 2,697,291

SELF-LOADING CARRY-TYPE EARTH EXCAVATING MACHINE 6 Sheets-Sheet 2 Filed Aug. 9, 1949 INVENTOR BERNARD B. HOOPER ATTORNEYS B. B. HOOPER Dec. 2l, 1954 6 Shees-j-Sheet 3 Filed Aug. 9, 1949 B. B. HOOPER Dec. 2l, 1954 SELF-LOADING CARRY-TYPE EARTH EXCAVATING MACHINE 6 Sheets-Sheet 4 Filed Aug. 9, 1949 R. m n W.

ATTONEYS.

Dec. 2l, 1954 v B. B. HooPER 2,697,291

SELF-LOADING CARRY-TYPE EARTH EXCAVATING MACHINE v Filed Aug. 9, 1949 e sheets-sheet 5 FIG. 5.

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Dec. 21, 1954 B. B. Hoor-ER 2,697,291

SELF-LOADING CARRY-TYPE EARTH EXCAVATING MACHINE Filed Aug. 9, 1949 e sheets-sheet e FIG. 6

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INVENTOR. BERNARD a HOOPER BY Wifmmmwm'mm ATTORNEYS United States Patent 4C) SELF-LOADING CARRY-TYPE EARTH EXCAVATING MACHINE Bernard B. Hooper, Midland, Oreg.

Application August 9, 1949, Serial No. 109,277

4 Claims. (Cl. 37-126) This invention relates to a dirt-moving machine, and more particularly to a self-loading, dirt-moving machine.

It is an object of this invention to provide' an excavating and dirt-moving machine of the kind to be more particularly described hereinafter, having a suspended bucket which may be raised and lowered in a mobile supporting frame and having a scraper blade or dozer slidable in the bucket for moving the excavated dirt to the rear end of the bucket to increase the loading capacity prior to movement of the machine to a point of discharging the dirt from the bucket.

Another object of this invention is to provide a. selfloading, dirt-moving machine of this kind which is adapted to be drawn by and operatively connected to conventional types of endless tread tractors and the like having suitable power and accessory driving means for loading and hauling loads of excavated dirt approximately four and ve times greater than the loads which may be presently handled by excavating machines presently in use.

Still another object of this invention is to` provide an excavating and hauling machine of this kind having a mobile frame and an excavating bucket suspended in the frame. A scraper or dozer blade is carried by the frame for horizontal and vertical movement for compactly loading the dirt in the bucket and for restraining the dirt therein when the bucket is loaded to the full capacity. A 1ongitudinally-movable tailgate or rear wall is slidably supported in the bucket for moving the load forwardly at the point of discharge, and the removal of the load is facilitated by the raising of the rear end of the bucket so that the tailgate and dirt will slide downwardly. The front and rear suspension of the excavating bucket provides for the selective angular disposition of the bucket for the various phases of operation, as the loading, hauling and subsequent unloading. The means for actuatingthe various movable parts of this excavator are operatively connected to suitable winding drums and power-actuating means on the tractor.

A further object of this invention is to provide a selfloading excavating machine of this kind having a suspended scraper and bucket supported on a mobile frame in such a manner that upon failure of the bucket-suspension means a safety catch mechanism will hold the bucket in a condition for restraining the load thereinand holding the bucket in a position on the frame which will in no manner retard the movement of the entire machine.

With the above'and other objects in view, my invention consists in thearrangernent, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a perspective view of an excavating and hauling machineconstructed according to an embodiment of my invention;

, Figure 2 is a perspective diagrammatic view of the dozer carriage actuating-means for sliding the dozer carriage rearwardly on the frame and showing the control means for adjustably limiting the rearward movement of the dozer carriage; l

Figure 2A is a perspective view of the excavating and hauling machine of Figure l, with parts broken away, including the separate cable and pulley mechanism for effecting the raising and lowering movements ofl the front and rear ends of the bowl;

Figure 2B is a diagrammatic view of the cable yand pulley mechanism for effecting the rearward movement of 2,697,291 Patented Dec. 21, 1954 the carriage and the scraper blade carried thereby within the bowl, and of the cooperating stop means and the cable and pulley operating mechanism therefor for controlling the extent of the rearward movement of the carriage;

Figure 3 is a perspective diagrammatic view showing the actuating means for sliding the rear wall or tailgate forwardly in the bowl, the means for raising the scraper blade and the stop means for limiting the forward sliding movement of the dozer carriage on the frame;

Figure 3A is a perspective view of the excavating and hauling machine of Figure-l, with parts broken away, including the cable and pulley mechanism for effecting the rearward movement of the carriage and the scraper blade carried thereby, of the cooperating stop means and the cable and pulley mechanism therefor for controlling the extent of the rearward movement of the carriage, cable and pulley mechanism for effecting the vertical up and down movement of the scraper blade, and of the stop means and the cable and pulley mechanism therefor fori limiting the forward movement of the carriage;

Figure 3B is a diagrammatic view of the cable and pulley mechanism for effecting the forward movement of. the pusher plate, and of the cable and pulley mechanism for effecting the vertical up and down movement of the scraper blade;

Figure 3C is a diagrammatic view of the stop means and cable and pulley mechanism therefor for limiting the forward movement of the carriage;

Figure 4 is a diagrammatic View of the cable andv pulley mechanism, with parts exploded, for elfecting the rlgaisilg and lowering movements of the rear end of the Figure 5 is a diagrammatic view of the cable and pulley mechanism, with parts exploded, for effecting the raising and lowering movements of the front end of the bowl;

Figure 6 is a longitudinal section, partly broken away, of the forward end of the excavating machine; and

Figure 7 is a rear elevation, partly broken away and partly in section.

Referring to the drawings, the numeral 10 designates generally an excavating and hauling machine or scraper constructed according to an embodiment of this invention. The scraper or excavator 10 is formed with a mobile frame 11 having a bucket or bowl 12 supported therein and a loading member 14 slidably supported on the frame and an unloading member 15 slidably supported in the bowl 12.

The frame 11 is formed with a pair of substantially tri-` angular side walls 16 connected together at their forward ends by a transverse frame member or bar 17 and at their rear ends by a substantially rectangular frame-supporting means 18. A supporting post or pedestal 19 is fixed to or formed integrally with the center portion of the transverse bar 17 and depends therefrom. A pair of trucks 20 are. supported on the lower end of the pedestal 19 for steering, the trucks 20 shown in the drawings being formed of endless track members which may be employed on an excavating machine of this kind where the machine is used for supporting extremely heavy loads and is moved only at slow speeds. The track members 20 may be replaced by suitable supporting wheels for supporting the frame when the frame is used for hauling the material at higher speeds:- A pair of transversely-spaced-

apart trucks

21 and 22 are carried by the rear frame member 18 at the rear end of` the frame 11, the

trucks

21 and 22 being equipped with' endless tracks in the same manner as the truck 420 andv being replaceable by large wheels when more particularly adapted for the use of the excavator or scraper 10.

The bucket or bowl 12 is substantially rectangular in' conlguration, having a pair of transversely-spaced-apart\ side walls 24 connected together at their rear ends by a; fixed rear wall 25 and being open at the forward ends thereof. A bottom plate or wall 26 is fixed between the` lower edges of the side walls 24 and to the lower end of the xed rear wall 25. A cutting or scraper blade 27 is fixed to or formed on the extreme forward end of the bottom wall 26 and is inclined downwardly and forwardly therefrom for disposition below the plane defined by the bottom Wall. The side walls 24 are formed at their lower 3 pended Within the frame 11 for vertical sliding movement, the opposite ends of the bowl 12 having separate actuating means for separately raising or lowering the respective ends thereof, to thereby effect longitudinal vertical tilting movement of the bowl.

The separate means for raising and lowering the rearv endof the bowl 12, Figures 2A and 4, comprises a cable 28 having one end anchored as at 29 to the exterior sui-, face of the rear wall of the bowl 12, the cable being trained over a guide pulley 30 fixedly mounted on one of the side walls 16 of the frame 11, thence over the upper one of the sheaves of a double sheave block 31 also fxedly mounted to said one side wall 16, thence over a sheave 32 carried by a movable or slidable triple sheave block 33, thence over the lower one of the sheaves of the double sheave block 31, thence over a guide pulley 34 fixedly mounted on the rear end frame supporting means 18, thence over a guide pulley 35 fixedly mounted on the other side wall 16 of the bowl 12, and thence downwardly along thte exterior surface of the rear wall 25 of the bowl :12 with the other end of the cable 28 being anchored as at 29" to the exterior surface of the rear wall 25. The movable or slidable triple sheave block 33 is connected to a triple sheave block 36 fixedly mounted on the rear end frame supporting means 18 by means of a triple return lifting cable 38, one end 37, Figure 4, of the cable 38 being fixedly secured to the frame of the block 36. Cable 38 is received about the

triple sheave blocks

33 and 36 and then extends from the uppermost one of the sheaves of the block 36 along the other side wall 16 of the frame 11, thence around a guide pulley 39 fixedly mounted on the front bar 17, thence over a pulley 48 also fxedly mounted on the bar 17, thence over a pulley 1 fixedly supported from the bar 17 thence over a pulley 5 also fixedly supported from the bar 17, and thence forwardly for connection to the power cable actuating drum or other suitablenctuating means carried by the tractor which is used for drawing the excavator 10.

For lifting the rear end of the bowl 12, the cable 38 is tensioned by the power cable actuating means, causing the movable triple sheave block 33 to move toward the fixed triple sheave block 36 and with such movement the sheave 32 is correspondingly moved to exert a tensioning or pulling upon the cable 28. Operation of the power cable actuating means so as to release the tension upon thefcable 38, results in the movement of the triple sheave block 33 away from the fixed triple sheave block 36, and release of the tension on the cable 28 and lowering of the rear end of the bowl 12.

kA pair of vertically-extending ratchet members 41 are fixed to the side walls 16 of the mobile frame 11 at the rear end thereof. A bracket 42 is fixed on each side of therear frame member 18 at the lower end thereof, and a pawl 44 is pivotally supported intermediate its ends in each of the brackets. Pawl 44 has a forwardly extending Lshaped lever arm 48 which extends outwardly from the pivot point thereof, the long leg 48 'of the arm 48 being integral with the pawl. A pair of springs 45 are supported between the brackets 42 and the short legs 48 of the pawls 44 for constantly pressing the tooth or dog 47 on each of the pawls into locking engagement with the teeth 46 carried by the Vratchets 41.. One end of each of the springs 45 is fixedly secured to the brackets 42, while the other end of the spring is connected to the short leg 48 of the lever arm 48, Figure 1, the short leg being outside of. .and bearing against the adacent stretch 49 of the cable 28. The cable normally holds the pawls out of engagement with the ratchets 41. Upon breaking of either Vone of the stretches 49 of the cable 28 at any point along the length thereof, the springs 45 will instantly bias the pawls 44 into engagement with the ratchets 41 for locking the rear end of the bowl in 'its adjusted positionv at that time. This locking of the' rear end of the bowl 12 upon failure of the suspension cable 28 willhnld the `rear end 'of the bowl upwardly so that the excavating machine 10 may be freely moved about for further'unloa'ding or loading the bowl until such time asthe necessary repairs may be accomplished.

The separate means for raisin-g and lowering the forward end of the bowl 12, Figures 2A and 5, comprises a cable 51 having one end anchored as at 52 to' the interior surface ofthe one of the side walls 16 of the frame 11, the cable being trained' over a pulley 511 mounted on the exterior surfaceof one of thev side walls' 24 of the' bowl 12', thence over' a pulley 54 mounted on the interior surface of said one of the side walls 16 of the frame 11, thence over a pulley 56 likewise supported on said one of the side walls 16 of the frame 11, thence over pulley 55 mounted on the front end bar 17 of the frame 11, thence over a sheave 58 carried by a movable or slidable triple sheave block 59, thence over a pulley 57 xedly mounted on the front end bar 17, thence over a pulley 53 fixedly mounted on the interior surface of the other of the side walls 16 of the frame 11, thence over a pulley 50 fixedly mounted on the other side wall 24 of the bowl 12, with the other end of the cable 51 being anchored as at 52' to the exterior surface of the other of the side walls 24 of the bowl 12. The movable or slidable triple sheave block 59 is connected to a quadruple sheave block 60 fixedly mounted on the front end bar 17 by means of a quadruple return lifting cable 61, one end 61', Figure 5, being fixedly secured to the frame of the block 59. The cable 61 extends from the outermost one of the sheaves of the block 60 over a pulley 3 xedly supported on the front end bar 17, thence over a pulley 4 also fixedly mounted on the bar 17, thence over a pulley 2- l-ikewise fixedly mounted on the bar 17, and thence forwardly for connection to a power cable actuating drum.

For lifting the front end of the bowl 12, the cable 61 is tensioned by the power actuating means, causing the movable triple sheave block 59 to move toward the fixed quadruple sheave block and with such movement, the sheave58 is correspondingly moved to exert a tensioning or pulling upon the cable 51. Operation of the power cable actuating means so as Vto release the tension upon the cable 61, results in themovement of the sheave block 59 away from the fixed sheave block 60, and release of the tension on the cable 51 and lowering of the front end of the bowl 12.

A pair of confronting channel members 62 are fixed to, or formed on, the upper longitudinal edges of the side walls 24 of the bowl 12 and extend along the length thereof. The unloading member or pusher plate 15 is slidably supported in thefbowl 12 by the engagement of a supporting member 64 in the channels 62 on the opposite side walls 24. The supporting member 64 is formed with a transverse bar or member 65 extending transversely of the bowl 12, pairs of rollers 66 are rotatably f supported on the opposite side ends of the transverse member 65 and are rotatably engageable in the channels 62. The channel 'guide members or rails 62 suitably support the unloading member 15 for sliding engagement along the entire length of the bowl 12. A depending plate 67 is fixed at its upper transverse edge to the lower side of the transverse supporting bar or supporting member 65 and extends downwardly into the body portion of the bowl 12. The plate 67 defines a false end wall or tailgate for the bowl 12 and is supported for sliding movement for moving the dirt or material within the bowl forwardly through the'forward open end thereof for unloading the bowl or bucket.

The means for effecting the forward movement or the longitudinal movement of the pusher plate 15 away from the closed end of the bowl 12, Figures 3B and 3,

comprises a cable 68 having one end anchored as at 68 to one of the supporting members 64, the cable extending forwardly along one of the side walls 24 of the bowl 12, thence over a pulley 69 carried by said one side wall 24 adjacent the front upper end thereof, thence over a pulley 70 carried by the one Side wall 16 of the frame 11 adjacent the forward end of the side w'all, thence over the inter` mediate sheave 71b of a triple sheave block 71 supported on the front end bar 17 thence over a sheave 72 carried by a movable double sheave block 74, thence over the uppermost sheave 71a of the sheave block 71, thence over a pulley 73 carried by the bar 17, thence over a pulley 75 carried bythe other side wall 16 of the frame 11 adjacent the forward end of the latter named side wall, thence over a pulley 76 carried by the other'side'y wall 24 of the bowl 12, the cable 681 extending rearwardly' 'along the other of the side walls 24 of the b'wl I2 and having the other end anchored as at 68 to the other of the supporting members 64. The movable double sheave block 74 is connected to a double sheave block 200 fixedly mounted on the said one side wall 16 of the frame 11 adjacent the rear end thereof by means of a double return pulling cable 77, one end 77 of the cable 77, Figure 3, being xedly secured to the frame of the block 76. The cable 77 extends about the double pulley and sheave blocks 74 and 76 and then is received over the lowermost sheave 71k.` of the sheave block 71, thence over a pulley 76' supported by the front end bar 17, thence over a pulley 78 also supported on the front bar 17, thence over a pulley 6 also supported on the bar 17, and thence forwardly for connection to a power cable actuating drum carried by the tractor.

For moving the pusher plate away from the closed end of the bowl 12, the cable 77 is tensioned by the power cable actuating means, causing the movable sheave block 74 to move toward the fixed sheave block 76, and with such movement the sheave 72 is correspondingly moved to exert a tensioning or pulling upon the cable 77 and movement of the pusher plate away from the closed end of the bowl. Longitudinal movement of the pusher plate 15 toward the closed end of the bowl 12, is caused by the dirt pressing against the front face of the plate upon forward movement of the tractor, resulting in paying out of the cable 77 and consequent movement of the movable sheave block 74 away from the fixed sheave block 76.

The upper longitudinal edges of the side walls 16 of the frame 11 are formed with longitudinally-extending grooves or guide channels 79 extending for a portion of the length thereof. The loading member 14 is engaged in the confronting channels or guide members 79 and is slidable along the length of the frame 11. The loading member 14 is formed with a transverse plate or carriage 80 having longitudinally-spaced-apart rollers 81 rotatably supported on the opposite longitudinal edges thereof. The rollers 81 are engageable in the channels or guide means 79 for slidably supporting the carriage 80 between the side walls 16. A scraper blade 82 is slidably supported below the carriage 80 for vertical sliding movement therein. A pair of upwardly-extending supporting members 84 are fixed on the rear side of the scraper blade 82 and extend upwardly through a pair of transverselyspaced-apart guide members 85 depending from the lower side of the carriage 80.

The bearing members 85 are formed as depending tubular bodies 86having confronting rollers 87 rotatably supported therein at the upper and lower ends thereof, the upper rollers 87 being disposed substantially in the same plane as the carriage 80. The upwardly-extending supporting arms 84 are extended through the bearing members 85 and in engagement with the rollers 87 which suitably support the members 84 for vertical sliding movement in the carriage 80. A dash pot or shock absorbing member 88 projects vertically from the carriage 80 inwardly of each of the supporting members 84, and the member 88 is engaged by a complemental inwardly extending arm or lug 89 xed on the inner side of each of the supporting members 84 for limiting the downward sliding movement of the scraper blade 82. The engagement of the lug 89 with the dashpot or shock absorbing member 88 will suitably absorb the shock of the sudden dropping of the scraper blade 82 on the carriage 80.

For sliding the loading member 14, including the carriage 80 and scraper blade 82, rearwardly along the length of the frame 11 and the bowl 12,l a cable 90 is connected at one end, Figures 3A and 2B, as at 90 to the front end of the carriage 80 adjacent one side edge thereof, the cable extending rearwardly along one of the side walls 16 of the frame 11 and being trained over a guide pulley 91 xedly mounted on the rear frame means 18 adjacent the side edge complemental to said one side wall 16 of the frame 11, thence over a guide pulley 92 xedly mounted on the rear frame means 18 adjacent to and spaced inwardly of the other side wall 16 of the frame 11, thence over a movable sheave 93 positioned along the other side wall 16 'of the frame 11, thence over a guide pulley 94 xedly mounted on the rear frame means 18 adjacent to and spaced outwardly of the guide pulley 92, and thence extending forwardly along the other of the side wall 16 of the frame 11', with the other end of the cable 90 being anchored as at 90' to the front edge of the carriage 80 adjacent the other side edge thereof. A pulling cable 95 has one end connected to the movable sheave 93, the cable extending forwardly along the other of the side walls 16 of the frame 11, thence over a pulley 96 fixedly mounted on the front end bar 17 adjacent said other side wall 16, thence over a pulley 97 also xedly mounted on the front end bar 17, thence over a pulley 98 also xedly mounted on the front end bar 17, thenceover a pulley 7 likewise xedly mounted on the front end bar 17 and thence forwardly for connection with a winding drum or other' actuating means carried by the tractor.

For controlling the extent of the rearward movement of the carriage 80 and the scraper blade 82 carried thereby toward the closed end of the bowl 12, cooperating stop means on the carriage 18 and the frame 11 is provided. Such means comprises a cable 101 which has one end anchored as at 102 to the one side wall 16 of the frame 11 adjacent the rear end of the frame means 18, the cable being trained about a pulley 104 carried by block 103 slidable along the top of said one side wall 16 of the frame 11, thence over a pulley 105 xedly mounted on said one side wall 16, thence extending forwardly along said one side wall 16 and underneath the bight of an inverted U-shaped bracket 106 projecting rlaterally from the side of the carriage 80 adjacent said one side wall 16 of the frame 11 and over a pulley 107 fixedly mounted on the front end bar 17 adjacent said one side wall 16, thence over a pulley 108 ixedly mounted on the front end bar 17, thence forwardly and over a pulley 109, thence over a pulley 110, and thence to a control lever 99 which is operatively connected to the winding drum for the cable 95, the other end of the cable 101 being connected to the lever 99. The lever 99 has one end in engagement with the cam member 100 which is xed to the tractor. The lever 99 in the position shown in Figure 2B, holds the winding drum for the cable 95 against rotation. It is to be noted that the inverted U-shaped bracket 106 has one leg secured to the top of the carriage 80 and has the free end of the y other leg provided with a roller 106', Figure 3A, the

purpose of which will subsequently be described. An actuating cable 111 has one end connected to the slidable block 103, the cable extending forwardly along the one side wall 16 of the frame 11 and over a pulley 112 xedly mounted on the front end bar 17 adjacent the one side wall 16 of the frame 11, thence over a pulley 113 also xedly mounted on the bar 17, thence over a pulley 114, thence over a pulley 115, and thence wound around a rotatable drum 116. The drum 116 is formed with a ratchet 117 at the lower end thereof, and a pawl 118 is in engagement with the ratchet 117.

To move the carriage and the scraper blade 82 carried thereby backwardly toward the closed end of the bowl 12, the slidable block 103 is first set at the desired position with respect to the rear end means 18 of the frame 11 by manually moving and holding the pawl 118 out of engagement with the ratchet 117 and then rotating the drum 116 in the proper direction to effect the desired movement of the block 103 relative to the means 18, whereupon the rotation of the drum 116 is stopped and the pawl 118 caused to engage the ratchet 117. The lever 99 is then manually swung, so that the end is out of engagement with the cam member 100, releasing the winding drum for the pulling cable 95. The winding drum for the pulling cable is then actuated to wind the cable 95 thereon, resulting in movement of the movable sheave 93 away from the xed pulleys 92 and 94 and consequent movement of the carriage 80 and the scraper blade 82 backwardly toward the closed end of the bowl 12. The backward movement of the carriage and scraper blade in response to the winding of the cable 95 simultaneously causes the roller 106' of the bracket 106 on the carriage 80 to ride along the cable 111 until the roller 106 reaches the block 103 and finally bears against the portion of the cable 101 intermediate the

pulleys

104 and 105. At this point the rotation of the winding drum for the cable 95 is stopped, and the lever 99 again shifted to its position so that the end engages the cam member to thereby lock the drum for the cable 95 against rotation.

Means for effecting the vertical up and down movement of the scraper blade 82-eomprises, Figures 3A and 3B,

cable which has one end anchored to the scraper` blade 82 at substantially the top central portion as indicated bythe numeral 131, the cableextending upwardly and .over a pulley 132 xedly mounted on the carriage 80, thence over a pulley 133 xedly mounted on the front end bar 17 of the frame 11, thence downwardly and over a pulley 134, and thence forwardly for connection with the winding drum or other actuating means.

carried by the tractor.

To move the scraper blade 82 vertically upwardly thev cable 130 is wound upon its drum, resulting in the blade :beingmoved upwardly. The winding of the cable 130 on its drurnK ist continued until the dashpots 8S engage. the lugs S9, whereupon the winding is stopped` Payingy out. of the cable 130 results in the vertical downward movement of the scraper blade 82. By limiting. the for-` ward movement of the carriage' 80 and the scraper blade 82 carried thereby, there is provided a stopl means whichA is actuated by contact with the carriage 80 upon being moved forwardly under the positive forward movement of the pusher plate 15 to stop the` forward movement of the carriage. Such stop means comprises, Figures 3A and 3C, a cable 140 which has one end secured to the lower end of an upstanding. lever 141, the lever being pivotally' connected intermediate its ends as atv 141 on the` other of the side walls 16 of the frame 11 adjacent the front end bar 17. The cable extends forwardly along said: other of the side walls 16 of the frame 11 and over ai pulley 142 xedly mounted on the front end bar 1.7, thence over a pulley 143 also tixedly mounted on the bar 17, thence over a pulley 144, thence over a pulley 14S and thence forwardly with the other end connected to a lever 146, the lever` controlling the actuation of the winding drum for the cable 68.

Forward movement of the carriage Si) and the scraper blade 82 carried thereby is caused by the positive movement of the pusher plate 15 away from the closed end of the bowl 12, the dirt in the front of the pusher plate bearing against the front face of the scraper blade 82, resulting in the corresponding forward movement of the carriage 8l). When the forward edge of the carriage S engages the upper end portion of the lever 141,- this movement actuates the cable 14d and causes the lever 146 to shift to the position to stop the rotation of the winding drum for the cable 68.

In the use and operation of the excavating and hauling machine 10 described above, for initially loading the bowl 12, with the pusher plate positioned within. the bowl 12 adjacent the open end thereof the scraper blade 82 will be lifted above the surface of the bottom wall 26 of the bowl 12 and positioned forwardly therefrom. The forward end of the bowl 12 is then lowered so that the scraper blade 27 will be positioned in scraping `engagement with the surface over which the machine 1t) is being. drawn. The scraping engagement of the blade 27 will load the forward edge of the bowl or bucket 12 with dirt which bears against and pushes the pusher plate backwardly toward the closed end of the bowl andy when a suitable supply has been deposited on the forward end of the bottom wall 26, the scraper blade 82 isf lowered, the lever 99 actuated to release it from the cam member 100, and the winding drum for the cable 95 actuated to cause the carriage to move backwardly against the dirt within the bowl until the pusher plate 15 abutst against the closed end or rear wall. 25 of the bowl 12. The scraper blade 82 may then be lifted and moved backwardly for further depositing of' dirt on the forward end of the bottom wall 26 as often as necessary to completely load the bowl. The scraper-blade S2 may be raised upwardly during the rearward sliding movement of the' carriage 80 for suitably positioning the dirt high on the rea-r end of the bowl 12 and high in the bowl along the length thereof.

When the bowl 12 is suitably loaded, the scraper blade 82 may be lowered into engagement with the scraper blade 27 or forward edge of the bottom wall 26, whereby' the scraper blade 82 will constitute a forward wall for the bowl 12 for restrain-ing the' load therein as the eX- cavating machine lll is moved to a point of unloading.

During the movement of the carriagel 80 and the scraper blade 82 carried thereby the longitudinal sliding movement is suitably controlled by the limiting cooperating: sllijde block 103 and bracket lilo, and lever 141, described a ove.

For unloading the excavating and hauling machine 10,. the scraper blade 82 is initially raised upwardly outl of engagement with the scraper blade 27 and' forward edgeofthe bottom wall 26 and the rear end of the bowl 12v may be lifted by the actuating cable 3%. A pair of rearwardly-extending supporting arms 120 are xed on the rear wall of the bowl 12 and extend rearwardly and upwardly from the lower end thereof. Rollers 121 are rotatably supported on the extreme rear ends of the supporting bars or arms 120 and are 'rotatably engaged in upwardly and forwardly-extending guide channels or rails 122 which are xed between the upper andlower portions of the rear frame member 18. The rollers 1.21

are' suitably formed or dispo-sed in engagement with the guide channels` 122 tcr provide: for the upward extension of either side of the'.` howl 12 andl the engagement of the rollers in the guide channels 122 will restrain the bowl 12 against. forward or transverse sliding movement inv the supporting frame 11. The rollers 121 may be suitably formed or provided with sufficient clearance to provide for the lifting of the rear end of the bowl 12 without restrictive engagement with the guide channels 122.

With the rear end of the bowl 12 lifted to any desired height and' wtih the scraper blade S2 moved upwardly out of engagement withl the forward edge of the bowl 12,. the unloading` member 15: is moved forwardly by the actuating` cable 63 for moving the dirt forwardly through the forward open end of the bucket or bowl 12.

For stabilizing the bucket 12 during its vertical movement in the frame 11, rollers 124 are rotatably mounted on. the exterior faces of the side wal-ls 24 of the bucket and engage the inside surface of the side frame members 16.

I do not mean to' confine myself to the exact details of construction herein disclosed, but cla-im all variations falling within the purview of the appended claims.

I claim:

l4 A device for excavating and transporting dirt compris'ing a mobile frame adapted to travel along a ground surface, a horizontally disposed bowl having one end open and the other end closed arranged longitudinally of and within said frame and mounted onsaid frame for vertical up-and-'down movement and for longitudinal vertical tilting movement from its horizontal position, means exteriorly' of and operatively connected to each end of said bowl for independently effecting the longitudinal vertical tilting movement of said bowl from itshorizontal position, a carriage mounted on said frame for longitudinal backward and forward movement, a scraper blade positioned transversely of and` within said bowl and dependingly connected to said carriage for vertical up-anddown` movement and movable through the open end of said bowl toward and away from the closed end of said bowl upon execution. of the backward and forward movement of said carriage, means carried by said carriage and operatively connected to said scraper blade for effecting the vertical up-and-down movement of the latter, and a pusher plate arranged tranversely of and within said bowl and mounted on said bowl for longitudinal movement toward and away from the closed end of said bowl.

2. A deviceV for excavating and transporting dirt comprising a mobile frame adapted for travel along a ground surface, a horizontally disposed bowl having one end open and the otherY end closed arranged longitudinally of and within said frame and mounted on said frame for vertical up-and-down movement and for longitudinal vertical tilting movement from its horizontal position, means exteriorly of and operatively connected to each end of said `bowl for independently effecting longitudinal vertical tilting movement of said bowl from its horizontal position, a carriage mounted on said frame for longitudinal backward and forward movement, a scraper blade positioned transversely of and within said bowl and dependingly connected to said carriage for vertical up-and-down movement and movable through the open end of saidbowl toward and away from the closed end of said bowl upon execution of the backward and forward movement` of said carriage, means carried by said carriage and operatively connected to said scraper blade for effecting the vertical up-and-d'own movement of the latter, a pusher plate arranged transversely of and iwthin said bowl and mounted on said bowl for longitudinal movement toward and' away from the closed end of said bowl, and means exteriorly of the closed' end of said bowl and engageable with the adjacent portion of said frame for holding the bowl against longitudinal movement with respect to said frame.

3. The device according to claim l including in addition cooperating stop means on said frame and said carriage Afor controlling the extent of the backward movement of said carriage.

4. The device according to claim l including in addition stop means on said frame for limiting the forward movement of said carriage.

(References on following page) f 9 References Cited in the le of this patent Number UNITED STATES PATENTS Number Name Date 2,275,601 818,140 Barker Apr. 17, 1906 5 2,363,178 855,336 Randall May 28, 1907 2,420,319 1,863,961 Ball et al June 21, 1932 2,528,550 1,891,266 Le Tourneau Dec. 20, 1932 2,548,754 1,963,665 Le Tourneau June 19, 1934 2,573,720

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