US2940623A

US2940623A - Material handling and earth moving apparatus

Info

Publication number: US2940623A
Application number: US638314A
Authority: US
Inventors: William M Shook
Original assignee: Warner and Swasey Co
Current assignee: Warner and Swasey Co
Priority date: 1957-02-05
Filing date: 1957-02-05
Publication date: 1960-06-14
Anticipated expiration: 1977-06-14
Also published as: GB822256A; DE1171829B

Description

June 14, 1960 w. M. SHOOK MATERIAL HANDLING AND EARTH MOVING APPARATUS Filed Feb. 5. 1957 5 Sheets-Sheet 1 INVENTOR. W/LL lHM SHooK June 14, 1960 w. M. SHOOK MATERIAL HANDLING AND EARTH MOVING APPARATUS Filed Feb. 5, 1957 5 Sheets-Sheet 2 INVENTOR. W/LL/n/w M. Sf/00K BY firrznelvsys June 14, 1960 w. M. SHOOK 2,940,623

no EARTH MOVING APPARATUS MATERIAL HANDLING A Filed Feb. 5, 1957 5 Sheets-Sheet 3 June 14, 1960 w, s ooK 2,940,623

MATERIAL HANDLING AND EARTH MOVING APPARATUS 5 Sheets-Sheet 4 Filed Feb. 5, 1957 INVENTOR. W/LL/HM M. $900K BY I ATrOR/VEJS June 14, 1960 w. M. SHOOK 2,940,623

MATERIAL HANDLING AND EARTH MOVING APPARATUS Filed Feb. 5, 1957 5 Sheets-Sheet 5 WILL/AM M. -S/1'00K flrroemsys MATERIAL HANDLING AND EARTH MOVING APPARATUS William M. Shook, New Philadelphia, Ohio, assignor to The Warner & Swasey Company, Cleveland, Ohio, a corporation of Ohio Filed Feb. 5, 1957, Ser. No. 638,314

14 Claims. (Cl. 214-141) This invention relates to a material handling and earth moving apparatus of the type employing a longitudinally extensible telescoping boom having an inner boom member and an extensible and retractable outer boom member mounting on its outer end a suitable tool for performing trenching, digging, grading and other earth moving operations or for performing material handling operations.

More particularly the invention relates to means for tilting or rocking the tool at the outer end of the boom about an axis extending longitudinally of the boom.

An object of the invention is to provide an improved and novel mechanism for tilting or rocking the tool carried by the outer end of the boom about an axis extending longitudinally of the boom and which mechanism is of such character as to be simple .in construction and eiiicient in operation and eliminates the expensive arrangements heretofore used for turning the boom bodily about its longitudinal axis.

Another object of the invention is to provide a mechanism for tilting or rocking the tool carried by the outer end of the boom of a material handling and earth moving apparatus about the longitudinal axis of the boom independently of turning the boom itself on an axis extending longitudinally thereof.

A further object is to provide a mechanism. for tilting or rocking the tool as referred to above and which mechanism is carried by the boom and imparts tilting or rocking movements to the tool independently of any rotating or rocking movement of the boom on its longitudinal axis and is substantially entirely housed within the boom.

A still further object is to provide a mechanism for tilting or rocking the tool carried by the outer .end of ited States Pat the boom in opposite directions about an axis extending the tilting or rocking movement to the tool without rotat- I ing the telescoping members of the boom on their longitudinal axis.

A still further object is to provide a mechanism for tilting or rocking the tool at the outer end of the boom as referred to above, and a part of which mechanism mounts and houses the power means for swinging the tool about an axis extending transversely to the longitudinal axis of the boom.

Further and additional objects and advantages not herein specified will become apparent hereinafter during the detailed description which is to follow of several embodiments of the invention which are illustrated in the accompanying drawings forming a part of this specification and wherein,

Fig. 1 is a side elevational view of a material handling and earth moving apparatus having a telescoping boom equipped with the invention, the raised position of the telescoping boom being indicated by dash and dot lines;

Fig. 2 is a top plan view of the material handling and earth moving apparatus shown in Fig. 1 but is on a smaller scale than Fig. 1 and with the extensible and retractable member of the telescoping boom broken off inwardly of its outer end;

Fig. 3 is a longitudinal sectional view through the extensible and retractable outer member of the telescoping boom and illustrates one form of construction embodying the invention;

Fig. 4 is an end view taken looking toward the right hand end of Fig. 3;

Fig. 5 is a transverse sectional view taken substantially on line 55 of Fig. 3 looking in the direction of the arrows;

Fig. 6 is a transverse sectional View taken substantially on line 6-6 of Fig. 1 looking in the direction of the arrows and shows in elevation the end plate on the inner end of an extension unit that may be bolted to the end plate on the outer end of the extensible and retractable outer member of the telescoping boom;

Fig. 7 is a view similar to Fig. 3 but illustrates a modified form of construction embodying the invention from that shown in Fig. 3;

Fig. 8 is a transverse sectional view taken substantially on line 88 of Fig. 7 looking in the direction of the arrows and on a larger scale;

Fig. 9 is a longitudinal sectional view similar to Figs. 3 and 7 but showing a further modified form of the con struction embodying the invention, with the extension unit that is secured to the outer end of the extensible and retractable outer boom member being broken away at longitudinally spaced points to shorten the figure; and

Fig. 10 is a view similar to Fig. 9 but illustrating a still different form of construction embodying the invention than is shown in any .of the preceding views.

The invention may be used advantageously in,various types of booms in material handling apparatus or in earth moving apparatus, but for purposes of illustration and without limitation thereto, it will be described herein as used in a material handling and earth moving apparatus of the type having a telescoping boom, since it has particular utility when so used.

The apparatus illustrated in the drawings, and particularly in Figs. 1 and 2, is of the general type of apparatus shown and described in Oldenkamp Patent No. 2,684,159, issued July 20, 1954. This type of material handling and earth moving apparatus is a multipurpose one and comprises a supporting platform which, in this instance, is illustrated as mounted upon a vehicle chassis. The platform 15 has mounted on it a turntable 16 movable on a vertical axis to any angular position. The turntable 16 mounts an operators cab 17 arranged on a supporting frame 18. The frame 18 pivotally mounts on a horizontal axis a pair of supporting brackets 19 spaced transversely of the frame 18 at one side of the cab 17.

The pivoted supporting brackets 19 are secured to the inner member 20 of the telescoping boom. The piston rods 21 of a pair of pressure fluid cylinders 22 are pivotally connected to the brackets 19 while said cylinders are piovtally connected to the supporting frame 18.

It will be seen that the boom can be swung with the turntable 16 about a vertical axis and also in a vertical plane about the horizontal axis of the pivotal connections of the supporting brackets 19 through the actuation of the piston rods 21. Y

The boom also includes an outer extensible and retractable boom member 23 which telescopes in the inner boom member 20. The outer boom member 23 is extended and retracted relative to the inner boom member 29 by suitable power means, not shown, and carried by the boom member.

A power plant 24 is carried by the supporting frame 18 and provides the pressure fluid supply for the cylinders 22, the means in the boom for extending and retracting the outer boom member, for the turntable 16 and for .the pressure fluid devices hereinafter to be described and carried by the boom. Suitable controls for the pressure fluid power devices may be located conveniently for the opera tor;in the'operators cab 17. The details of construction hereinbefore briefly described need not be ex- 7 at and within the circumference of said opening asplit boom or extension unit structure.

Fig. l as a drag bucket it will be understood it could be any other suitable tool.

An end plate 39 is rigidly secured to the inner end of the sleeve 31 by any suitable means, although this end plate is illustrated herein as welded to the inner end of O plained in greater extent,.inasmuc h as they do not form the sleeve 31. The end plate 39 within the sleeve 31 per se any part of thepresent invention. Q. f is provided with supporting brackets 40 to which is piv- Q I In the construction shown in the hereinbefore referred otally connected one end .of a pressure'fluid cylinder 41 to Oldenkamp Patent 2,684,159 theinner boom member of a power device. This cylinder slidably mounts within is illustrated as mounted for rotative bodily movement on 10 it a piston attached to a'piston rod 42 extending outits longitudinal axis in a circular housing or. cradle wardly of the opposite end of the cylinder and through -which, in turn, is mounted by trunnions engaging in supthe opening 35 in the supporting plate 33. The outer ;ports extending upwardlyfrom the frame for swinging end of the piston rod 42 is adapted to be pivotally conorrocking movement about a horizontal axis to Qswing nected to'- the tool 38 so that movement of said piston -the boom in a verticalplane. v rod effects swinging of the tool about the axis of its pivot The apparatus shown in Figs. 1 and 2 hereof does not 37 as will be well understood in the art. It will be underinclude the circular housing or cradle just referred to or stood that the cylinder 41 is suitably connected in a presany power means for bodily rotating the boom on its sure fluid circuitthat includes a suitable control valve longitudinal axis, since the present invention eliminates in the operators cab 17.

the necessity of rotating the boom on its longitudinal The end plate 39' is provided with a central opening axis in order to tilt or rock the tool mounted on the which interfits the shouldered reduced end of a connectouter end of the boom about said longitudinal axis. ing shaft 43 that is rigidly connected to the plate 39 by It will be understood that the boom embodying the suitable means as, for insta y Weldihg- The invention can 'be. swung in a vertical plane about a nectingsh aft 43 is rotatably supported in a ball type horizontal axis and moved'in a horizontal plane about the joint and bearing arrangement to be described in detail vertical axis of the turntable 16 and alsothat the outer and which Provides for e thrust of t e e e 3 r boom member 23 can be extended and retracted relative and for any misa ig ment between .the sleeve and the [to the inner boom member 20,2111 by suitable power shaft or spindle of the actuating motor later 'to be demeans controlled by the operator. r bed l a 5 The boom members preferably are triangular in cross The actuating motor. is indicated at 44 and for illussection and the construction of the inner boom member trative purposes Will be described herein as a pressure p 20 as well as the construction of the outer boom member fluid motor, the rotor which can he. filmed through a g 23 may be substantiall th s m as d ib d i id predetermined anglerin opposite directions. A two-piece Oldenkamp Patent 2,684,159. v bearing support 45 formed of separable upper and lower The outer .boom member 23 has at its three corners 'members'is rigidly bolted to the end of the housing of longitudinally extending t b laf supports 25 d th the motor 44 and is provided with arcuate convex or have secur'ed threto by weldingor other suitable means M spherical portions. indicated a 45a; The two-Piece bear- "p1ates26; f v 7 V ing support 45'is provided in the inner circumference Although the me hanism cmbqdying the i venti m y of the spherical portions 45a with'an'annular groove and I be mounted directly in the outer memb 23, 'it i mm. recesses that receive two axially spaced split or two-piece trated and will be described herein as mounted in an 'Fshaped hearing bushings Separated. y two-Piece "extension unit 23a which with said mechanism canbe s nsfl 1 1 secured at the outerend ofthe'on ter boom member 23. h connecting. f 'i iS Jotatahle i h pp The extension unit 23a is constructed similarly to the 145731143 P oh its circumference h 31173111111131 boom member 23, that is, it is formed with tubular longi- 'l h y ihteffits the bushings 45 a ring fi a l extending ports 25at its corners'and with side 4. 5 cohhectihg Shaft is Provided With ah axial plates 26. v L bore receiving the shaft or spindle 48 'of the motor The inner end of the extension unit 23a mounts an ,atafldisaid connegting. shaft 43 and-spindle are keyed taching plate 27 that is rigidly bolted to an attaching Imgetheh Y I plate 28 on the outer end of the outer boom member 23, Thh Spherical Convex 1 9 0f lower se g 1 and 5 V V member of the two piece bearing support 45 fits within a l The outer end of the outer boom member 23 or the I l hl hhhcave PP .TeCeSS o med in a outer end of thee'xten sion unit 23a, as the case might be, suppomngqadle' (hails ,Iigidly mounted in the te h rigidly Secured to it a supporting plate The p boom member 23 or in the extension unit 23a as the case porting plate is provided with an opening and supports may The cradle. 49 may be secured in Position by any suitable means as; for instance, by welding it to the A hearing bushing indicated generally at 30. A;sleeve-31 extends through the bearing bushing 30 and is provided on its circumference with a wear or bearing sleeve .32

rotatable in therbushing 30, said wear sleeve 32 being rigidly secured to the sleeve 31 by welding or any other suitable means. The major part of the sleeve 31 is lo- 5 cated interiorly of the outer boom member 23 or of the extension unit 23a; asthe case may be. The outer end of the sleeve 31 beyond the bearing bushing 30 has fixed to it. a supporting plate 33 which on its 'outer'side' has The upper convex or spherical portion 45a of the upper member ofthe two-piece bearing support 45 is located insubstantially complementary concave recesses provided in a'cap member 50. v The cap member 50 can be boltedorclamped to the cradle 49 by suitable screws 51. it will be understood that the. connecting. shaft 43 can be mounted. oniand keyed to the motor'spindle 48 and within the bearing support 45 since said bearing support is 'formed of separate, upper and;lower members. Also,

-ets 34.

:fixedthereto downwardly extending parallel hinge brack- The supporting plate 33 is'provided with opening '35 communicating with the interior of the sleeve 31 while the hinge brackets 34 are provided with aligned it willpbe recalled that to facilitate assembly the T-shaped bearing bushings 46 are each formed in separate upper and lowerpieces as-is likewise the spacing ring 47. Hence can" be readily assembled. i 1:

'openings'36 in which latter openings the pivot 37 of a 7 suitable tool 38 ismounted so the tool can swing about 75..

V It be observedthat the cap 50 need notibe clamped in position until proper alignment exists between the motor 44 and sleeve .31 and'in order to get this alignment the astq nbsus a tt nd. mm tim t9 t e. b l

O joint, can be turned relative to the cradle 49 and cap 50 until a proper aligned position exists between spindle 48, connecting shaft 43 and sleeve 31, after which the cap 50 can be clamped down by the screws 51. Also it will be noted that adequate provision is made for taking any end thrust of the sleeve 31 on the connecting shaft 43.

It will be seen that the sleeve 31 can be rocked in opposite directions or rotated on an axis extending'longitudinally of the boom by actuation of the motor 44 and that such rocking of the sleeve 31 will correspondingly rock or rotate the supporting plate 33 to rock or tilt in opposite directions the tool 38 carried by the hinged brackets 34, such rocking or tilting of the tool being about an axis extending longitudinally of the boom. Consequently in a construction embodying the invention it is not necessary to rotate either member of the boom and thus it is not necessary to mount the boom in a rotatable support or cradle which necessarily would be massive and would increase the weight of the apparatus as well as its cost. Also, the construction embodying the invention can use a smaller power device to tilt the tool, since the boom is not rocked bodily to produce the tilting action.

It will be seen that the present invention embodies an arrangement that is contained within the boom and rocks or tilts the tool in opposite directions about an axis extending longitudinally of the boom without imparting any rotating or rocking movement to the boom itself.

It will also be noted that the power means for swinging the tool about the axis of its pivot 37 which extends transversely to the longitudinal axis of the boom is housed within the mechanism for tilting or rocking the tool about said longitudinal axis of the boom.

A construction embodying the present invention provides for all the necessary movements of the boom and of the tool but eliminates the costly arrangement of rocking or rotating the boom itself bodily about its longitudinal axis to produce the tool tilting movement. Hence the present invention accomplishes the desired result of simplifying the construction of the material handling and earth moving apparatus, reducing its weight and enabling it to be more economically manufactured. In addition, it removes from the supporting platform of the apparatus the bulky and space consuming rockable cradle or support for the boom.

In Figs. 7 and 8 a modified form of construction embodying the invention from that shown in Figs. 1 to 6 inclusive is illustrated and will now be described. This modified form of construction difiers from the previously described construction in the type of actuating motor employed and in the manner in which said actuating motor is connected to the connecting shaft that, in turn, is connected to the end plate 39 of the sleeve 31. Insofar as the parts of the construction shown in Figs. 7 and 8 are identical with corresponding parts in the previously described construction the same reference numerals are used in Figs. 7 and 8, and it will be unnecessary to repeat the detailed description of these parts.

In the construction shown in Figs. 7 and 8 the connecting shaft corresponding to the previously described connecting shaft 43 is indicated at 52. The connecting shaft 52 is provided with a shouldered reduced end that is rigidly connected to the end plate 39 in the manner previously described. The comecting shaft 52 is rotatable in a ball type caring joint similar to the previously described construction, but wherein the bearing support 45 is eliminated and only the upper and lower spherical portions 45a thereof are used.

The extension unit 2341 mounts a pair of motor supporting brackets 53 spaced longitudinally of the unit. The brackets 53 have a portion which interfits the upper tubular support 25 and another portion which extends downwardly on the outer side of a side plate 26 of the extension unit. The supporting brackets 53 are provided with semi-circular bearing recesses 54 which receive the trunnions 55 extending from diametrically opposite sides of the housing of an actuating motor 56. Cap members 57 are clamped by suitable clamping screws to the supporting brackets 53 and are provided with semi-circular bearing recesses interfitting the trunnions 55., wherefore said cap members 57 hold the trunnions rockable in position in the supporting brackets 53.

The actuating motor 56 is of the reciprocating pressure fluid type and has a piston rod 58 extending from the motor housing and into the interior of the extension unit 23a. The connecting shaft 52 at its free end is provided with a crank 59 to which the outer end of the piston rod 58 .is pivotally connected by a crank pin 60.

It willbe seen that reciprocation of the piston rod 58 moves the crank arm through a predetermined angle in one or the other direction and that this results in rocking in opposite directions the sleeve 31 and tiltingin opposite directions the tool carried by the supporting plate 33 about an axis extending longitudinally of the boom.

In Fig. '9 there is illustrated a further form of construction embodying the invention but differing from the construction already described. In this further form of construction the supporting plate 33, split bearing bush ing 39, sleeve 31, hinge brackets 34, pressure fluid cylinder 41 and piston rod 42 are the same as in the previously described forms and hence a detailed description thereof need not be repeated.

The construction shown in Fig. 9 is adapted to be mounted in the extension unit 23a for the outer boom member 23. In this modified form of construction the end plate 39 of the previously described forms is replaced by an end plate 61 fixed to the inner end of the sleeve 31 and provided with an integral tubular coupling member 62. This member 62 intermediate its ends and on its circumference is provided with a spherical bearing portion 63 which is rotatable in two-piece axially spaced bearing bushings 64 that are interposed between the portion 63 and a bearing support 65 fixedly mounted in the extension unit 23a and a cap member 66 that is clamped to the bearing support 65 by suitable screws 67. The ball type thrust bearing is provided for the member 62 to compensate for any misalignment and to take the end thrust of the sleeve 31.

The coupling member 62 interfits a connecting shaft 68 and is keyed thereto. The connecting shaft 68 is rigidly connected, as by welding, to one end of a short sleeve 69, the opposite end of which is rigidly connected, as by welding, to a tubular connecting member 70 that is keyed to the shaft or spindle 71 projecting from one end of the housing of an actuating motor 72. The other end of the housing of said actuating motor is mounted in and supported by the attaching plate 27 of the extension unit 23a of the outer boom member 23. V

The actuating motor 72 preferably is of the pressure fluid type and such that its rotor can turn through a predetermined angle in opposite directions to impart through the member 70, short sleeve 69, connecting shaft 68 and tubular sleeve 62 rocking or turning movements in opposite directions to the sleeve 31- and tilting movement to the tool mounted in the hinge brackets 34 and about an axis extending longitudinally of the boom.

In Fig. 10 there is disclosed a still further modified form of construction embodying the invention. In this form of constniction the extension unit 2311 that is secured by the attaching plate 27 to the attaching plate 28 of the outer boom member 23 mounts at its outer end a radial and end thrust bearing indicated generally at 73. The cylindrical sleeve 31 is supplanted in the form of construction shown in Fig. 10 by a sleeve formed at one end with a cylindrical portion 74 from which the sleeve has a conical portion 75 extending to the opposite end of the sleeve and imparting strength to the sleeve.

The cylindrical portion 74 has fixed on its circumference adjacent its outer end a circular bearing plate ,76 provided on its circumference with an annular groove that rotatably interfits the bearing 73 and resists radial and end thrust movement of the sleeve. The cylindrical portion 74 of the sleeve has attached to its outer end the supporting plate 33 similar to the manner in which the supporting plate 33 is attached to the previously described sleeves 31in the other forms of construction.

The conical portion .75 of the sleeve inthe construction shown inFig. has fixedly mounted therein intermediate sits ends a supporting bracket 77 similar to the supporting brackets 40 already described. The bracket 77 is pivotally connected to the end of the pressure fluid cylinder 41. .The' pistonrod 42-extending from the pressure cylinder 41 projects outwardly of the opening 35 in the supporting plate '33 as in. the previously described forms and is pivotally connected to the tool to rock or swing the same about the axis 37 that extends transversely to the longitudinal axis ofthe boom.

The inner and small end of the conical portion 75 of .thesleeve interfits theshouldered reduced end of a connecting shaft 78 and is secured to said end of said shaft by suitable means as, for instance, by being welded thereto. The connecting shaft 78 is provided with a bore which interfits the shaft or spindle 71 of the actuating motor 72 and is keyed to said shaft or spindle.

The right hand end of the housing of the actuating motor 72, as viewed in Fig. 10, is rigidly supported by the attaching plate 28 at the outer end of the outer boom .member 23. The actuating motor 72 is preferably of the pressure fluid type and is so constructed that its rotor can :turn or rock through a predetermined angle in opposite directions to impart through the sleeve rocking or tilting movements in opposite directions to the tool carried by the hinge brackets 34'and about an axis extending longitudinally of the boom.

In the form of construction shown in Fig. 10 the actuating motor can be mounted in the outer end of the outer boom member 23 with its shaft or spindle 71 extending outwardly of the outer boom member. The sleeve com- ;posed of the cylindrical portion 74 and the conical portion 75, together with the connecting shaft 78, is mounted :in the extension unit 23a and when saidunit is attached ,to the outer end of the outer boom member 23 the connecting shaft 78 can be interconnected Withthe shaft or spindle 71 of the actuating motor.

Although several embodiments of the invention have been illustrated and described herein it will be understood that the invention is susceptible of various modifications and adaptations coming within the scope of the appended claims- Having thus described my invention, I claim:

,1. In a material handling and earth moving apparatus having an extensible boom comprised of two triangular telescoping members, a tubular sleeve rotatably secured to and disposed within the outer telescoping member of said extensible boom, a supporting plate rigidly secured to the outermost end of said extensible boom member :having an opening formed therein for receiving one end of said tubular. sleeve, split bearing bushing means disposed about said outer end of said tubular sleeve rigidly secured to said supporting plate for forming a seal between said tubular sleeve and said supporting plate, the inner end of said tubular sleeve having a'shaft extension pivotally mountedin a bearing plate rigidly secured within said outer telescoping boom member, actuating fluid motor means having a driven shaft in driving connection with ,said shaft extension of said tubular sleeve, downwardly ifluidfcylinder connected to said piston and an outer end extending outwardly of said tubular sleeve, and said outer end of said piston rod being pivotally connected to said tool for the tilting thereof about the axis of said transverse p ta a a a '2. In a material handling and earth moving apparatus as set forth in claim 1, wherein said outer boorn member comprises .two boonrmembers connected together by meansof two flat and abutting attaching plates. 7

;A -material handling and earth moving apparatus comprising a support, a boom the outer end of which is adapted to mount a tool, means carried by said supplate rotating with said, member and provided with means for attaching a tool thereto to swing on an axis transverse to said boom, a motor carried by said boom, operative connections between said motor and said tubular member for rotating the latter and said tool supporting plate independently. of boom movement on an axis extending longitudinally of the boom when said motor is actuated, a supporting bracket fixed in said tubular member inwardly of the outer end thereof, and power means in said member and including a housing element and a linearly reciprocable element movable relative to said housingelement, one of said elements being pivotally connected to said supporting bracket and the other of said elements being provided with means for connecting it to a tool that is pivotally carried by said tool attaching :means on said tool supporting plate.

4. A material handling and earth moving apparatus as defined in claim 3 wherein said power means in said member is a pressure fluid motor including a cylinder ielementand a piston and piston rod element linearly re- .ciprocable in said cylinder element with one of said elements being pivotally connected to said supporting bracket and the other of said elements being provided with means for connecting it to a tool that is pivotally carried by said tool attaching means on said tool sup porting plate. r r

5. A material handling and earth moving apparatus as defined in claim 4 wherein said cylinder element is pivotally connected to said supporting bracket while said piston and piston rod element is provided with means at the free end of the piston rod for connecting'it to a tool that is pivotally carried by said tool attaching means on said tool supporting plate.

6..A material handling and earth moving apparatus as defined in claim 3 wherein said motor carried by said boom is located within the boom in axial alignment with said elongated tubular member.

7. A material handling and earth moving'apparatus as defined in claim 3 wherein said motor carried by said boom is a pressure fluid motor.

8. A. material handling and earth moving apparatus as defined in claim 7 wherein said motor carried by said boom is a pressure fluid motor of the rotary type and .is located within said boom and has its spindle substantially in axial alignment with said tubular member. v9. A material handling and earth moving apparatus as defined in claim 3 and'wherein said tubular member f is a cylinder the outer end of which has secured to it said tool'supporting plate while the inner end of the cylinder has secured to it an end plate.

10. A material handling and earth moving apparatus as defined in claim 9 wherein said operative connections between said motor and said cylinderinclude a shaft aeaaeas fixedly attached to said end plate and rotatably mounted in said other bearing.

11. A material handling and earth moving apparatus as defined in claim 10 wherein said motor carried by said boom is a rotary motor located Within the boom and having its spindle in axial alignment with said shaft.

12. A material handling and earth moving apparatus as defined in claim 3 wherein said tubular member has adjacent its outer end a cylindrical portion and inwardly thereof a conical portion the free end of which is secured to said operative connections.

13. A material handling and earth moving apparatus as defined in claim 3 wherein said motor carried by said boom is of the reciprocating type and is mounted to have its reciprocating piston rod move transversely of the boom and of said tubular member.

14. A material handling and earth moving apparatus comprising a support, a boom the outer end of which is adapted to mount a tool, means carried by said support for supporting and bodily swinging said boom horizontally and vertically about axes extending transversely to each other, an elongated tubular member Within said boom and extending longitudinally thereof and rotatably supported therein, said member extending through the outer end of the boom and having secured to its outer end a tool supporting plate rotating with said member and provided with means for attaching a tool thereto to swing on an axis transverse to said boom, a motor carrried by said boom, operative connections between said motor and said tubular member for rotating the latter and said tool supporting plate independently of boom movement on an axis extending longitudinally of the boom When said motor is actuated, a supporting bracket fixed in said tubular member inwardly of the outer end thereof, and power means in said member and including a housing element and a linearly reciprocable element movable relative to said housing element, one of said elements being pivotally connected to said supporting bracket and the other of said elements being provided with means for connecting it to a tool that is pivotally carried by said tool attaching means on said tool supporting plate.

References Cited in the file of this patent UNITED STATES PATENTS 1,028,619 Smith June 4, 1912 1,088,031 Lutz Feb. 24, 1914 1,185,427 Moore May 30, 1916 1,362,566 Fulton et a1. Dec. 14, 1920 2,541,045 Ferwerda Feb. 13, 1951 2,679,326 Isaksen May 25, 1954 2,684,159 Oldenkamp July 20, 1954 2,792,954 Westling May 21, 1957 FOREIGN PATENTS 1,080,307 France Dec. 8, 1954 1,094,800 France May 24, 1955