Патент USA US2107895код для вставки
Feb. 8, 1938. H. LUNDSTROM 2,107,895 EXCAVATOR Filed June 15, 1936 ' 3 Sheets-Sheet l \ \ \ I //YL/£/YTOB HANS Lurwsmom V m A rroe/vs v Feb. 8, 1938. ‘ H. LUNDSTROM I 2,107,895 EXCAVATOR Filed June 15, 1936 3 Sheets-Sheet 2 H ANS BY; Mme-?re)?’ LUNPSTROM Feb. 8, 1938. 2,107,895 H. LUNDSTROM EXCAVATOR Filed June 15., 1936 s sheets-sheet 5 ~ . /m/¢'/Yr02_, HANS 7/, Lu nosrlaom _ OLLL, ATTORNEY ‘Patented Feb. 1938 2,107,895 * ' UNITED STATES’ PATENT ‘OFFICE’: ‘_ 2,107,895 EXOAVAIOR ‘ Hans Lundstrom, St. Louis, Mo., usignor of two thlrds to‘ Ida. Lundstrom, and one-third to 'JosephMag/idsonahd Phelix B. Magidson, all ’ , , of _ St. Louis, Mo. Application June 15, 1936, Serial No. 85,284 .7 ~ 10 Claims. (01. 214-138) ' . invention relates broadly, to excavators, of vention appertains, from the disclosures herein given. ' ~ "thetype used by road builders,>building contrac To this end, my invention consists in the novel tors, and many others, andwell known, and has construction, arrangement and combination of ~ among its objects the production of such excava parts herein shown and described, and uses men- 5 tors that will be especially adaptable to and capa v ble of a maximum number of uses, which is easily tioned, as will be more clearly pointed out in the constructed and operated, speedy and simple in claims hereunto appended. f operation and construction, economical,‘ and otherwise satisfactory and 'emcient for use where‘ 10 ever deemed applicable. I > . The invention hasnamong' its objects, to ‘pro I duce an excavator having a dipper and a carry ing'v boom- therefor, the boombein'g telescopic in constructionand action, and the dipper being op 15: erably connected. to both the ?xed and movable parts of said telescopic boom, in such a way that ‘said dipper will have amaximumv digging radius, enablebetter'and easier dumping, and permit of very close jack-'kniiing of the dipper against said 20 .boom. ' I = I The invention hasanother object, to provide a dipper 'so mounted to said telescopic boom-that , when‘ the excavatoris not in use, it will provide greater stability and minimize any overturning , 25' tendencyof the excavator, while .at' the same time permitting the mechanism tobe of minimum height ‘to'permit of digging in places of low overhead clearance and to more easily transport the en tire 30 ‘mechanism. - ~ 4 , ' , ' .‘A further object of my invention is to provide ' means for easily and readily mounting and re ’ mounting the dipper from the boom, to permit the dipperjto be reversed so as to dig in either forward or. backward direction, ‘as required, and thereby 35, provide for maximum-useof said device. ' x-Anvadded object of‘ the invention is to provide tarnovel latch for the dippen-whereby the latter I may be securely held-in latched position against accidental dumping ‘and yet may be readily, easily and conveniently dumpedwhen required. ' A still further objectof the'invention is to pro , - Inthedrawings, wherein like reference'charac ,ters indicate like or corresponding parts through out the drawings, 10 . Figure 1 is'a side elevation of my improved ex cavator, as used for forward digging; ‘ Figure 2 is a similar view of the same, but show ing .the: dipper reversed, as usedfor back digging; . Figure 3 is a top plan view of the mechanism 15 showninFig.1; .- a, V‘ Figure 4 is a longitudinal cross-sectional detail of the dipper; ‘ Figure 5 is a transverse cross-sectional detail of the boomv parts, taken substantially on, the line 30 8-5 of Fig. 3; and : , - Figure 6 is atop plan view of the device shown m Fig, 2,'- . . . - , Referring more ,particularly to the drawings, wherein I have illustrated a preferred embodiment 25 of my invention, only a fragment of the cab, ma chinery deck or machine A is indicated, the same being of any desired or suitable construction, and generally portable, as by means of the endless conveyor I, so that it may be moved from place-to 30 place as required. ‘The deck is also generally com pletely rotatable so that a maximum of digging range may be had from each setting of the ma chine. ! indicates the gantry or other forward part of the deck, and to which the pulleys, sheaves, or other operating line carriers may be mounted. ' Instead of having a boom of fixed length on the forward end of the machine, and to which is fixed a vertically ,movable dipper stick carrying a bucket, dipper or other digging element at its low- ‘0 er end, I have provided an entirely novel and ‘vide‘means automatically operated during the functionally diii'erentstructure, as will now be de_—. I usual dumping and closing of the dipper, to clean The boom member that I employ is of telescopic "and scrape the interior of the'latter, thereby obvi construction, composed of a pair of longitudinally ating the necessity of frequent manual cleaning, extensible and contractile elements relatively of and vhence’ increasing the effective’v carrying load of‘each digging stroke of the dipper. 1 ‘Another added object of my invention is to one another, the relatively stationary element 3 being pivoted or' otherwise hinged at one end to , the forward end of said machine, so as to be mov provide a'novel hoisting and digging ‘connection able in an up and down direction, and having its £50 between, the dipper, boom and machine, that the other end'preferably upwardly projected as at 4. I" operation'jwill be sturdy, even and e?ective. ; Many other objects and advantages of the. con, struction-herein shown and described will be ob This element 3 is adapted to slidably receive the relatively movable boom element 5, and may be. of channel-shape in transverse cross-section, vvious to those skilled in the art to, whichthis in shown in ‘Fig. 5., to provide said guideways. ' ' 50 u 2 2,107,895 The relatively movable boom element 5 has its forward end projected forwardly and downwardly as at 6, said end being forwardly beyond the ad jacent end of the stationary boom element at all the digging radius of the excavations over and beyond that normally obtainable in digging op erations. ‘ i ’ . When it is desired to retrieve-the dipper, after times. dumping in a manner to be hereinafter de The digging element, such as the dipper B, is carried at the forward ends of said .boom ele scribed, a pull line P having its rear end leading into the machine and its forward end connect ments, and is detachably reversible so that it may ed to any suitable part‘ of th‘eldipper so as to be used for digging either forwardly or backward bring the latter up close against the under side ly, relatively of said machine, Fig. 2 illustrating I of the boom to start the dig, is pulled, as re 10 use as a back-digger, while the other views show quired, this retrieving of the dipper also acting its use as a forward digger. . v , This dipper may be of any suitable size and shape, as for example, composed of a pair of 15 opposed side walls 1-‘! extending substantially vertically, a rear wall or back 8, and an end the ?xed side walls 1-1, so as to open the dipper for dumping and re-closing it thereafter, the movable manner, as will be more clearly herein- ‘ control means for said movable walls not only after set forth.- Teeth 30 maybe ?xed to the " _ Said dipper is movably connected. to both of the boom elements, there being a pivot pin In between the opposed sides '|--‘| of the dipper, for pivotal engagement through the forward ends 25 of a pair of links ll‘—l i, each of said links being pivoted at its rear end to said upwardly extend ing projection; 1-4 of the stationary boom element, the axis of said pin it being substantially in the transverse median plane through said dipper. A pair of pin-receiving apertures 12 and I3 are provided through the side walls of said dipper to either side of and substantially like distances below the apertures for receiving said pin in, the - apertures l2 and I! being closely adjacent the 35 bounding edges of the front and rear of said dip per, so that either the set of apertures I! or l3 causing said opening and closing movements, but in addition making the dipper ‘self-cleaning. 20 This self-cleaning feature is especially important, not only in making for easier and more e?lclent operation of the dipper itself, but by, increasing the effective load-carrying, capacity of the dip per. The dipper is cleaned at, each‘ dumping 25 operation, thereby obviating the necessity of manual cleaning of the same. The end wall 9 is pivoted at its forward edge to said pair of sidewalls ‘|-'|,~and' the rear wall is provided with a pair of inturned ?anges 30 38, 38 of a height increasing from a. point ad jacent its lower end toone' adjacent its upper end, said ?anges being cioselyadjacent and sub stantially parallelv to the inside surfaces of said side walls. Said rear wall is pivoted intermediate its top and bottom to said pair of side walls. as may be used selectively, for mounting the dipper at I9, and a pair of link plates v204-20 voperably for forward or backward digging, as desired. link said end and rear. walls together,: each of Assuming that it is desired to mount the dipper ‘ for forward digging, as‘ shown in all the draw-~ ings, but Fig. 2, then said dipper‘is pivoted at III to the forward end of said links ll-ll, and a pin it pivotally interconnects the-downturned projections of the movable boom with said dipper 45 through the pin openings I2. Obviously, in order that the dipper may be conveniently, easily and practically reversed from time to time, for either backward or forward digging. said'pins are pref erably removably o‘r detachably inserted into 50 The dipper preferably has its end and rear walls movable relatively of one another and. of 15 wall 9, the rear and end walls cooperating in a 20 dipper at its open side, if desired. 30 to re-latch the dipper as will be more clearly hereinafter set forth. place. '1 ' a I ~ For operating the movable part of the boom in its necessary direction‘ to enable the dipper to ?ll in‘ digging,‘ I provide a control 3 :e L, one end of which is dead-ended at I! to an said link‘ plates being‘ interposed betweensaid side walls and inturned ?anges, and being pivot ally connected at one end to one of said‘ ?anges, as at 39 and at its other end to‘said end wall of the dipper, as at 40. Consequentlmlthe opening and closing of the dipper will cause ‘the link plates to substantially scrape the side walls. and 45 cause the inturned ?anges to substantially scrape'said links. ' - ' ' The latch means has a ?nger 2| pivoted to the lower end of the rear of the dipper and-movable up against the under side of the-rear edge of 50 said end wall of the dipper, to hold said end and rear walls in closed position when said ?nger is thus retained in place. A bell-crank 221s pivot ‘ ed to the upper‘end of said. movable rear wall 8, axle l6 removably connected to the upper ends a link 23 interconnecting said bell-crank with 55 said ?nger 2|‘ to actuate the two in unison, a pair of sheaves I‘I-I'l, said line their being spring 24. normally pressing said link in- the threaded through said sheaves and gantry and direction to release or unlatch said ?nger. around a loose pulley I8 adjacent the rear end of An offset 25 is ?xed to the upper end of the‘ 60 said movable boom‘ element, the other end of rear .wall of the dipper and recessed to receive said line leading into the machine, so that opera said movable bell crank 22, said oifset 25 bear. tion of this last-mentioned line end at the ma . ing against a stop 26 carriedv by a stationary chine will actuate the movable boom element part of the dipper, near the top of the'latter, said forwardly, while at the same time actuating the stop being spring-pressed to normally abut the dipper'in its digging, it being especially noted said o?'setwhen the dipper is closed, but being 65 that when the dipper is at its rearmost posi liftaHe to permit said offset to pass‘said stop tion, as shown in dotted lines in Fig. 1, said links when desired. Cam means 21 is also carried by are substantially-parallel with the‘ down-turned said part of the dipper and controlled‘by a‘ trip and forwardly projecting ‘ends 6-6 of the ?xed line 28v leading to the machine. so that actuation of the side walls of the dipper and carrying a ‘boom element, thus permitting the dipper to be brought up very close under the boom, or closely of said trip means through the line lllmoves said 70 cam to lift said stop and 98.11111‘? the load in the ' jack-knife, so that it is possible to commence the dipper to move the rear and'end walls to open digging cut from substantially that point as its rearmost point, and continue said cut forward 75 ly for a considerable distance, hence increasing position, the onset and bell crank passing said stop to permit" this action. ‘ ' After dumping, a pull on the line P will ?rst‘ . - actuate the open walls to closed position and re set the latch, and continued pull will retrieve thedipper to next digging position. In order to accomplish this result, the forward end of the line P may be loosely threaded through an eye ‘I secured to the movable wall 8 a‘ short dis tance above the pivotal axis i8, before being se cured to said pivotal axis. 3 9,107,895 Hence, after the be brought up very close under the boom, said dipper beingiconnected directly to the boom and not through the usual intermediary of a dipper stick. Having thus described my invention, it is obvi ous immaterial modi?cations may be made in the same without departing from the spirit of my in~ vention; hence I do'not wish to be understood as dipper has been tripped, and the rear wall is in 10 the position shown in dotted lines in Fig. 4, a pull on the rope P will pull the rear wall at ‘the eye-bolt, tending to turn the rear wall about limiting myself to the exact form, arrangement, construction and combination of parts herein said'pivotal axis i9, ‘and closing the dipper; Thus, it is seen that by actuating they control 15 line L will telescopically extend the overall length invention appertains and the claims hereunto ap of the boom, while at the same time pivoting the ‘dipper ‘about both ofv its pivotal connections to the boom elements, until the end of the cutting or digging stroke, whereupon the dipper may then 20 be directed in proper position for dumping its shown and described, or the uses claimed, except as limited by the state of the art to which this pended. ‘ ‘ 'What I "claim as new and desire to secure‘by 15 Letters Patent is: - 1. In an excavating machine, a pair of rela tively movable boom members, a reversible dipper, .a link having one end pivoted to the end of ‘one of said boom members and the other end pivoted 20 detachably to said dipper, and means for‘pivotal 1y connecting the adjacent end of the other boom member selectively to said dipper at a pair of spaced points beneath the pivoting point of the charge of load. The retrieving line P is now . dipper and link, whereby said dipper may be re 25 pulled, the initial pull re-latching the dipper, and versed to dig either forwardly or backwardly. 2. In ‘an excavating machine, a pair of rela-' ' further pull swinging the dipper back to its origi tively movable boom members, a dipper, a link nal position for the next dig?forwardly. For many‘digging operati‘iit'ns it is desirable that (having one end pivoted to the end of said mova ao' the dipper be actuated toward the machine or ’ble boom member, detachable means for pivotally 30 backwardly to ?ll, and in my device it~is quite easy connecting said dipper to the other end of said link, means for selectively pivotally connecting I to change the dipper so that it may dig‘ either for wardly or backwardly, this change being effected the adjacent end of the other boom member to said dipper at either of a pair of spaced points simply through the removal of several pivotal con nections holding the dipper in place, and then beneath said pivotal point of the dipper and link, replacing said pivotal connections in a manner whereby said dipper may be reversed to dig either load, saidv dumping being rapidly accomplished by a pull on the trip line 28 to release the dipper latch, whereupon the load itself will spread the movable walls of the dipper to permit such dis now to be explained further. forwardly or backwardly, and operating means in ' To assemble the dipper for back-digging, after its use as a forward digger, the three pivotal con nections III, M, and ii are temporarily removed, vand the dipper then turned so that its teeth ex terconnecting said movable boom member and ' dipper to‘ actuate them in unison from said ma chine. 40 3. In an excavating machine, a pairqpf rela tively movable boom members,-a dipper, a link pivoted at one end to the end of one of said boom members and at the other end to said dipper, and removed, and the other pin, I4, is placed through means for detachably pivotally interconnecting 45 the now adjacent pair of apertures i 3. In this po- 5 the end of the other of said boom members to said dipper selectively at either of a pair of spaced sition ofuthe dipper, the line" maybe slightly re arranged so as to continue to be controlled from points beneath and substantially equidistant from the pivotal point of said link and dipper and to the machine as heretofore, as for example, by ex tending forwardly and thence down over the pin either side of said point, whereby said dipper may 50 I0 for connection to the cam control of the latch, be used for digging either forwardly or backward ly relatively of said machine. somewhat as shown in Fig. 2. ' 4. In an excavating machine, a boom pivoted The pull line P now leads to the open side of the dipper and is freeof the latch means. In this for up and down movement, a dipper connected , tend in the reverse direction, namely rearwardly, after which‘ the pivotal connections II and ii are replaced into their positions from which they were ‘ vback-digging position of the dipper, the latch trip j to said boom and having an end wall and a rear 55 or release is through the line 28 as previously mentioned, but the resetting of the latch may be automatically accomplished, as by thethreading of a line T about a loose pulley 29 mounted on the forward end of the stationary boom element, one wall movably interconnected to open and close in unison, a latch maintaining said end and rear walls closed, a latch stop carried by a ?xed part of said dipper, and a cam operable from said machine to move said stop from its normal look on‘ the forward end of the movable boom element, ing position with said latch to permit releasing movement of said latch. and the other end being dead-ended to the upper portion of 'the rear wall of the dipper. Hence, after the dipper has been dumped, and the dipper 5. In an excavating machine dipper, an end wall and a rear wall movable in unison to open or close, and link plates interconnecting said walls and movable boom element are actuated back ‘to and moving in a plane substantially parallel to said side walls to wipe excess material from said side walls of the dipper upon movement of said ' - end of said line being dead-ended adjacent to and Wtheir initial digging position (and which in this ' , instance is of course farthermost from the ma chine), the line T willbecome taut, its length be ing such that it will just accommodate theopen ing of said dipper, and bring said movable walls to their closed position for the next dig. , Even in this position of the dipper for back ward digging, there is an unusually large digging 75 radius, on account ofthe fact that the dipper may so movable walls. > 6. In an excavating dipper, ?xed side walls, an 70 endwall and a rear wall pivoted to said side walls to move in unison to open or closed position, link plates pivotally interconnecting said rear and end walls and moving in a plane substantially 'ad- ' jacent and parallel to said side walls to scrape 75 4- I . 2,107,896 ' excess material from said side walls of the dipper upon movement of said end and rear walls rela tively of said side walls. - 7. In excavating machines, a dipper having tom of the inside of said dipper to adjacent the inside of the top of the same, and link plates at either side of said ‘dipper beween said ?anges and side wall and interconnecting said end wall and ?xed side walls and a movable end wall and rear rear wall so that said links wipe said side walls wall, inturned?anges on said rear wall in a plane and said ?anges wipe said link plates during open substantially parallel to said side walls, and link ' ing and closing movements of said dipper. plates at either side of said dipper, interconnect ing said'end and rear walls and movable in a . 9. In an excavating machine, a boom, a dipper, faces during opening and closing movement of and means for pivotally connecting said boom to either of a pair of spaced pivotal points selec tively on said dipper, whereby the latter may be removably reversed to dig either forwardly or the dipper. backwardly relatively of said boom. '10 plane between said ?anges and side wall so that said link plates and ?anges wipe adjacent sur ‘ 8. In an excavating machine dipper, ?xed side 15 walls, an end vwall and a rear wall movable rela tively thereto to open or close said dipper, and means for interconnecting said movable walls so that said movement cleans them of excess mate rial and comprising ?anges carried by said rear 20 wall in a plane adjacent and parallel to the side walls and extending from substantially the bot 10; In an excavating machine, a boom, a bucket having a plurality of pivotal points spaced trans 15 versely intermediate its front and rear, and means for pivotally removably connecting said boom to said bucket at one of said points for forward digging and to the other of said points for reverse digging- , HANS LUNDSTROM.