Nov. 19, 1946. 2,411,263 P. R. GUERIN ETAL INDUSTRIAL I TRUCK Filed Aug. 13, 1945 3 Sheets-_-Shee‘p l Pom/1 1 47 H6 1 Z I_INVFJVTOR$ Nov. 19, 1946. P. R. GUERIN EI'AL 2,411,263 INDUSTRIAL ‘TRUCK F‘lled Aug 15 1945 ‘F1622 3 Sheets-Sheet 2 ' INVENTORS _ BY M (W I “ Nov. 19, 1946. 2,41 1,263 P. R GUERIN ET AL INDUSTRIAL TRUCK Filed‘ Aug. 15.. 1945 s Sheéts-Shéet s 25 - fr.. A ________7.\_.___ / T 43 42 F16. 5 M1? 5‘ INIfENTORS‘, - BM’ "M ' Patented Nov. 19, 1946 2,411,263 _ ) UNITED STATES PATENT OFFICE 2,411,263 INDUSTRIAL TRUCK > Paul R. Guerin and Herman Musgrave, East Cleveland, Ohio, assignors to Towmotor Cor poration, Cleveland, Ohio, a ‘ corporation of Ohio vApplication August 13', 1945, Serial No. 610,408 14 Claims. (Cl. 21'_l-—,113) . - ,1 This invention relates to industrial trucks, and more particularly to means carried by said trucks for receiving and raising a load upon a carriage assembly and for changing the position of the erally the forward end of the body of an indus trial truck, I I one of the front wheels of the same, 1 ' and I2 one of a pair of side members of the frame behind which are located the corresponding arms (not shown) which enables the mast to be ‘tilted from a vertical position. Each of the side mem load~carrying member of said assembly thereby ' - to facilitate depositing the load in any desired position and location. It is the general object of our invention to provide simple and effective bers of the mast has secured to the lower portion thereof a hook‘ l3 by which the mast is pivotally a power operated mechanism for accomplishing the supported from a, cross bar “I which in turn may aforesaid movements of the carriage assembly and 10 be-supported by part of the front driving axle its load-carrying member. A further object of (not shown) in the manner illustrated and de the invention is to enable all of these operations to be readily and e'?ectively controllable by the operator. scribed in the patent to E. W. Weaver, No. 2,299,445, issued October 20, 1942. . I5 denotes generally the front plate of the sup A still further and more limited object of the 15 porting member of the carriage assembly from invention is to provide hydraulically operated means whereby the load-carriage assembly may be raised and lowered along the mast and rotary movement may be imparted to the load-carrying member of said assembly thereby to facilitate 20 depositing the load carried thereby in any desired ' position or location. - opposite sides of which guide plates l6 project rearwardly and engage the inner surfaces of the channeled side members of the mast-see Fig. 4. These guide plates carry upper and lower rollers which are adapted to engage the front and rear ?anges respectively of the channeled side mem-‘ bers of the auxiliary mast, the upper pair of roll Further and more limited objects of the inven tion will be set forth in the speci?cation and will ers being shown at I‘! in Fig. 4 as engaging the front ?anges of the channeled side members l8 be realized in and through the construction and 25 of the auxiliary mast which are telescoped within, arrangement of parts shown in the drawings the channeled side members I9 of the main mast. hereof wherein Fig. 1 represents a side eleva 2| denotes the main hoisting cylinder which is tional view of the front portion of an industrial located between the sides of the mast and within truck and the mast thereof and showing the which the plunger 22 is mounted, said plunger carriage assembly and the ‘hoisting and tilting mechanism for the carriage assembly constructed 30 carrying a cross head 23 at its upper end. The ‘cross head is provided with a pair of ears 24 ex in accordance with our invention, a'position of ‘ - tending upwardly therefrom and adapted to en the carriage when elevated being indicated by gage the cross tie 25 which connects the tops of broken lines and the front portion of the truck the side members l8 of the auxiliary mast. A being represented diagrammatically; Fig. 2 a, 35 yoke 26 is shown as connected to the webs of the front elevational view of the mast, carriage channeled members of the main mast and as as-sembly and hoisting and tilting mechanism extending across the rear of the same. shown in Fig. 1 and showing the rotatable load The construction thus far described is substan receiving member of saidv assembly in a load tially identical with that which has been employed receiving position; Fig. 3 a view similar to Fig. 2 40 by Towmotor Corporation in its production of and showing the rotatable carriage member ele industrial trucks, and hence needs no further .vated and also tilted to a position whereby a load description. . thereon may be conveniently discharged at a de The rotatable. carriage member comprises gen sired angle; Fig. 4 a detail in section correspond erally a framework consisting of an upper spacer ing to the line 4-4 of Fig. 1 and looking in the 45 bar 21, vertical side bars 28, centrally located ' direction of the arrows; Fig. 5 a diagrammatic vertical reinforcing ‘bars 29, with an upper cross view of the means for controlling and supplying liquid to the auxiliary cylinders which constitute part of the means for realizing my invention; and plate 30 and a lower cross plate 3| connected to the vertical bars 28 and 29. ' 32 denotes a fork-supporting bar which is Fig. 6 a, detail showing the manner of connecting 50 mounted in aligned apertures provided therefor sections of a chain& the links of one of which in the vertical side and reinforcing bars adjacent . sections are arranged at right angles to the'links to the spacer bar 21. 33 denotes the vertical of the other section. arms of lifting forks, the lower forwardly project Describing by reference characters the various ing ends of which are shown at 34. The upper parts~ illustrated in- the drawings, l0 denotes gen 56 ends of the fork arms 33 are provided with aper ' 2,411,203 4 _ ‘able carriage assembly. bar 32, and may be retained in any desired ad justedposition with respect to said bar by means of U-shaped yokes 35, the legs of which are u adapted to be inserted through openings 21m in the top of the spacer bar 21, with their legs em-. . arms. ' v » ‘ ,With the parts constructed and arranged as thus described, the operation will be as follows: When the carriage assembly is in its lowermost position, as shown in Fig. 1, the pistons in the , jacks will be adjacent to the tops of their respec bracing opposite sides of the upper ends of the fork . tary tilting movement is imparted to the rotat tures whereby they are slidablymounted on the tive cylinders 4| with the rotatable carriage mem I ber in the position shown in full lines in Figs. 1 1 The manner in which the rotatable carriage member is supported for rotation on the support 10’ and 2. The cylinders are provided each with a pipe 53 connecting the upper end thereof with a ing member will now be described: 31 denotes a double valve assembly 54, the bottoms of the cyl shaft which is journaled in a bushing 38 secured inders being connected by an equalizing pipe to the front plate l5 of the supporting member , 55; The carriage assembly will be lifted before of the carriage assembly and vwhich extends through the said plate and through the cross 15 tilting the rotatable carriage member, even to points where it is necessary to resort to the use of plate 30. and is keyed to the latter, the end which the auxiliary mast, which will be elevated as the projects through the said plate being reduced and plunger 22 is raised, by engagement of the ears threaded and provided with a nut 39. 40 denotes 24 with the cross tie 25. When the carriage as ‘a circular rotary operating member for the tilting of the rotatable carriage member, the said oper 20 sembly shall have been elevated to' the point where it is desired to discharge the load, the ating member being itself operated !by a; ?exible rotatable member may be rotated by the aux member which engages the peripheral portion. iliary cylinders and pistons by relieving the pres thereof. The circular member as shown herein sure on top of one of the pistons and by applying engages its periphery is shown as a chain. 25 pressure to the top of the other. Ordinarily the carriage assembly will be low . In order to impart rotary movement to the is a. sprocket since the ?exible member which ered by gravity, due to the weight‘ of the same, rotatable carriage member through the instru even when devoid of a load. ‘ ' ' mentality of the said sprocket, we have provided It will be noted, from theforegoing, that the 7 the 'following‘construction: 4| denotes cylinders of jacks which are conveniently. located within 30 cable by which the rotatable carriage member may be tilted can serve the double function of the lower portion of the mast assembly, the enabling this tilting action to be obtained as well lower ends of which cylinders are provided each >with a. lug 42 whereby it is pivotally supported at . as enabling vthe carriage assembly to be elevated its lower end by means of a pivot pin 43 extend‘ to any desired extent within the limits of the stroke of the plunger 2-2. Heretofore, the‘tilty ' ing through an aperture in said. lug and through ‘ ing of rotatable carriage members of carriage apertures in brackets 44 which are anchored to the base of the mast assembly. Each of the assemblies has been obtained by mounting the, said cylinders is provided with a piston rod 45 ' extending through the top of its cylinder. Each~ ' piston rod is provided at its upper end with a 40 clevis 46 the open end of which receives therein the block of the lowermost link of a section or member 41 of a cable (shown as a chain) which motive power on said carriage assembly and sup? plying operating. ?uid (hydraulic or electric)’ thereto by hoses or cables draped inconveniently upon the mast. > It will be noted ‘further that the means whereby 1' we are enabled to accomplish the useful functions set forth hereinbefore can be incorporatedin a is connected to the clevis by means of'a pin 48. From the said clevises, the ascending reaches‘ of 45 well known type of industrial trucks, with a mini- . mum of alterations with respect to the arrangethe chain sections'or‘members extend around ment of the parts which have been used as stand- I rollers 49 mounted for rotation on opposite ends ard equipment for such trucks. of ‘the cross headv 23. The lower ends of the de Having thus described our invention, what we scending reaches 41a of the said chain sections . ‘ . or members are connected with a third bottom 50 claim is: 1. In an industrial truck, in combination with section or member 4‘Ib which forms a bight or the front portion of the frame thereof and a loop therewith and which is connected thereto as follows :' 50 denotes connector blocks, each having substantially vertical mast assembly supported by the said portion of the frame, a carriage as tending at right‘ angles to each other and with 55 sembly comprising a supporting member slidably mounted upon said mast assembly and a rotat- -‘ the lower ends of the side members 41° of the bot able member provided with load supporting tom links of the descending reaches of the ?rst ' their opposite ends bored, with the bores ex chain sections or members connected to the up means and mounted for rotary movement upon and with respect to the said supporting means, per ends of their respective connector blocks by and common means for lifting the said carriage means of pins 5|, ,while the side members 4'!‘1 60 ' assembly and for imparting rotary movement to of the links at the upper ends of the bottom sec-v the rotatable member thereof. tion or member 4'|b are connected in like manner » 2. In an industrial truck, in combination with to the bottoms of the connector blocks by pins the front portion of the frame thereof and a 52 extending through the bores in the bottoms 65 substantially vertical mast assembly supported by of the blocks and through the upper ends of the said portion of the frame, a carriage assembly said side members. Due to this construction, the comprising a» supporting member slidably mount- v links of the chain sectionior member 4‘!b are arranged at right angles with respect to the links » of the reaches 4'!B of the chain sections or mem bers thereabove, which enables the lowermost section ‘or member to obtain a driving connec tion with the teeth of the sprocket 40. It will be seen that the three ?exible sections or members ed upon said mast assembly and a rotatable mem ber provided with load supporting means and 70 mounted for rotary movement upon and with re- spect to the said supporting member, means for imparting ‘ rotary movement to the rotatable member, and means co'operating with the last mentioned means for imparting lifting movement 41, 4'18 and 41b constitute a cable by which roe 75 to the carriage assembly. ' 2,411,268 _ its cooperating rotatable circular supporting 3. In an industrial truck, in combination with the front portion ofv the frame thereof and a - member, the said cable having a looped portion substantially vertical mast assembly supported‘ ' extending from the rotatable circular supporting by said portion of the frame, a carriage assembly members to and around a peripheral portion of‘ . comprising a supporting member mounted for the circular operating memberfor the rotatable Sliding movement upon the mast assembly and V a rotatable member mounted for rotary move : ment upon and with respect to the said support carriage member. ' ' 9. In the industrial truck set forth in claim 8, i ‘ means for raising and lowering the carriage as ing member, means including a cable for lifting ' sembly independently of said cylinders. and pis the said carriage assembly and for imparting 10 ton rods. rotary movement to the rotatable carriage mem 10. In the industrial truck set forth in claim 8, ber. ‘ ' the rotatable circular supporting members being 4. In an industrial truck, in combination with located above the cylinders and pistons and be the front portion of the frame thereof and a‘ ing carried on opposite ends of a cross head, a substantially vertical mast assembly supported 15 plunger on the upper- end of which the cross thereby, a carriage assembly comprising a sup head is supported, and a cylinder within which - porting member mounted for sliding. movement upon the mast assembly'and a rotatable member mounted for rotary movement upon and with re spect to the said supporting member, and means for imparting rotary movement to the said rotat able member, the said means comprising a pair of cylinders each having a piston therein with a piston rod extending through an end thereof, rotatable circular supporting members inter 25 posed between the projecting ends of the piston rods and the rotatable carriage member, and flexible operating members each connected at one end to the operating end of a piston rod and said plunger is mounted. ‘ 11. In an industrial truck, in combination with the front portion of the frame thereof and a. substantially vertical mast assembly supported by said portion of the frame, a carriage assembly comprising a supporting member slidably mount ed upon said mast assembly and a rotatable mem ber provided with load supporting means and mounted for rotary movement upon and with re spect to said supporting member, a pair of cylin ders, pistons within said cylinders having piston. rods projecting through ends thereof, rotatable circular supporting members interposed between each extending around a peripheral portion of 30 the operating ends of said piston rods and the rotatable carriage member, a shaft secured ‘to having the end portion opposite that which is said rotatable carriage member and supported connected to a piston rod operatively connected for rotary movement by the supporting member to the rotatable carriage member. , of the carriage assembly, a sprocket on the said 5. In the industrial truck set forth in claim 4, 35 shaft, a chain having its opposite ends connected means for raising and lowering the carriage as to the operating ends of the said piston rods ' a rotatable circular supporting member and each sembly independently of said cylinders and piston with reachespassing around peripheral portions rods. of the corresponding rotatable circular support ' l '6. In the industrial truck set forth in claim 4_ a ing members and with other reaches extending a main hoisting cylinder and a plunger therein, 40 from said rotatable circular supporting members the said plunger supporting the rotatable circular and formed into a bight or loop which extends supporting members. i around a peripheral portion of the said sprocket, ,7. In the industrial truck set forth in claim 4, and means for imparting movement to the pis the mast assembly comprising a main mast and tons within their respective cylinders. an extensible mast mounted for sliding movement 45 12. In the industrial truck recited in claim 11, upon the main mast, a main cylinder, a plunger a main hoisting cylinder and a plunger therein, therein, and a cross head on said plunger on the said plunger supportingthe rotatable circular which the rotatable circular supporting members supporting members. ‘ are mounted, the cross head being adapted-by 13. In an industrial truck, in combination with the elevation of the plunger to‘ elevate the ex 50 the front portion of the frame thereof and a tensible mast. , substantially vertical mast assembly supported 8. In an industrial truck, in combination with I by the aforesaid-portion ‘of the frame, a carriage the front portion of the frame thereof and' a assembly comprising a supporting member slid substantially vertical mast assembly supported a ably mounted upon said mast assembly and a by said portion of theframe, a carriage assembly rotatable member provided with load supporting comprising a supporting member slidably mount means, a shaft supported for rotary movement by ed upon said mast assembly and a rotatable the said supporting member and rigidly con member provided with load supporting means nected to the rotatable member, a sprocket upon and mounted for rotary movement upon and said shaft, a pair of cylinders, pistons within said with respect to the said supporting-member, 'a 60 cylinders having piston rods projecting through pair of cylinders, pistons within said cylinders ends thereof, .a rotatable circular supporting ‘having piston rods projecting through ends of member interposed between the operating end the latter, and a rotatable circular supporting of each of said piston rods and the rotatable member interposed between the operating end of carriage member, chain members connected each each piston rod and the rotatable carriage mem at one end thereof to the operating end of the ber, and means for rotating the rotatable-car cooperating piston rod, the said chain members ._ riage member comprising a shaft rigidly con comprising reaches extending around peripheral nected with the rotatable carriage member and portions of the respective rotatable circular sup mountedv for rotation upon and slipported by the porting members and additional reaches extend supporting member of said carriage assembly, a 70 ing from said circular supporting members, and rotatable circular operating member rigid with a third chain member having its links arranged the said shaft, and a cable having its opposite at right angles to the links on the other two chain ends connected with the operating ends of said ' members and extending around a peripheral por piston rods and having a reach extending from tion of the sprocket, and~means for connecting each of said rods around a peripheral portion of 75 the upper ends of the third chain member to , 2,411,288 the ends of the additional reaches of the said other chain members. 14. In the industrial truck ‘recited in claim 13, the means for connecting the ends of thethird chain member to the ends ofn-lthe additional 6 reaches 01' the othe'n chain members comprising connector blocks each providedatbnerend thereé 01' with means for connecting thereto the end of one of the said additional reaches and at its. other end with means, at right angles to the ?rst mentioned means, for connecting thereto an end .of the third chain member. PAUL R. GUERIN. HERMAN MUSGRAVE. '