w. 15, 1946.. ' c. w. MOTT 2,409,510 ‘POWER ADJUSTING MECHANISM’ Original Filed Nov. 21', 1942 P...\hmm7. §ill aw. ‘m“, \ ~\. JI\ v 7 Sheets-Sheet 1 0:515, 1946. c. w. MOTTi 2,409,510 POWER ADJ USTING MECHANISM Original Filed Nov. 21, .1942 I 7 Shgets-Sheet 2 'Oct; 15, 1946. 2,409,510 _ c. w. MOTT POWER ADJUSTING MECHANISM Original Filed Nov. 21, 1942 7 Sheets-Sheet 3 k9’ PW0wM. 15, 19416. c. w. MOTT 9,510 POWER ADJUSTING MECHANISM original‘Filed Nov. 21, 1942 7 Sheets-Sheet‘ 4 Oct. 15, 1946. c. w. MOTT ‘ 2,409,510 POWER ADJUSTING MECHANISM Original Filed Nov. 21, 1942 7 Sheets-Sheet 5 @ pm.6W. WMWm. Oct. 15, 1946. c. w. Mo'r'r 2,409,510 POWER ADJUSTING MECHANISM ,Original Filed Nov. 21, 1942 ’ 7 Sheets-Sheét e Oct. 15, 1946. c. w. MOTT 2,409,510 POWER ADJUSTING MECHANISM Original Filed Nov. 21, 1942 ‘ , 7 Sheets-Sheet 7 \\ vyzwww ' (£3?arz (5W0 0% 2,4tih5l0 Patented Oct. 15, 1946 UNITED STATES PATENT OFFICE 2,409,510 POWER ADJUSTING MECHANISM ‘ Carl W. Mott, La Grange, Ill., assignor to Inter- . national Harvester Company, a corporation of New Jersey Original application November‘Zl, 1942, Serial No. 466,463. Divided and this application March 22, 1944, Serial No. 527,625 5 Claims. (01. 97-50) , 1 This invention relates to vehicle-mounted im plements and, more particularly, to power-lifting and power-adjusting mechanism supplied with operating energy from a power plant associated with the vehicle. The present application is a division of my copending application, Serial No. 466,463, ?led November 21, 1942, for “Power ad justing mechanism.” vThe general purpose of this invention is the 2 the length of time the valve control member is displaced from the neutral position. Conse quently, an operator of a vehicle having appa ratus of this kind installed thereon must divert his attention from the course of the vehicle or other duties to observe the tools for ascertaining their effect while manipulating thevalve control lever for causing a change in their depth. The operator cannot judge the time the valve is left provision of a mechanical organization for the 10 open with sufficient accuracy for assuring that the tools will be set or reset to a desired depth. _, practise of a new tillage technique. Vehicular tillage apparatus constructed according to the principles of this invention functions in a man ner enabling an operator to manually control power derived from the vehicle power plant for In the present apparatus where there is co-‘__ ordination both in direction and amount of movement'of the tools with respect tomanual control member manipulation, this member can be reset at any time for positive precise resetting of the tools. This type of‘operation has been age tool both upwardly and downwardly coor found particularly useful where the apparatus is dinately with selective movement of a manual operated in ?elds having areas of relatively hard control member in respectively opposite direc tions. Such coordination between the direction 20 and soft soil. When, for example, the oper and amount of movement of the manually'con ator arrivesat the area of hardsoil which he desires to till at a greater depth, he can, from trolled'member and the direction and amount of depth adjustment of a tillage tool in a positive the experience of one or more previous excur manner enables the operator to easily and uni sions across that hard area, know the exact set formly control the tool depth in all kinds of ting’ he willwant for the manual control member for obtaining the desired greater‘tool depth. He soil. The apparatus is convenient for the oper can therefore simply move the manual control ator, since irrespective of the character of the lever to the desired positionwithout observing soil encountered, he can select the depth at which the tools. He may, of course, when subsequent the tillage tool will be operated by the virtual ly convenient, observe the tools to see thatthe effortless ‘movement of a ?nger-pressed lever into desired vtillage eiiect is beingobtained, Since a position corresponding to the desired depth. positively controlling the working depth of a till f Due cognizance istaken ‘of certain priorart the apparatus functions to vforce the tools into structures which employ manually controlled ap paratus, which, by means of power derived from the vehicle engine, respond for mechanically con trolling the depth. One example of this type of prior art is disclosed in the British Patent No. 19,419 (A. D. 1890). In the disclosure of this pat ent, water under‘ pressure is selectively intro the ground as well asto raise the-tools by means duced into opposite ends of the cylinder of a reciprocable hydraulic motor piston for causing this motor to either lift or lower a ‘tillage tool. However, the water is controlled in its flow to and from the motor cylinder by an ordinary slide valve which necessitates the manipulation of a valve control member from a neutral position for causing the water to drive the motor and the subsequent manual restorative manipulation of the control member to the neutral position for stopping the motor. The control lever and the motor work member or piston arenot correlated both in direction and amount of movement, wherefore atime, element is involved, namely, that the tillage tool will be, raised or lowered, as the case may be, a distance depending upon of > power derived from the vehicle engine, the just described technique can be practisedgin all types of soil. ‘ Cognizance has also been taken of the prior art Patents Nos. 2,118,180 and 2,118,181 to-I-Iarry G. Ferguson, which disclose related apparatus in which a manual control member functions to cause movement of the tillage tools only in an upward direction, but, since the responsive move ment of the tools also depends upon the magni tude .of the. drawrbar pull, the depth adjustment of the tools while in the soil is not necessarily uniformly correlated with the movement of the control member. Also the Ferguson apparatus depends upon the weight and “suction” vofthe tools for causing them todig more deeply into the ground and for this further reason cannot be utilized for accomplishing the aforesaid purpose of the present apparatus. This applicant is also aware of manually con‘-, trolled power apparatus employed in other arts to obtain powered movement of a driven mem 2,409,510 3 ber in either of opposite directions in an amount correlated in both direction and amount with the movement of an oppositely movable control member. Notable of such arts is hydraulic steering, and for an example, reference may be made to United States Patent No. 529,495 to Byron Jackson. A further object of this invention is the pro vision, in a hydraulic system for controlling the elevation of a tillage tool, of valve means hav 10 ing variable delivery successively operable ?ow 4 tending from an operator’s station 24 on the rear ward portion of the tractor is a steering mecha nism 25 for controlling the path of movement of the tractor. To the forward portion of the trac tor is connected for vertical movement a working tool structure 26 having working tools 21 there on. The connection of the working tool struc ture with the tractor is made by means of upper and lower parallel links 28 and 29 connected to a bracket structure 30 secured to the forward por tion of the tractor by means of clamping bolts 38. On the bracket structure 30 is a lifting lever rate stages for controlling the energization and speed of the ?uid-driven motor which changes 32 pivoted for fore and aft movement and con the elevation of the tool, and wherein the flow nected to the working tool structure 26 by means rate in each stage ‘is variable, making it possible 15 of a lift rod 33. to employ the stage of less ?ow capacity for ob On the rear portion of the tractor is connected taining small adjustments of the tool while a bracket structure 34 to which is connected, by it is in the soil-tilling position. means of parallel links 35, a rear working struc These and other desirable objects inherent ture 36 having a working tool 3'! thereon. Simi in and encompassed by the invention will be larly, there is on the bracket structure 34 on the more clearly understood upon reading the en suing description with reference to the annexed drawings, wherein: Figure 1 is a view in elevation of a tractor or tool-supporting structure with a working tool connected thereto and with the ?uid-operated arrangement of the present invention arranged for moving the working tool; rear of the tractor a fore and aft pivoted lever 38 connected to the lower parallel link 35 by means of an adjustable lift rod 39 having a handle portion 40 accessible to the operator’s station 24. By means of this handle portion 40, an adjustment may be made of the rear working tool structure independently of the forward working tool struc ture. Figure 2 is a view in elevation of the interme~ The tractor 2i has the usual power plant 4| and diate housing of the tractor with a portion there 30 a, longitudinally extending body portion 42. This _ of cut away to show a fluid operated device and ‘body structure 42 includes an intermediate hous other parts of the ?uid operated arrangement ing 43 in which are mounted parts of the ?uid which are used therein; power arrangement to be described more in detail Figure 3 is an enlarged plan view of the ?uid hereinafter. Extending from the housing 43 and operated device together with its valve mecha pivoted thereon for fore and aft pivotal movement nism; is a lifting arm 44 connected respectively with Figure 4 is an enlarged view in elevation of the the Divotable levers 32 and 38 by means of hori ?uid operated device taken of the same side ex-' zontal lift rods 45 and 45, Adapted to be oper posed in Figure 2 but with a portion of its cylin ated by the tractor motor is a ?uid pump 4'! hav~ der structure broken away to show the piston 40 ing communications with the intermediate hous within the same; ing'43 by means of e, communicating pipe 48. Figure 5 is a side elevational view'of the ?uid Within a fuel supply tank 49 there is a ?uid res operated device looking in the direction opposite ervoir housing 50 arranged for communication to that shown in Figure 2 and with a portion of with parts within the intermediate housing 43 the valve mechanism broken away for clarity, the “ by vertically extending pipes 5i and 52. On a view being taken generally along the line 5-5 of steering rod supporting post 53 is mounted a con Figure 3; trol lever 54 manually adjustable along a quad Figure 6 is an unfolded view of the valve mech rant 55 for operating a lever 56 pivoted on the anism illustrating the ?ow of ?uid therethrough intermediate housing 43 and connected inside the pursuant to causing piston movement in one di housing with the parts of the ?uid power arrange rection; ment in a manner brought out hereinafter. The Figure 7 is a view similar to that of Figure 6 with the valve mechanism conditioned for direct connection of the lever 54 with the lever 56 is made by a rod 57 connected to the lower end of the lever 54. The lever 54 is pivoted at 58 on the ing the flow of ?uid (indicated by the arrows) so as to cause the piston to move in the opposite direction; Figure 8 is an unfolded view of the distributing head in the tractor intermediate housing, with lines illustrating the ?ow of ?uid through the same; Figure 9 is a sectional view taken along the line 9-9 of Figure 8; Figure 10 is a sectional view taken along the line Hi—-l0 of Figure 8; I Figure 11 is a fragmentary view in section of the distributing head of Figure 8, showing the by pass valve thereof. With continued reference to the drawings, there is shown in Figure 1 a tractor or tool supporting structure 2| of a character suitable for embodi ment in the invention. This tractor includes a dirigible supporting truck at its forward end with wheels 22 and also includes traction wheels 23 which provide support at the rear. Connected with the dirigible wheels .22. and ‘3X. quadrant 55. Referring now particularly to Figure 2, there is shown an enlarged View of the intermediate housing 43 with a portion of the same broken away to show parts of the ?uid power arrange ment therein. This housing 43 is of sturdy con struction since it is a part of the body portion which must withstand the usual strains common to tractors of this type. The lever 44 is pivoted to the upper portion of the housing 43 as indi cated at 59 and has a lower end 60 to which is coupled a piston rod 61 of a fluid power or ?uid operated arrangement or device 62 mounted with in the housing and pivoted to the same as indi cated at 63 in an inclined position. The lever 55 is likewise pivoted to the upper portion of the housing 42 as indicated at 64 and has a depend ing portion 65 which is connected to a longitudi nally movable follower element 65 located on the ?uid operated device 62, the function of which 75 will be described hereinafter in connection with 2,409,510 6 5 the description of the ?uid operated device it self. ‘ For the sake of compactness, the ?uid com munication pipes 48 are connected to the housing 43 as indicated at 61 and are in communication with corresponding pipe openings 68 and 69 formed through the housing 43. For further communication of the ?uid from the passages 68 being retained ‘by the ring 83, while the latter is retained by a washer 89 and a ring 90 secured to the main piston element 85. As viewed in Figure 4, the clamping bolt 11 is threaded into a thread ed recess 9! directly upwardly into the cylinder structure from the lower edge of the same. Ad— jacent the threaded recess 9|, Figure 6, is a ?uid communicating opening 92 into which ?uid passes from the hose l4, and thence through a passage 93 nected to the top part of the body housing 43. 10 to an angle-shaped passage 94 in a valve housing '95 which is adapted to be secured to the cylinder v Fluid from the reservoir 56 is delivered through structure 18 with a partition plate 96 secured the pipe 52 and a coupling ‘II to a passage within therebetween. This partition plate 96 has several the block it] for delivery to the passage 68 and ?uid passing holes arranged for communication thence to the pump 41, Fluid is returned from the pump to the passage 69 under pressure and 15 between respective other passages, as the passage thence through the block 10 and a supply hose ' 94, formed in respective ?at faces of the valve housing structure 95 and of the cylinder structure 12 which communicates with a distributing valve 18. By using the partition plate 96 the difficult 13. From this distributing valve 13 ?uid is deliv task of coring holes within castings is eliminated. ered under pressure through a hose 14 to the ?uid operated device 62. From the ?uid operated de 20 The passages may be simply impressed or cast into ?at or complementally ?tting faces of the vice 62 the ?uid ?ows through a hose 15 and and 69, there is a communication block 10 con structures adapted to be seal-pressed together, the distributing valve ‘i3 and thence through the and the fluid passages themselves are completed vertical pipe 5! for return to the ?uid reservoir on opposite sides of the partition plate 96 by vir 50 in the fuel tank 49. As the ?uid is distributed under pressure to the 25 tue of the same being secured therebetween. Hence, in the manufacture of the power device ?uid operated device 62, the arms 44 on the inter the necessity for coring of openings in order to mediate housing 43 will be adjusted thereby fore provide passages for the ?uid has been eliminated. and aft, and since the working tool structures on All of this has lessened the cost of a more or less the forward and rearward portions of the tractor are connected to these arms, these working tool 30 complicated structure and has brought the same within the price range of ?uid-operated devices structures will be adjusted by the power of this“ ?uid actuated device 62. The amount of move of the more simple type. - Referring now particularly to Figure 6, the ?uid on entering the passages 92 and 93 is first working tools are moved from one extreme posi 35 communicated to a longitudinally extending cavity or impression 97 in the exposed ?at face tion to another extreme position with respect to of the cylinder structure 16. From this impres the tractor. This movement of the working tool sion 97 it may be delivered either through a hole structure is initiated by the manual lever 54 0p 98 or a hole 99 in the plate 96. Assuming the erated from the operator’s station .24 although it should be understood that the actual move 40 ?uid passes in the direction of the arrows through the hole 98, it comes into communication with ment of the working tools is done by the power the angled impression 94 in the valve housing 95. device itself. In a manner to be hereinafterv de ment of the working tools is limited only by the maximum stroke of the piston rod 6| whereby the This valve housing 95 has four valves I00, l9l, ‘H32, and I93 within chambers I94, I05, I96, and the quadrant 55, and this movement will be re ?ected in the valve control mechanism associated 45 H31, respectively, of the valve structure 95. Fluid upon leaving the impression 9'! passes through the with the ?uid power device 62 so that a corre opening 98 in the plate 96 to the valve chamber sponding movement of said power device and m5 andpast the valve “H, which is open, to the working tools will be had. impression 94 on the face of the valve structure Referring now particularly to Figures 3, 4, and 5, a description will now be made of the ?uid ac 50 95. From this impression 94 it is delivered through an opening H19 in the plate 96 to a pas— tuated device 62 and of the valve mechanism \ sage I H] in the left-hand or front end of the therefor, and by assuming that ?uid is already cylinder structure from which it is discharged provided under pressure in the communicating into the cylinder structure to act upon the pis hose coupling 14 for delivery to the ?uid operated device 62. The communicating hose coupling 14 65 ton 19. For work to be performed upon the piston 19 connects with the ?uid operated device by means there must be a release of ?uid on the end of the of a coupling 16 secured to the device by means piston opposite to that against which ?uid is im of a clamping bolt ‘ll. The ?uid operated device 4 pressed for producing a work stroke. This is ac includes generally a cylinder housing 18 and a piston structure 19 secured to the inner end of 60 complished by ?uid passing from the opposite end of the cylinder structure, corresponding to said the piston rod 6|. The piston rod is slidable opposite end of the piston, through a passage through a cylinder head 80 which closes one end lll thereof, thence through an opening H2 in of the cylinder structure ‘I8. The opposite end of the plate 96 and for delivery to an angled im the cylinder structure [8 has a head member 8| with a lug 82 serving to connect the device with 65 pression H3 on the face of the valve structure 95. From this impression N3, the ?uid passes the intermediate housing 43, as previously men the valve I92 for delivery to an intermediate ‘T tioned, at 63. shaped impression H4 in the valve structure 95. The piston structure 19 may be of any known From this T-shaped impression H4 ?uid passes type adapted for double acting cylinder devices, but in the present instance includes a ring 83 70 through an opening‘ H5 in the plate>96 to an impression H6 on the face of the cylinder struc which fits over a narrowed portion 84 of the pis ture, downwardly through a vertical passage H‘! ton rod and is made fast thereto by a main piston to an outlet port H8. This outlet port H8 is in element 35 threaded as indicated at 86 to the por communication with a hose coupling J19 secured tion 84. Associated with this main piston ele to the cylinder structure by means of a clamping ment 85 are wiping rings 81 and 88, the former scribed, the lever 54 can be set at any position on 2,409,510 .‘bolt ‘I20 seated in‘an opening I2I , Figures 4 and 5. From the opening H8 ?uid then passes through the coupling H9 to the hose connection ‘I5 to be delivered to the distributing valve 13 for re turn .to the fluid reservoir 50. As viewed in Fig ure 6, it will be noted that upon the introduction main valve I00 may be opened with the least expenditure of energy, thereby making possible the use of operating devices of minimum dimen sion for operating the valve. A hole I34 in the valve provides communication between the cham ber I2‘! and a chamber I33 bounded in part by of ?uid to the cylinder through the opening I I0 and the exhaust of ?uid from the cylinder the valve seat I29. vthrough the opening II I, the piston ‘I9 will be valve I00 through which ?uid is transmittable The chamber I33 has a narrow opening I35 in the upper part of the moved to the right or rearwardly, or, as viewed 10 to the upper part of the ?uid-containing valve ' ‘in Figures 4 and 1, will be moved to the left or rearwardly to rock the arm “for raising the working tools. Should the piston 79 be projected forwardly 'orto the left, as viewed in Figure 6, when a lower ing of the working tools is desired, the ?uid will take a path through the valve structure as now to be described with reference to Figure 7. To .e?ect movement of the piston to the left, referring .to Figure 7, the ?uid which always enters the bore I04. Through this opening I35 there ex tends a vertical operating rod I36 which contacts the ball I29 and which, when pressed down wardly, serves to unseat the ball I28 from its contact I29 on the valve I00. As the ball I28 is unseated, ?uid under pressure will at ?rst pass upwardly through the narrow opening I35 until su?icient back pressure is built up above the main valve I00 to materially contribute to the lowering of the same for breaking the contact of the tapered portion I25 with the valve seat I25. The downwardly displaced ball forces the plunger vertically extending opening 92 will be delivered through the long impression 91 to the opening 99 in the plate 95, instead of to the opening 98 of the plate 95, and then through the valve chamber I01, and past the valve I03 to the angled impression .I I3 for delivery through the opening I30 downwardly, ?rst an initial amount to bring H2 in the plate 96 to the passage III in the cyl inder structure ‘I8. From this passage III it is discharged into the cylinder structure to act upon the piston for effecting movement of the same to the left. Simultaneously with movement of the piston in this direction ?uid leaves the cyl inder structure from the opposite end of the pis ton and does so through the opening IIO, open slide it downwardly, comparatively little addi tional force applied downwardly through the rod the upper side of an oversize opening I 3‘!a ex tending diametrically through the plunger into ‘contact with a pin I3‘!b traversing said opening and having its ends fastened in the valve mem ber, I00. Then, after the building up of said back pressure above the valve member tending to I36, ball I23, plunger I30, and the cross-pin I31b is necessary to cause the valve member I00 to move downwardly to unseat it at I25 and thus ing I09 in the plate 96, impression 94, piston 35 provide direct communication between the an valve I00, valve chamber I04, an opening I22 in nular chamber and the upper part of the valve the plate 96, and thence into an axially extending casing bore I04. impression I23 in the ‘cylinder structure 18 from As a means for operating the rods I36 there which it passes through an opening I24 in the are provided plungers I39 reciprocally carried in plate 95 to the T-shaped impression H4 in the a sealing block I40 through which the rod I36 valve structure 95. From the T-shaped impres extends. This sealing block I40 is located in the sion I I4 the ?uid discharge continues through the upper end of the valve casing bore I 04 and bears opening II5 to the impression H6 in the valve against a sealing element I4I. Pairs of the seal structure and thence downwardly through ver ing blocks I40 are retained in place by respective tical openings I I‘! and I I8 to the return hose con plates I42 secured to the upper part of the valve nection ‘I5. It should now be apparent that valve housing by means of screws I43. The plungers ‘mechanism has been provided for controlling the I39 are normally retained vertically upwardly by ?ow of ?uid for moving the piston 19 in either of the action of the spring I3I. The valves are its reciprocal directions within the cylinder ‘I8. arranged in pairs and from them there extend Referring now to Figure 5, a description of the 50 two of the control plungers I39 spaced axially valve arrangements I09 to I03 will be made with of the cylinder structure ‘I8 and accessible at the particular reference to the arrangement I00, since top of the valve structure 95. Each pair of these four valve arrangements are identical. The plungers is controlled by a lever I44 pivoted on a valve I06 is cylindrical and is tapered on one end, pin I 45 supported by a lug I46 mounted on the as indicated at I25, for contact with a conical seat 55 plate I42. Each lever is alined longitudinally :I2'6 formed in the valve housing 95. For a por with the tops of its respective plungers I99 and tion of its length, adjacently to its tapered por as the same is rocked about its pivot pin I45 tion I25, the valve is of smaller diameter than either one or the other of the two plungers I39 the valve casing bore I 04 in which it is reciprocal, will be depressed against the action of the asso to provide a, passage for ?uid around this portion 60 ciated compression spring I3I. of the valve upon the same being opened by the Mounted on the upper side of the cylinder breaking of its contact with the seat portion I26. structure 18 for pivotal movement about an axis When the valve is closed, this smaller diameter parallel with that of said structure is a main portion of the valve, together with the valve cas operating lever I41, Figures 1, 2, and 3, having a ing bore I94, provides an annular ?uid chamber laterally extending arm I48. The pivotal connec I2‘! about the valve I00, and this chamber is in tion is made to lugs I40 and I50 located respec communication with certain of the holes as 98 tively on the head members 80 and SI of the and I00 formed in the plate 90. cylinder structure, and by means of pins I5I and Within the valve I00 there is a secondary I52. This pivoted operating member I 41 there— ball valve I28 normally retained against its seat 70 fore spans a substantial distance lengthwise of I 29 by a spring-pressed plunger I30 to the lower the cylinder structure. end of which is connected a compression spring ’ The arm I48 ‘has in its outer end a horizon I3I which reacts against a plug I32. This sec tally extending slot I53 adapted to receive a ondary valve is so designed in the valve I00 in connecting element I54 having ball-shaped ends order to provide an arrangement whereby the 75 I55 for making universal joint connections re 2,409,510 10 spectively with the inner ends of the levers I44, - of the piston will begin and will not stop until the ball ends I55 being inserted within recesses I56 of the levers. As the lever I41 is rocked, the the cam I6I has been moved so that the pin I69 is again in the center of the neutral or in outer end of its arm I48 will move either upwardly clined portion I65 of the slot. If the cam fol or downwardly for pivoting the levers I44. If lower 66 is moved to the left as viewed in Fig the arm I49 moves downwardly, the plungers I39 ure 4, the piston will move to the left until the on the inner sides of the pins I45 will be de portion I65 of the slot has returned the cam fol pressed, whereas if the arm’ I48 is moved up lower and the pivoted structure I41 to the neutral wardly the plungers I39 at the outer sides of the position. Similarly, if the cam follower 66 is pins I45 will be depressed. In either movement 10 moved to the right, the piston 19 would move to of the arm I48 one plunger I39 of each pair will the right, assuming that it had not already been completely returned to the right side of the cyl be moved. One form of means will now be described which inder structure as viewed in Figure 4. employs cooperable and independently movable As the inner plungers I39 are depressed, the counterparts, respectively manually controlled 15 valves NH and I02 are opened as viewed in Fig and constrained for movement with the motor ure 6, and ?uid automatically ?ows as traced in piston, for manipulating the valves in the motor Figure 6 to the port I I6 to act against the piston casing in such a manner that the said piston or 19 to the right, or to the left as viewed in Fig work member will be driven coordinately in di ure 4. When the outer valves I 69 and I63 are rection and distance with the direction and dis 20 depressed, the flow of fluid is as illustrated in tance of adjustment of a manual control mem Figure '7, that is, to the piston rod end of the ber (54, Fig. 1) connected with the manually cylinder structure to move the piston 19 to the controlled counterpart. Another form is dis left, or to the right as viewed in Figure 4. closed in my copending application Serial No. The valve balls I28, in addition to serving as 516,470, ?led December 31, 1943, for Fluid con 25 an initial opening means for the valve means as trol apparatus. On the pivoting operating structure I41 is a longitudinally extending rod I51, Figures 1, 2, 3, and 4, on which is slidable the adjustable stop I06, also cooperate with the valve members I25 in providing ?ow rate stages in which such valve means may be operated and corresponding speed stages in which the force transmitter 19, Figure or cam follower member 66 connected to the 30 4, and the part 31, Figure 1, areadjustable. When the valve means is operated in an initial stage lower end of the lever 56 by means of a connect in which the Valve stem I36 thereof is depressed ing link I59. ‘This link I59 can thus be operated far enough for unseating only the associated ball by the lever 56 to adjust the follower 66 along I26, only a small maximum amount of fluid can the rod I51, the lever 56 being connected to the manual adjustable lever 54. It will thus be ap 35 flow past the valve means for introduction into and exhaust from respective ends of the cyl parent that movement of this follower 66 will inder to incur relatively slow movement of the be corresponding in amount to the amount of movement of the lever 54 over the quadrant 55. piston or force transmitter 19 and the tool or adjustable part 31. In certain installations such ture 18 is a guide pin I60 on which is supported 40 slight or micrometer adjustment of the tool is highly desirable, and in such installations it is, the free end of an elongated cam I6I having a also sometimes desirable to cause the tool to move cam slot I62 through which the pin I69 extends. at a relatively high rate of speed. With the The projection I69 has a flared outer portion present apparatus, the higher rate of movement I63 to positively hold the .cam I6I against lat eral de?ection. The back end of the cam I‘6I 45 is obtainable at will simply by moving the manual is connected to the piston rod 6I as indicated control lever to advance the cam fol1ower'66, Fig at I64 whereby it will be movable with the. piston ure 4, in the direction the cam member I6I is being moved by the force transmitter 19 but at rod and piston 19. The cam slot I62 has an in a greater speed, whereby the diagonal portion of termediate neutral portion I65 disposed angu larly with respect to o?set parallel portions I66 50 the cam slot I62 will be effective for depressing the valve stems I36 of the already opened valves and I61. It will be observed that the cam fol more distantly for likewise depressing the balls lower element 66 is folded about the rod I51 to be adjustably slidable thereon and has two op I28, the plungers I39, the pins I31‘), which will be thus ultimately engaged by the upper sides of posed depending portions I68 which straddle the cam I6I to support a pin I69 in the cam slot I62. 55 the oversize openings I316, and hence the valve members I25 for unseating said members I25 This pin I69 is arranged to ride in the cam slot from their seats I26 to place the valves in their I62 so that as the manually controlled lever 54 second operating stage having the much in is pivoted to adjust the cam follower 66 length wise of the rod I51, the pivoted structure or le creased flow rate. The ?ow rate in either range ver I41 will be pivoted on the pivot pins I5I and 60 is variable according to the speed at which the I52 to cause up or down movement of the arm manual control member is moved. For instance, while the apparatus is operating with only the I48, this being effected by the reaction of the pin I69 against the edges of the cam slot I62. balls I28 unseated, the distance they are un seated may be varied by slightly accelerating or The normal position of the follower 66 is that shown in Figure 4 but as it is adjusted rearward 65 decelerating the speed of the manually controlled ?nger grip lever 54. ly or to the left the pin I69 will ride upwardly on the inclined neutral portion I65 to effect hence the piston speed may be kept constant by downward movement of the arm I48 so that the moving the manual control lever 54 at such uni two inner plungers I39, Figure 5, will be oper form speed that keeps the pin I69, Figure 4, in ated. Should the operator move the follower ?xed relation with the diagonal cam slot portion so that the pin I69 moves downwardly along the I65 in which it is rideable, that is, to move the _ neutral portion I65, the upper edge of, the cam pin I69 in the same direction and at the same slot will pivot the structure I41 so that the arm speed at which the motor piston 19‘moves the I48 moves upwardly thereby operating the outer cam member I6I. If the manual control lever plungers I39. As this takes place the operation 75 is decelerated from this uniform speed, the cam Projecting laterally from the cylinder struc 2,409,510 11 12 member I6! will gain upon the pin I59 to allow the balls I28 to approach their seats, throttling the fuel ?ow and decreasing the piston speed. If the manual control lever is stopped, the neutral point of the diagonal slot in the cam member it! will immediately overtake the pin I58 to seat the balls I 28 and thus stop piston movement. Should the manual control lever be accelerated from said 0nd ?uid-operated device, not shown, for oper'; ating tools on the other side of the tractor. Fluid is supplied to this distributing valve and to this high pressure opening through a vertically ex tending opening or duct I12. Fluid is delivered from the pump source to the duct I12 through an attached coupling I13 which connects the supply hose 12 to the distributing valve 13. The uniform speed, the pin I69 would be advanced views in Figure 8 show the distributing valve with respect to the advancing diagonal cam slot 10 opened to illustrate the ducts and openings in portion I65 to further unseat the balls I28 from its two parts I14 and I 15, these views being ele their seats I29 to increase ?uid ?ow and piston vational views of the individual parts I14 and I15 speed. Thus, within a speed range variable from of which the latter is shown upside down in a zero to a maximum determined by the ?ow ca position adapting the parts to be folded upto pacity of the valve parts I28—I29, the manual gether to form the composite distributing valve control lever 54 is manipulatable at slow speeds 13. to select slow speeds of piston adjustment. This Fluid from the low pressure side of the ?uid slow speed of the piston is so coordinated with operated device or from the return hose coupling the speed of the lever 54 as to create the sensa 15 is returned to the distributing device through tion that the parts moved by the piston are moved 20 openings I16 and I11. The opening I11 is uti e?ortlessly by said lever. If the lever is accel lized for adjusting working tools at the side of the erated, decelerated, or stopped, a like instan tractor opposite to that shown in Figure 1. From taneous response is incurred by the piston and this opening I11 the returning ?uid will continue the parts it drives. Because of the small ?ow ca through a passage I18 in the distributing valve pacity of the valve parts I28——l29, the just ex 25 part I15 and thence upwardly through the pipe plained force transmitter or piston movement 5| to the reservoir 50. control is tantamount to a Vernier adjustment. Normally, ?uid under pressure is delivered to The speed at which the manual control lever the openings I10 and HI through a round open 54 is adjusted in either direction also controls ing I19 and a duct I80 (in the form of a groove the speed and direction of the motor piston dur in the ?at face of the part E14) which extends ing operation of the apparatus in the high speed between the two openings I10 and Ill. The path range, that is, while valve members I25, Figure 4, of ?uid through the distributing valve is that are un‘seated from their seats I26. The upper taken by the arrows I8I. When ?uid is not be limit of said range is determined by the flow ca ing delivered to the ?uid-operated device 62, the pacity of the valve parts I 25—I26 and the deliv 35 pressure in the duct I12 reaches su?icient mag~ ery capacity of the ?uid source, and the speed nitude that the ?uid flows vertically through said within said range is selected by adjusting the dis tance the part I25 is unseated in the manner de scribed above with respect to the balls I28. The control lever of course must be moved more rapid duct I12 to an opening I82 in the part I15 to react against and open a by-pass ball valve I83 which is normally retained against its seat I84 by a compression spring I85 and a Washer I86. ly while controlling the higher piston speeds. So Such ?uid that by-passes this ball valve 82 will long as this higher speed range limit is not ex be delivered through a duct I81 to the duct I 18 and from there returned to the ?uid reservoir. It ceeded the piston movement will be instantane ously responsive to speed and direction of the should be particularly apparent at this time that ?uid is kept under pressure within the high pres It is also important to note that the speed con sure passages I12 and I80 at all times and that trol is ideally responsive to the muscular re?exes from these passages ?uid pressure is extended to of an operator since it is natural for him to move the ?uid operated device whereby fluid is pro the control lever faster or slower as faster or vided under pressure at a location within the cyl slower movement of the motor piston is desired. 50 inder structure itself and within a short dis This operating characteristic of the apparatus is tance from the openings H0 and II I at the ends further highly desirable when ‘making micromet of the cylinder. In other words, ?uid under pres ric adjustments when the naturalv inclination of sure is always on tap for the ?uid operated an operator is to move the control lever with a devices. This adds to the sensitivity of the ?uid degree of slowness corresponding to the exactness operated device and makes possible the use of sought. Greater exactness is attainable in set the same for delicate adjustment of the working manual control lever. ~ ting the piston when it is moved slowly. tools. The distributing valve parts I14 and I15 Referring now to Figures 2 and 8 to 11, in are held together by bolts I88 shown in section in Figure 8. clusive, there is shown the distributing valve ar rangement to which ?uid is delivered from the 60 Associated on the quadrant 55 and pivoted at ?uid supply pump source under pressure and 58 is a gauge lever 21I . This lever is such that it distributed for supplying ?uid to two different fluid-operated devices, only one of which is shown. can be moved over the quadrant and selectively set thereon. Should the working tool be adjusted In these tractor-mounted arrangements it is cus in its working position and later ‘the same be tomary to have implements or working tools lo 65 raised to a position of transport on the tractor, cated at opposite sides of the tractors and it is said tool can be returned precisely to the said desirous that these working tools be operable working position by returning the control lever to independently of each other. For this purpose its initial position beside the lever 21L Thus, the there are often provided two different cylinder lever 21I serves as a tell-tale stop against which devices for actuating the different tools. As 70 the lever 54 can be set. viewed. in Figure 8, it will be noted that there The present apparatus makes expedient use of are two high pressure openings I10 and HI, The ?uid as a power transmitting medium for per pressure opening I10 is ‘for delivering ?uid to forming the actual work in manipulating and ad the ?uid-operating device 62, whereas the pres justing cumbersome or inaccessible parts or the sure opening I1I is for delivering fluid to a sec like under remote manual supervision. Said ap 2,409,510‘ 131' 14. from the tractor power plant, said motor being drivable ‘in opposite directions by respective paratus is especially adapted for power control of the working tools on a tractor. The design and modes of liquid introduction thereinto and be ing hydraulically lockable against drive in either .tools or the like to move substantially simulta Cl direction by precluding egress of such liquid therefrom, valve >means for controlling ingress neously with and precisely in accordance with the and egress of the liquid with respect to the mo movement of the manual lever 54. Any delay of tor, said valve means being settable in a neutral movement between the manual lever 54 and the condition to prevent such egress and alternatively working tool is practically imperceptible. In other words, the movement of the working tool 10 settable in delivery conditions which cause the introduction of ?uid into the motor for driving is as instantaneous as if a hand-operated adjust the same respectively oppositely, relatively mov ing lever were directly connected therewith. able valve means control counterparts of which Another important advantage of the present one is manually operated and the other driven ?uid control is its automatic restoration of the by the motor and cooperable for setting the valve force transmitter 19 to any position to which it means to cause the motor to eiTect drive in an has been set, should it drift from such position amount and direction correlated with the because of ?uid leakage at some point in the sys combination of the parts utilize high pressure ?uid in a manner causing the remotely controlled amount and direction of movement of the man tem as along the cylinder wall from one side of the ually operated counterpart and to hydraulically force transmitter to the other. Fortuitous drift 111g of the force transmitter in either direction will incur a movement of the diagonal cam slot [65 relatively to the pin I69 therein for setting the valve means to reestablish the fluid distribu tion in the cylinder and thus correct the force transmitter setting. Automatic corrections of this kind will occur at intervals determined by the speed at which an impairment or imperfec tion of the system may allow drifting of the force transmitter. lock the motor as aforesaid following completion of eachcorrelated movement; and means oper ably connecting said motor with said tool to re spectively raise and lower the same pursuant to driverof the motor in opposite directions, where by movement of the manual counterpart within one zone of its movement range can positively in our tool tillage depth adjustment correlated in direction and amount with the movement of the manual counterpart and whereby movement of While I have shown and described but a single " preferred embodiment, it should be understood said counterpart into another zone of its move ment range will incur movement of the tool into that many changes may be made in the construc the transport position. tion, details and arrangement of the parts with out‘departing from the spirit and scope of the present, invention or sacri?cing all of the ad 3. In a mechanical organization for the prac tice of a new tillage technique; a tractor; a til vantages thereof. What is claimed is: lage tool disposed on said tractor for movement between a lowered ?eld tillage position and an 7 I elevated transport position and for depth ad justment within the tillage position; a hydraulic tice of a new tillage technique; a tractor; a tillage power transmitting mechanism comprising a pump driven by the tractor engine, a control 1. In a mechanical organization for the prac tool disposed on said tractor for movement be tween a‘ lowered ?eld tillage position and an elevated transport position and for depth ad justment within the tillage position; a power transmitting mechanism, said mechanism in cluding a motor energized by power received from the tractor power plant, said motor being selec tively energizable for moving a work member thereof in either of opposite directions and effec tive to lock said work member against movement excepting during such energization, said mecha member manually movable in selective opposite directions, a ?uid-driven motor including a work member positively movable in either of opposite directions by selective directing of liquid into such motor from the pump and hydraulically lockable against movement in either direction at selective points in its path of movement by the trapping of liquid in said motor, valve means op erable under control of said manual control mem-v ber and of said work member to e?ect such di nism also including a control member movable recting and trapping of the liquid, connecting in either of opposite directions to incur energi zation of said motor for moving its work mem ber coordinately in direction and amount with the movement of such control member; and means connecting said work member with said means operably connecting said members with the valve means, said manual control member being operable through said connecting means tool to respectively raise and lower the same pur suant to the movement of the work member in opposite directions, whereby movement of the control member within one zone of its move ment range will positively incur tool tillage depth adjustment correlated in either didectio-n and amount with the movement of said member and whereby movement of the control member into to operate the valve means for directing the liq uid into the motor to initiate an ensuing move ment of the work member correlated in direction with the direction of the control member move ment, the work member being operable through 60 said connecting means to operate the valve means for hydraulically locking the said work member incident to its said ensuing movement reaching an amount correlated with the amount of con trol member movement; and means connecting another zone of such movement range will incur 85 said work member with said tool for raising and lowering the same pursuant to movement of said movement of the tool into the transport position. work member in its respectively opposite direc 2. In a mechanical organization for the prac tions, whereby movement of the control member tice of a new tillage technique; a tractor, a tillage within one part of its movement range will posi tool disposed on said tractor for movement be tween a lowered ?eld tillage position and an ele 70 tively incur tool tillage depth adjustment corre lated in either direction and amount with the vated transport position and for depth adjust movement of such control member and whereby ment within the tillage position; a hydraulic movement of the control member into ‘ another power transmitting mechanism including a hy part of its movement range will incur movement draulic motor into which propelling liquid for driving the same is introduced by power obtained 75 of the tool into the transport position, and said 15' 2,409,510 connecting means between the valve means and said control member being constructed and ar 16 ' 5. In a mechanical organization for the prac tice of a new tillage technique; a tractor; a tillage ranged to accommodate instantaneous manual tool disposed on said tractor for movement be movement of the control member selectively in tween a lowered ?eld tillage position and an ele its range in advance of the ensuing correlated 5 vated transport position and for depth adjust movement of the tool at a speed functional of ment Within the tillage position; a hydraulic liquid delivery to the motor. power transmitting mechanism including a hy 4. In a mechanical organization for the prac draulic motor into which propelling liquid for tice of a new tillage technique; a vehicle having driving the same is introduced by power obtained an associated power plant from which power is 10 from the tractor power plant, said motor being obtained for propulsion of such vehicle across drivable in opposite directions by respective a tillable ?eld; a tillage tool on said vehicle for modes of liquid introduction thereinto and being movement between transport and soil-working hydraulically lockable against drive in either positions and for depth adjusting movement direction by the preclusion of egress of such within the soil-working position; and a hydrau 15 liquid therefrom, valve means for controlling in lic system for effecting and controlling such tool gress and egress of the liquid with respect to the - movements, comprising a hydraulic pump driven motor, said valve means being settable in a neu from said power plant, a fluid-driven motor in tral condition to prevent such egress and alterna cluding a work member connected with said tool tively placeable in delivery conditions which and movable in opposite directions to respective 20 cause the introduction of liquid into the motor for ly lower and raise the same, said Work member driving the same respectively oppositely, said being subjectable to liquid columns at opposite valve means including successively operable sides thereof to alternately drive the same in stages of relatively small and large ?ow capacity opposite directions by the alternate application and being controllable to vary the rate of ?ow in to said columns of the pressure of liquid from 25 each stage, and valve-operating means including said pump while the other of said columns is al a manual component manipulatable for placing lowed to exhaust, and valve means disposed be the valve means in selected of said delivery con tween said pump and said motor, said valve ditions to determine the direction of motor drive means comprising independently movable coun and a component driven by the motor for re terparts disposable in a neutral setting relatively 30 setting the valve means to the neutral condition, to one another to condition the valve means for said valve-operating means components being preventing exhaust of either of said liquid col cooperable for rendering the flow capacity stages umns from the motor to thus hydraulically lock of either delivery condition as Well as the flow said work member, one of said counterparts being rate within the selected stage selective under manually movable from the neutral setting to 35 control of said manual component for causing manipulate the valve means for selectively sub the motor to drive at desired speeds in direction jecting said liquid columns to the pumped liquid and distance correlated with the speed, direction, while connecting the nonsubjected column with and distance of the manual component manipu exhaust, and the other of said counterparts be lation; and means operably connecting the mo ing connected for movement with the work mem 40 tor with said tool to raise and lower the same ber in its ensuing movement to reestablish the pursuant to and in accordance with the speed neutral setting of said counterparts upon move and distance of drive of the motor in its re ment of the work member and tool an amount spective opposite directions. correlated with the amount and direction of movement of the manually moved counterpart. CARL W. MOTT.