US1905524A

US1905524A - Cultivator

Info

Publication number: US1905524A
Application number: US298199A
Authority: US
Inventors: Carl G Strandlund
Original assignee: Deere and Co
Current assignee: Deere and Co
Priority date: 1928-08-08
Filing date: 1928-08-08
Publication date: 1933-04-25
Anticipated expiration: 1950-04-25

Description

April 1933- c. G. STRANDLUND CULT IVATOR Filed Aug. 8, 1928 4 Sheets-Sheet l Wilingss April 25, 1933. c. s. STRANDLUND Filed Aug. 8, 1928 4 Sheets-Sheet 2 a g WW a Ni mass Ap 1933- 'c. G. STRANDLUND GULTIVATOR Filed Aug. 8. 1928 4 Sheets-Sheet 5 T. U m

FMW WQVMM it OTTLQ S April 1933- c. G. STRANDLUND 1,905,524

CULTIVATOR Filed Aug. 8, 1928 4 Sheets-Sheet 4 I 4 Mi l Wi li-5 ail!" fmfengr I Patented Apr. 2 5, 1933 e sra'r rice CARL G. STRAND'LUND, OF MOLINE, ILLINOIS, ASSIGNOR T'O DEERE & COMPANY, OF

MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS I CULTIVATOR Application filed August 8, 1928. Serial No. 298,199.,

The present invention relates to cultivators, particularly of the horse-drawn type.

One of the principal objects of the invention is to provide an improved construction of cultivator, in whichthe operation of raising the rigs can be more easily performed, and in which such operation does not disturb the balance of the cultivator. The construction whereby this is obtained comprises generally a wheel frame constituting one tiltable unit of the cultivator which is adapted to swing forwardly and downwardly around the pivot axis of the cultivator wheels, and a combined pole and seat support constituting the other tiltable unit ofthe cultivator, which is adapted to swing downwardly around the point of support in the neck yoke at the front end of the pole. Thesetwo tiltable units are pivotally connected together on a pivot axis which is disposed in front of the transverse axis of the wheels, so that these two units can fold downwardly at said pivot axis.

Such downward folding motion is operative to raise the cultivator rigs out of the ground, the latter swinging upwardly and rearwardly as the wheel frame swings downwardly and forwardly. In such operation, the seat support swings downwardly around the point of support of the pole in the neck yoke, so that the operators weight tends to counterbalance the weight of the rigs and prevents the front end of the pole swinglng upwardly in the neck yoke and thereby dlsturbing the balance of the cultivator.

A further object of the invention is to pro vide improved means for effecting levelling adjustments in a cultivator of the above description, so that the cultivators at the front and rear ends of the rig beams will all cultivate to the same depth. Such levelling adjustments are obtained by vertical angular adjustments between the pole and seat support or seat frame, these angular adjustments occurring about a pivot axis disposed in front of the pivot axis on which the wheel frame is connected to the seat support.

A further object is to provide a cultivator of the above description, wherein steering of the implement in following deviations in the plant row is accomplished by angling movement of the wheels relatively to the frame. In this regard, another object'of the inventionis to provide a cultivator of the above description, wherein the cultivator rigs are displaced transversely with a parallel shifting movement in the operation of steerin the cultivator through angling of the pivoted wheels.

Other objects of the invention are to provide an improved arrangement of independent depth adjusting levers for each of the rigs to provide a readily adjustable construction which can be quickly and easily adapted to different row spacings; and to improve upon cultivators generally in features which will be hereinafter pointed out in the following detailed description of a preferred embodiment of my invention. In the accompanying drawings illustrating such embodiment: I

Figure 1 is a plan view of the cultivator;

Figure 2 is a longitudinal sectional view through the implement, taken on the line 2-2 of Figure l, and illustrating the rigs lowered to cultivating position; 7

Figure 3 is a view similar to Figure 2, illustrating the rigs raised to transport position;

Figure 4 is a longitudinal sectional view taken on the plane of the line lt of Figure 1 and illustrating the rigs lowered to cultivating position, and

Figure 5 is a transverse sectional view taken approximately on the plane of the line 55 of Figure 1. v

Figure 6 is a fragmentary view illustrating the adjustment for tread spacing.

The pole of the implement is indicated at 8. Extending rearwardly, substantially in prolongation thereof, is the seat frame or seat structure comprising two bars 9, 9, on the parallel rear ends of which is mountedthe seat 11. The front ends of the seat frame bars are pivotally connected to the sides of the pole 8 on a pivot bolt 12 extending transversely through the bars and through the pole. As shown in Figure 1, the seat bars 9 diverge rearwardly and outwardly from the pivot bolt 12 for effecting pivotal attachment to the wheel frame at widely spaced points, as I shall presently describe. Except when levelling adjustments are being made, the seat bars 9 constitute a rigid continuation of the pole 8, both swinging upwardly and downwardly as a unit in the normal operation of the cultivator around the point of support of the front end of the pole in the neck yoke of the team. VVhenit is desired to level the rigs to dispose the front and rear cultivator shovels at the same depth, a vertical angular adjustment is efi'ected between the pole 8 and seat bars 9 at the pivot axis 12, the same being accomplished through actuation of a tilting or levelling lever 13, as I shall presently describe.

The other tiltable section or wheel frame unit of the implement comprises a wheel frame indicated generally at 14, the same being mounted on the two side wheels 15. Such frame comprises a transversely extending rear bar 16 to the end portions of which are bolted two laterally spaced forwardly extending bars 17. The front ends of said latter bars extend between two

front frame bars

18, 18 which are disposed one above the other in spaced relation and which extend transversely of the implement. The longitudinally extending bars 17 project forwardly between the upper and lower

transverse bars

18, 18, and where they pass between said transverse bars they are rigidly secured thereto by

brackets

19 and 21. The brackets 19 are disposed on the front sides of the two

transverse bars

18, 18, being disposed in pairs and extending vertically between the a transverse bars v18, 18' to which they are bolted or otherwise secured; Each longitudinal frame bar 17 in extending forwardly between an individual pair of such brackets is connected thereto by a transverse bolt 22 extending through aligned holes in the bracket and in the bar 17. Each bar 17 also'has a second point of attachment to the

transverse bars

18, 18, such consisting of the brackets 21 which are similar to the brackets 19 and which are disposed singly on the rear sides of the frame bars 18, 18'. The longitudinal frame bars are secured to these rear brackets 21 by bolts or rivets, from which it will be seen that the wheel frame 14 consists'of a rigid rectangular'structure built up of the transverse rear bar 16, of the two longitudinal side bars 17 and the vertically spaced

transverse front bars

18, 18.

Said frame is mounted on the two side wheels 15 through long vertically extending sleeves 24, in which the upright wheel standards 25 are rotatably journalled. Each of these wheel standards extends out from the lower end of the sleeve 24 and has an outwardly projecting axle portion 26, on which the associated wheel 15 is j ournalled. It will be evident that rotation of both wheel standards 25 in their respective sleeves 24 will result in the two wheels 15 being angled relatively to the frame for guiding the implement in one direction or the other; Each sleeve 24 is secured to the wheel frame 14 by an arm 27 which extends upwardly and forwardly from the upper end of the sleeve 24 and has a flanged socket (Figure 3) for slipping over the end of the frame bar 16. The arm is secured to said frame bar by a bolt 28 passing through aligned holes in the arm and bar. Referring to Figure 1, it will be seen that the longitudinal frame bars 17 have their rear ends turned outwardly along the front side of the transverse frame bar 16, as indicated at 17, and the bolts 28 also, extend through the outwardly bent ends. The arms 27 the frame bar Mind the bar portions 175 are provided with a plurality of spaced holes therein for receiving the bolt 28 at difierent points along the length of the frame bar.16,

in order that'the wheel supporting arms 27 r can be shifted inwardly or outwardly relatively to the frame for adjusting thethread spacing between the wheels 15.

As shown in

F'gures

1 and 5, the two bars 9 of the seat frame extend through the opening between the upper .and

lower front bars

18, 18 of the wheel frame. The two frames are pivotally connected together at this point. The bars of the seat frame extendbetween the pairs of brackets 19, alongside the bars 17 of the wheelframe, and have pivotal mounting between said brackets on the aligned transverse bolts 22, the seat bars, however, having noconnection with the rear brackets 21. Thus, the one tiltable unit or structure consistingof the pole 8 and seat frame 9, and the other tiltable unit or structure consisting of the wheel frame 14, are pivotally connected together on this transverse pivot axis 22 so that these two units can pivot upwardly or downwardly at such point with a jack-knife folding moti0n.' Figure 2 illustrates this pivot axis raised with the wheel/frame approximately in alignment with the pole 8 and Figure 3 illustrates the structure folded downwardly with the wheel frame extending at a considerable angle to the pole 8. The latter position corresponds to a raised condition of the cultivator rigs, and it will be noted that in moving to such position, the wheel frame swings forwardly and downwardly around the wheel axis 26 as a center, whereas the pole 8 and the seat frame 9 swing downwardly as a rigid unit around the point of support of the pole in the neck yoke as a center. The upward and downward folding of these two units is controlled by lifting mechanism comprising a lever 31 which is pivotally connected at 32 to a bracket 33 which is secured to the longitudinal frame bar 17 at one side of the wheel frame. Said bracket is arched in the form of a latching sector having one edge curved concentrically of'the pivot 32, and

this has an upper notch 34 and a series of lower closely spaced notches 34 in which a spring pressed dog on lever 31 is adapted to engage. The housing on the lever in which this dog slides carries a pivot 35 to which one end of a link 36 is connected. The other end of said l nk is pivotally connected at 37 to an arm 38 which has its lower end rigidly secured to one end of atransverse rock shaft 39. i 7

This rock shaft is journalled in bearing plates 41, which are secured to and extend upwardly from the longitudinal side bars 17 of the wheel frame. Two arms 42 are secured to said rock shaft approximately above the seat frame bars 9, and pivotally connected to the forward ends of these arms are links 43 which extend downwardly and have pivotal connection with both seat frame bars 9 at 44. It will thus be seen that with the lifting lever 31 in the position illustrated in Figure upward and forward movement thereof will pull forwardly through the links 36 and arms 33 to rock the shaft'39 in a counterclockwise direction, thereby thrusting downwardly through the links 43 and causing the wheel frame and seat frame to fold downwardly at the pivot axis 22 to substantially the position illustrated in Figure 3. Pulling downwardly and rearwardly on the lever 31 restores the pivot aXis22 to its for mer height and brings the two frames 9 and 14 back to approximately the position illus trated in Figure 2. The arm 38 through which the rocking motion is transmitted to the shaft 39 also serves to support one of the independent depth adjusting levers, as I shall presently describe.

Under normal operating conditions, the seat frame 9 constitutes a rigid extension of the pole 8. lVhen it is desired to level the rigs or to otherwise adjust the depth relation between the front and rear cultivator shovels such is accomplished by actuating the levelling or tilting lever 13 which causes angular movement between the pole 8 and frame 9, around the pivot 12. Said lever is pivotally mounted at 46 on a bracket 47 which is secured to a plate 48 bolted to the top of the pole 8. The bracket 47 is curved in the form of a latching sector, having notches therein for receiving a latching dog on the lever 13, as indicated at 49.

A link '51 is pivotally connected to the lever 13 at 52, and has its lower end pivotally connected at 53 to a channel-shaped bracket 54 which is secured to the transverse frame bars 18, 18' at the center of the frame. The plate or bar 48 on the upper side of the pole 8 extends backbetween the side flanges of the channel bracket 54, having vertically guided engagement tl'ierebetween to reinforce the pole against lateral twisting movement relative to the seat frame and wheel frame. The pivot 53 is substantially aligned with the transverse pivot axis 22 and the effect is practically the same as connecting the link 51 directly to one ofthe seat frame bars 9. When-the leveling lever 13 is rocked downwardly, the link 51 will act as a fulcrum so that the rear end of the pole will be raised, by virtue of its connection at 46 with the lever 13. Raising the rear end of the pole will, due to the pivotal connection at 12 of the seat frame with the pole and the connection of the wheel frame with the seat frame through shaft 39, arms 42 and links 43, raise the forward ends of the seat frame and the wheel frame respectively, thus causing them to turn angularly, clockwise as viewed in Fig. 4, forcing the rear cultivator shovels deeper into the ground. The weight of the. operator on seat 11 is thus effective to aid in forcing the rear cultivators deeper into the soil. Swinging the lever 13 upwardly in the opposite direction tends to lower the pivot 12 and hence rocks the wheel frame forwardly and downwardly to cause the front shovels to penetrate to a greater depth. It will thus be observed that inasmuch as the wheel frame 14 and seat frame 9 are locked together at this time through the latched engagement of the lifting lever 31 with its latching sector 33, the tilting movement of the pole 8 results in the angle of said pole being changed both with respect to the seat frame 9 and wheel frame 14. Such levelling adjustment between'the pole and the frames serve to compensate for different elevations of the frontend of the pole when hitched to horses of difierent height and also serves to adjust the depth relation of the front and rear shovels when cultivating up or down slopes, etc. The lever 13 is therefore termed a leveling lever since, as explained, it is adapted to function in adjusting the cultivator shovels to a position where the front and rear shovels are level.

' During the adjustment effected by use of the leveling lever 13 it will be observed that.

the seat frame and wheel frame move together as a rigid unit, and that when the lifting lever 31 is actuated the pole and seat frame move together as a rigid unit.

The rig beams may be constructed of pipe sections or of bar sections, the drawings illustrating the latter construction. As best shown in Figure 1, each rig beam comprises two

bars

55, 55, which extend substantially parallel throughout the greater portion of their length and have their rear ends bent outwardly and secured together. The cultivator tools 56 are mounted on standards 57 which are secured to the beam bars by adjustable clamps 58., The upwardly bent front ends of the beam bars are secured to arms 59, the upper ends of which are pro vided with hubs 61. which are rotatably mounted on the transversely extending bar or shaft 62. The opposite ends of this rig supporting member 62 aremounted in the yoke shaped-ends 63 of steering arms 64 extending forwardly from the wheel standards 25. As shown in Figure 1,.the; rear end of each steering arm 64 has a squared socket which engages over the squared upper end of the adjacent wheel standard 25, above the guide sleeve 24, so that lateral swinging movement ofthe front ends of said arms '64 will cause corresponding'rotative movement of the two wheel standards25 in the sleeves 24 for turning the wheels 15in one direction or the other. A diagonal brace rod 65 extends upwardly from the lower portion of each wheel standard and is secured to the front portion of the steering arm 64. The yoke-shaped front end of each steering arm is pivotally connected to the transverse bar 62 by a pivot bolt 66' which extends; through the two arms of the yoke and through the bar. The latter has a plurality of spaced holes 67 therein for receiving the pivot bolt 66 at different points along its length, the pivot bolt being shifted to difierent ones of these holes with the inward or outward shifting of the arm 27 of the'sleeve 24 along the transverse frame bar 16, such latter adjustment being forthe purpose of varying the tread spacing between the wheels 15, as-previously described. 7

The front ends of the steering arms 64 have rolling support between the

front bars

18, 18 of the wheel frame as best shown in Figure 5.. Two angle clips 68 are secured to the upper side of each steering arm and have upwardly extending ends disposed on opposite sides of the lower frame bar 18 to form a yoke in which a roller 69 is pivotally mounted for rolling-between the upper and lower frame bars 18, 18'.

Steering movement is transmitted to the transverse bar 62 through two steering pedals 71, 7 which are disposed in convenient proximity to the operators seat 11. As shown in Figure 2, each of these pedals is pivotally supported intermediate its ends on the adjacent seat frame bar 9, on the pivot 72, and the upper ends of both pedal levers are linked to the opposite ends of a chain 73. The end portions of this chain extend between the upper and

lower bars

18, 18 of the wheel frame and pass around sheaves 74 pivotally mounted in inclined brackets 75, which are secured to the front sides of said frame bars 18, 18. The intermediate portion of the the chain extending between these sheaves has linked attachment to a stud or finger 76 projecting upwardly from an intermediate point of the cross shaft 62 (Figure 3). It will be evident from the foregoing that pressure exerted on either pedal 71 or 71 will swing the wheels to deflect the cultivator in that direction, viz., ,a forward stroke, for example, on the left-hand pedal 71 will pull rearwardly on this end .of the chain 73, causing the transverse shaft 62 to be shifted to the left and swinging the front ends of the steering arms 64 to the left for turning the wheels in that direction. In such 'movement, the front ends of the steering concurrently with the angling of the wheels,

which facilitates quick maneuvering and dodging in following the plant rows.

Draft is transmitted to the implement through singletrees (not shown) which have linked connection with two pendant draft bars 78 hanging down on opposite sides of the pole 8. The upper ends of these pendants havepivotal mounting on the ends of a transverse evener bar 79. The latter extends under the pole 8 and an arched bar 81 which has its ends secured to the evener bar 79 extends over the upper side of the pole, both bars being pivotally connected to the pole on the vertical pivot bolt 82. Chains 83 extend from the lower ends of the pendant bars 78 and connect to arms 84 which are secured to the rig beam bars 55.

Independent adjustments of the two rig beams are established through manipulation of the two, independent depth adjusting levers 86, 86. The lever 86 is pivotally mounted at 87 on the arm 38, and the other lever 86 is similarly mounted on a duplicate arm 38 (Figure 4) which is secured to the opposite end of the rock shaft 39. Both of these arms are formed with downwardly curved upper ends in which are provided notches for receiving the latching dogs with which the

levers

86, 86 are provided. The notched sector formation 88 of each arm 38 is curved concentrically of the pivot bolt 87. Each of these depth adjusting levers is of bell-crank formation, having a rearwardly extending arm 89 from which a rod 91 extends downwardly to the adjacent rig beam.

Here this rod passes through an angle clip 92 which is pivotally connected at 93 to the beam bar 55. As shown in Figure 2, a transverse pin 94 in the end of the rod 91 engages the under side of the clip 92 and limits upward movement of the rod relatively to the clip while permitting downward movement thereof. A compression spring 95 is confined on each rod 91 between the top of the clip 92 and an adjustable collar 96 which is secured to the rod. l/Vhen said rods are thrust downwardly for forcing the cultivator shovels 56 into the ground, the pressure applied to said rods is transmitted to the rig beams through the springs 95 so that if theshovels are encounteringhard ground or an obstruction, the spring will yield and thereby prevent breakage of the operating parts. On the other hand, when the rods 91 are pulled upwardly, for raising the rig beams, the pins 9 1 engage the clips 92 and positively lift the rig beams.

In the operation of the implement, the lever 31 functions primarily as a lifting lever for raising the cultivator shovels clear of the ground, but said lever also serves as a master depth adjusting lever for controlling the height of both rig beams when in cultivating position. That is to say, movement of said lever over that portion of its latching sector represented by the several lower notches 34 transmits movement through'the link 36 and arm 38 to the rock shaft 39, thereby swinging both arms 38 and 38. Inasmuch as the independent depth adjusting levers 86 and 86 are latched'in rigid relation to these arms 38, 38, the swinging movement of said arms will be transmitted through said levers and through therods 91 for raising or lowering the rig beams, theforward ends of which pivot in such adjustment around the transverse .shaft 62.

Such rocking of the rock shaft 39 incident to the depth adjusting actuation of the lever 31 also causes a limited degree of pivotal folding motion between wheel frame 1% and seat frame 9, with the result that the forward or backward oscillation of the wheel frame will lower or raise the rig supporting shaft 62 and thereby aid in giving the desired depth adjustment to the rig beams. When it is desired to raise or lower one rig beam relatively to the other, the associated

lever

86 or 86 is released from its latching sector 88' and is actuated relatively tothe arm 38 or 38 for independently raising or lowering the rig beam as desired. When it is desired to level the implement or to adjust the depth relation between the front and rear shovels, the lever 13 is actuated to tilt. the pole 8 relatively to the rest of the implement. As previously described, actuation of said lever causes swinging movement of the pole relatively to the pivot axis 12, thereby varying the angular relation between said pole and the wheel and seat frames 14 and 9 respectively. Inasmuch as the front end of the pole is supported at a fixed height in the neck yoke of the team, such change in angular relation tends to tip the wheel frame 14 either forwardly or backwardly and hence serves to raise or depress the front or rear shovels, as desired.

In raising the rigs at the end of the field, the lever 31 is swung upwardly to engage its latch in the uppermost notch 3 1 of the latching sector 33. The resultant rocking of the shaft 39 has the two-fold action of foldingthe two frame structures downwardly at the pivot ax s 22, and also of pulling upwardly on both rods 91 for transmittingaccelerated lifting movement to the rig beams.

In effecting this foldingmovement between the wheel frame 14 as oneunit and the pole 8 and seat frame 9 as the other unit, it will be noted that'the weight of the rear end of the pole and the weightof the forwardly projecting wheel frame both act downwardly at the pivot axis 22, tending to swing this pivot center downwardly. To the weight of the rear end of the pole 8 is also added the weight of the operator transmitted through the seat 11 and seat frame 9 to the rear portion of the pole, this additional weight also tending to swing the pivot center 22 downwardly. It will thus be seen that all of these forces act together to counterbalance the rear- Wardly extending weight of the rigs when raised from the ground. The pressure exerted downwardly through the operators seat 1 is also accentuated in the rig lifting operation owing to the fact that the operator is, at this time, thrusting upwardly on the lever 31 which reacts as a downward pressure through the seat frame. With the downward folding movement between the two pivotally connected units, some downwardly acting pressure is still transmitted to the front end of the pole 8 so that this end of the pole does not swing up in the neck yoke when the ri s are raised. As the two frame units fold downwardly, the seat 11 descends, but inasmuch as the seat frame constitutes a rigid part of the pole 8 at this time, the seat only swings down through the comparatively small angular movement of the pole, and hence irrespective of whether the rigs are raised or lowered, the operators position is never uncomfortable. Simultaneously with the downward swinging movement of the rig supporting bar 62 with the downward folding movement between the frames, the lever arms 89 are swinging upwardly as rigid extensions of the arms 38, 38.

Such swinging movement of these lever arms is comparatively rapid and transmits a rapid lift to the rear ends of the rig beams through'the rods 91. Thus, the rig beams are swung upwardly with an accelerated movement exceeding the tilting movement of the wheel frame 1%. The upward movement of the rig beams is also aided by a counterbalancing spring 97 which link is-connected at 98 to the rock shaft arm 38' and which has its front end connected to an adjustable bolt 98 attached to the wheel frame bar 18. In returning the rigs to cultivating position, the reverse. of the above action occurs, the two pivotally connected units of the frame structure swinging upwardly with a folding movement about the pivot axis 22 and the lever arms 89 swinging downwardly to lower the rear ends of the rig beams. It will be noted that in this operation of restoring the rig beams, the operator is exerting a pull on the lever 31 and is, therefore, lifting some of his weight off the seat 11, which reduces the effort necessary to swing the seat frameand wheel frame upwardly to their former 0perative positions.

The manner of steering the wheels 15 and laterally deflecting the beams in dodging variations in theplant row, will be understood from the previous description in connection with the steering

pedals

71, 71. The hubs 61 which pivotally support the front ends of the rig beams on the rig supporting bar 62 are held against lateral shifting along said bar by adjustable collars or other suitable means which is capable of adjustment to change the spacing between the rig beams.

While the foregoing construction "constitutes the preferred embodiment of my invention, neverthelessit will be understood that such embodiment is merely exemplary and that numerous modifications and rearrangements may be made therein without departing from the essence of the invention.

I claim:

1. In a cultivator, the combination of a pair of wheels, a wheel frame tiltably mounted thereon, a seat frame having a seat thereon, pivot means connecting said frames on a transverse pivot axis disposed in a plane spaced longitudinally from the axis of said wheels sufficient to l cause the seat to shift vertically through a distance at least substantially equal to the distance said wheels shift longitudinally, means for permitting vertical folding movement between said frames at said axis, a pole, means for normally holding said pole in substantially fixed relation to said seat frame so that said pole moves therewith as a unit in the relative folding movement between said frames,and cultivator rigs carried by said wheel frame. 7

2. In acultivator, the combination of a wheel frame unit mounted on side wheels, a pole and seat frame normally connected together for movement as a rigid unit, said wheel frame unit being pivotally connected to said pole and seat frame unit for relative folding movement between said units about a transverse axis disposed forwardly of the axis of said side wheels so that as said fold'' ing movement occurs the seat frame moves downwardly a substantial amount as the side wheels move rearwardly, cultivator rigs carried by one of said units,'and means for raising and lowering said rigs relatively to said latter unit.

3. In a cultivator, the combination of a wheel frame mounted on side wheels, a pole and seat frame unit pivotally connected with saidwheel frame to turn about a transverse pivot axis which is disposed forwardly of the wheel axis, cultivator rigs pivotally mounted on the wheel frame, rig lifting mechanism for effecting relative angular movement between said wheel frame and pole and seat frame unit, at said transverse pivot axis, and means operative with said relative angular movement for swinging said cultivator rigs verticallyrelatively to said wheel frame. 7

relatively to each other, cultivator rigs Carried on said wheel frame, and means actuated by operatlon of said lifting lever for swing.- lng said cultivator rigs vertically relatively to said wheel frame.

5. In cultivator, the combination of a pair of side wheels, :1 wheel frame mounted thereon, a seat frame pivotally connected with said wheel frame to turn about a transverse pivot axis disposed forwardly of the wheel centers, a pole pivotally connected with said seat frame on a transverse pivot axis disposed forwardly of said first-named pivot axis, a lifting lever operatively connected to effect angular folding movement between said frames at said first-named pivot axis, said seat frame and pole moving substantially as a unitin said pivotal folding movement between the frames, a level ling lever operatively connected to efiect ver tical angular adjustment between said seat frame and pole atsaid second-named pivot axis, cultivator rigscarried on said wheel frame, and means actuated by operation of said lifting lever for swinging said cultivator rigs vertically relatively to said wheel frame.

6. In a cultivator, the combination of a pair ofside wheels, a wheel frame mounted thereon. a seat frame pivotally connected with said wheel frame to turn about a transverse pivot axis disposed forwardly of the wheel centers, a pole pivotally connected with said seat frame on a transverse pivot axis disposed forwardly of said first-named pivot axis, a lifting lever operatively connected' to effect vertical folding movement between said frames at said first-named pivot axis, said seat frame and pole moving substantially as a unit in said pivotal folding movement between the frames, a levelling lever operativcly connected to effect vertical angular adjustments between said seat frame and pole at said second-named pivot'axis, a plurality of cultivator rigs carried on said wheel frame, independent depth adjusting levers for said cultivating rigs, and means actuated by opcration'of said lifting lever or transmitting motion through said independent depth adjusting levers to swing said cuitivatorrigs vertically relatlvely to said wheel frame when said frames are adjusted angularly relatively to each other.

7. In cultivator, the combination of a pair of side wheels, 21 wheel frame mounted thereon,- a seat frame pivotally connected with said wheel frame to turn about a transverse pivot axis disposed forwardly of the wheel centers, :1 rock shaft mounted on one of said frames, means operatively connecting" said shaft with the other of said frames, whereby rocking movement of said shaft causes relative angular movement between said frames, a pole adjustably connected with said seat frame, a plurality of cultivating rigs pivotaily connected at their forward ends to one of said frames, and independent depth adjusting levers for each of said cultivating rigs, said depth adjusting levers being operatively connected with said rock shaft to swing therewith.

8. In a cultivator, the combination of a pair of side wheels, a wheel frame mounted thereon, a seat frame pivotally connected with said wheel frame to turn about a transverse pivot axis disposed forwardly of the wheel centers, a roclrshaft mounted on one of said frames, means operatively connecting said shaft with the other of said frames, whereby rocking movement of said shaft causes angular adjustment between said frames about said transverse pivot axis, a lifting lever operatively connected to rock said shaft, a pole pivotally connected with said seat frame on a transverse pivot axis disposed forwardly of said first-named pivot axis, a levelling lever operatively connected to'effect relative angular adjustment between said seat-frame and-said pole, a pair of cultivator rigs pivotally connected at their forward ends with said wheel frame, and mechanism for causing the rear ends of said rigs to swing vertically with the rocking movement of said shaft, said mechanism comprising an independent depth adjusting lever for one of said rigs;

9. In a cultivator ofthe class described, the combination of a pair of side wheels, a wheel frame tiltably mounted thereon and extending forwardly from the axis of said wheels, a seat frame pivotally connected with said wheel frame on a transverse pivot axis disposed forwardly of the wheel axis, a seat mounted on said seat frame in rear of the wheel axis, a rock shaft mounted on said wheel frame, link mechanism operatively connecting said shaft with said seat frame whereby rocking movement of said shaft causes relative angular movement between said frames about said transverse pivot axis, a lifting lever operatively connected to rock said shaft, a pole pivotally connected with said seat frameon a transverse pivot axis disposed forwardly of said first-named pivot axis, a. levelling lever operatively connected to effect relative angular adjustment between said seat frame and said pole, a transverse rig supporting b-ar carried by the front portion of said wheel frame, a pair of cultivator rigs mounted at their front ends on said rig supporting bar, said rigs having vertical pivotal movement relatively to said wheel frame, arms operatively connected to swing with said rock shaft, lifting rods connected with the rear portions of said cultivator rigs and operatively connected with said arms, and an independent depth adjusting lever interposed between one of said rods and one of said arms.

10. In a cultivator of the class described, the combination of a'pair of side wheels, Wheel standards extending upwardly therefrom, a wheel frame comprising sleeves in which said wheel standards are journalled, the front portionof said wheel frame comprising vertically spaced transverse bars, a seat frame extending between said bars, pivot means pivotally connecting said wheel frame and said seat frame together on a transverse pivot axis disposed forwardly ofgthe axis of said wheels, a lifting lever operatively connected to effect vertical folding movement between said frames at said transverse pivot axis, a pole pivotallyconnected with said seat frame'on a transverse pivot axis disposed forwardly of said first-named pivot axis, a levelling lever operatively connected to effect vertical angular adjustments be tween said pole and seatframe' at said secondnamed pivot axis, steering arms secured to said Wheel standards and extending forwardly therefrom, roller means mounted on said steering arms and having rolling support on one of the front transverse bars of said wheel I frame, a transverse rig supporting bar mounted on said steering arms, cultivator rigs having their front ends connected with said rig supporting bar, and steering pedals operatively connected to transmit lateral shifting movement to steering arms.

11. A cultivator comprising tllG'COlDblIlltion of a pole, a wheel frame, a seat frame said rig supporting, bar to shift said rigs and also swing said normally adapted to be carried rigidly with the pole, said seat frame being pivotally connected with the wheel frame at its forward end for movement about a fixed pivot and said wheel frame being provided near its rearward and downward portion with side wheels, cultivator rigs carried by and movable with said wheel frame, and means for controlling the pivotal movement of said wheel frame relative to the pole and seat frame, said fixed pivot being disposed at least as far forward of the axis of said wheels as it is above said axis, wherebyas the wheel frame pivots rearwardly said seat frame moves downwardly a substantial amount.

12. A cultivator comprising the combination of a pole, a seat frame normally adapted to be carried rigidly with thepole, a wheel frame pivoted to said seat frame and pole for movement about an axis at its forward end and provided near its rearward and downward portion with side wheels, said axis being in a plane disposed forwardly ofsaid wheels, cultivator rigs carried by and movable bodily withsaid wheel frame, means to adjust the position of each rig on said wheel frame, and means to control the pivotal movement of thewheel frame relative to the pole and seat frame; V

13. A cultivator comprising thercombination of a pole, a seat frame pivoted to the pole, means to adjust the relative angular position of the pole and the seat frame, a wheel frame pivoted to the seat frame and having side wheels mounted thereon, and means to adjust the relative angular position of the wheel frame and the seat frame, said frames moving as aunit when said first mentioned means is actuated and said pole and seat frame moving as a unit'when saidsecond mentioned adjusting means is actuated.

V .14. In a cultivator, the combination of a wheel frame having supporting wheels and cultivator rigs, a pole and seat frame adapted to be rigidly connected togetherto move as a unit angularly about a transverse axis on the wheel frame and substantially forward of the axis of the supporting wheels, so that when said wheel frame pivots about said axis said wheels move rearwardly and said axis moves downwardly whereby the weight of the operator aids in lifting the rigs, means to adjust the position of said rigs on said wheel frame, and means to swingthe wheel frame about its pivotal axis.

15. In a cultivator, the combination of a pole and seat frame unit, a wheel frame having supporting wheels and cultivator rigs and connected to said unit to move abouta transverse axis substantially forward of the axis of the supporting wheels, so that when said wheel frame pivots about said axis said wheels move rearwardly and said axis moves downwardly substantialy an equal amount, whereby the weight of the operator aids in lifting the rigs, means to adjust the position ofsaid rigs on said wheel frame, and means to swing the wheel frame about its pivotal axis. 7

16, In a cultivator, the combination ofa pair of side wheels, a wheel frame mounted thereon, a seat frame pivotally connected with said wheel frame to turn about a transverse pivot axisdisposed forwardly of the wheel centers, a pole pivotallyconnected with said seat frame on a transverse pivot axis disposed forwardly of said first named pivot axis, a lifting lever operatively connected to effect angular folding movement between said frames and said first named pivot axis, means to angularly adjust the pole relative to the seat frame, said means including a levelling lever connecting the pole to the wheel frame at a point substantialy in the first named pivot axis, so that the seat frame and the pole move substantiallyas a unit during said pivotal folding movement between the frames, cultivator rigs carried on said wheel frame, and means actuated by operation of said lifting lever for'swinging said cultivator rigs vertically relatively to said wheel frame.

17. A cultivator having a pole and seat frame unit, a wheel frame unit provided with supporting wheels, and means to pivot the wheel frame unit about an axis on the pole and seat frame unit in such a manner that the pole and seat frame unit is adapted to move downwardly as the supporting wheels move rearwardly, and substantially the same amount. 7

18. Ina cultivator, the combination of a wheel frame unit mounted on side wheels, a pole and seat frame unit pivotally connected with the wheel frame for relative folding movement about a transverse axis disposed forwardly of the axis of'said side wheels, means for angularly adjusting said pole and seat frame unit relatively to said wheel frame unit, and cultivator rigs mounted on one of i said units. a

19. In a cultivator,'the combination of a pole and seat frame unit, a wheel frame unit having a downwardly extending portion'and a forwardly'extending portion, supporting wheels carried by'the downwardly extending portion, a pair of spaced transverse bars connecting the forwardly extending portion of the wheel frame to the poleand seat frame unit for pivotal movement about a transverse axis, rearwardly extending cultivator rigs carried by said wheel frame, and means to pivot the wheel frame and cultivator rigs about the pivotal axis of the former, whereby when the rigs are lifted the supporting wheels are moved rearwardly to balance the rigs and the seat frame is lowered so that the weight of the operator aids in lifting-the rigs.

I 20. In a cultivator, the combination of a poleand seat frame unit, a wheel frame unit having a downwardly extendingportion and a forwardly extending portion, supporting wheels carried by the downwardly extending portion, means connecting the forwardly extending portion of the wheel frame to the polev and seat frame unit for pivotal movement about a transverse axis, rearwardlyextending cultivator rigs carried by said wheel frame, and means to pivot the wheel frame and cultivator rigs about the pivotal axis of the former, said second named portion of the wheel frame unit extending forwardly farther than the first portion extends downwardly, whereby when the rigs are lifted the supporting wheels are moved rearwardly to balance the rigs and the seat frame is lowered so that the weight of the operator aids in. lifting the Egg V e serving to 21. In a cultivator, the combination of a pole and seat frame unit, a wheel frame unit having a downwardly extending portion and a forwardly extending portion, supporting wheels carried by the downwardly extending portion for steering movement about vertical axes, means including a pair of spaced transverse bars embracing said seat frame and pivotally connect the forwardly extending portion of the wheel frame to the pole and seat frame unit for pivotal movement about a transverse axis, rearwardly extending cultivator rigs carried by said wheel frame, means movably connected with said transversed bars for swinging said wheels about their axes, and means to pivot the wheel frame and cultivator rigs about the pivotal axis of the former, whereby when the rigs are lifted the supporting wheels are moved rearwardly to balance the rigs and the seat frame is lowered so that the weight ofthe operator aids in lifting the-rigs.

22. A cultivator comprising a pole and seat frame unit comprising a. pair'of spaced bars, a wheel frame unit having a pair of bars arranged on either side of said first bars and extending transversely thereof and supporting wheels the axis of which is disposed rearwardly and below said transverse bars, said wheels being arranged for steering movement about vertical axes and provided with forwardly extending arms, means carried by said transverse bars for connecting said arms 7 together, cultivator rigs connected with said last named means, said pair of transverse bars acting as pivoting means to pivotally con nect said wheel frame with the spaced bars of the pole and'seat frame unit for vertical swinging movement, and means for simultaneously swinging said wheel frame about its pivotal axis on the seat frame unit and raising and lowering said rigs, whereby when the rigs are lifted the supporting wheels are moved rearwardly to bala-nce'the rigs and the seat frame is lowered so thatthe weight of the operator aids in lifting the rigs.

In witness whereof, I hereunto subscribe my hand this 2d day of August, 1928.

CARL G. STRANDLUND;