referring to fig1 , there is shown a right side elevation view of the overall rotary applicator unit for spreading dry fertilizer or livestock waste in the form of a slurry . reference number 1 generally designates a spring reset mechanism for a single row unit of a slurry applicator . as is known , a number of such applicator units are mounted on a wagon with a tool bar 27 drawn by a tractor ( not shown ). the applicator units are mounted in side - by - side relation and in a spaced manner . the tool bar 27 , or frame , may have its own support wheels , or may be mounted to a wagon carrying the slurry . in any case , tool bar 27 trails a slurry wagon , or container , ( also not shown for convenience ) for a large amount of slurry fertilizer which is to be applied to a field . a coiled spring 73 is compressed ( i . e . preloaded ) and pivotally connected to a main shank 5 by bolt 55 . when a rock or other obstruction is encountered by the rear conical coulter blade 21 , the main shank 5 , the rear conical coulter blade 21 , and slurry tube 52 are pivoted upwardly away from the obstruction . as the coiled spring 73 is compressed , bolt 55 telescopes and pivots at mounting bolt 75 out of a trunion 2 . main shank 5 pivots at pin 7 . opening 70 allows a front shank bolt 28 to be inserted in a shank clamp weldment 29 . shank clamp weldment 29 pivots about pivot pin 7 . the spring cushion / reset mechanism 1 is mounted to a conventional toolbar 27 by mounting plates 56 and a mounting bracket 3 that pivots on a bolt 57 . with an upper bolt 4 inserted through mounting bracket 3 , mounting plates are tightly clamped against the toolbar 27 located between bracket 3 and the mount plates . at the forward portion of the mounting assembly , steel plates are formed inward . at the forward portion of the plates 58 is a cross piece of steel 10 . a similar piece of steel is welded behind a front coulter mount bar 12 . this provides a rectangular sleeve of receptacle so that the coulter mount bar 12 can be telescoped vertically within the sleeve and pinned ( see pins 11 ) to adjust a front coulter 20 to the desired operating depth . additional holes 59 are provided in coulter mount bar 12 to allow the front coulter 20 to be positioned at the same depth or shallower than the rear coulter 21 . on a lower forward portion of coulter mount bar 12 a vertical shaft 13 is welded and the forward portion of a spring - cushioned assembly 16 is provided with a sleeve 14 telescopically coupled to vertical shaft 13 . a front coulter assembly 89 including front coulter blade 20 is similar to assemblies used on various agricultural tillage tools . rear coulter assembly 85 and closer assembly 90 are bolted to a main shank 5 by means of a u - bolt and nuts 22 at the forward portion . another bolt 23 attaches the rear portion of main shank 5 to an intermediate portion of the rear coulter assembly 85 . bolts 47 attach rear coulter mount bar 18 to the rear coulter assembly 85 . a pair of coulter hub support arms 78 are coupled to rear coulter mounting bar 18 and support the rear coulter hub 17 . additional holes 25 in rear coulter mounting bar 18 provide an independent depth setting for units operating in tire tracks in wet conditions . additional holes 59 in front coulter mount bar 12 allow the front coulter 20 to also be independently lowered in the tire tracks . pin 13 and sleeve 14 also allow swivel of the front coulter 20 about a generally vertical axis . also , rear coulter mount bar 18 may be shimmed between rear coulter 21 and the path of a closer mount plate 19 to change variation of the path of the front coulter 20 through the soil ( vertically or left to right ) versus the path of the rear coulter 21 through the soil . a bar 51 supports a short pipe 52 which extends behind rear coulter blade 21 . to facilitate delivery in the slots created by the coulters 20 and 21 , a clip 53 provides support to clamp a slurry delivery hose behind rear coulter blade 21 . a pair of furrow closing blades 30 are laterally spaced approximately 12 ″ apart and operate at acute angles relative to the direction of travel thereby forming a berm of loose soil on the top of the slots formed by the front and rear coulter blades 20 and 21 . some liquid fertilizer soaks into the surface soil . the purpose of the furrow closing blades 30 is to cover this area to reduce odor and prevent liquid from flowing down slope on steep hills . to allow the furrow closing blades 30 to follow the soil contour , pin 34 allows frame weldment 45 to pivot vertically . cross plate 43 limits movement when the frame weldment 45 contacts cross plate 43 . formed cross plate 43 has a slotted hole therein to allow for angular adjustment of the furrow closing blade 30 relative to the direction of travel similar to conventional closers . a hub 31 is welded to support arms 32 . a coiled spring 35 is disposed about and extends the length of bolt 38 . a nut 37 disposed on bolt 38 limits downward movement of furrow closer assemblies 90 and furrow closing blades 30 . castings 36 are positioned on each end of spring 35 to fit the spring coil . a pivot bolt 39 is attached to a tab 60 that is welded to pin 40 . pin 40 telescopes through sleeve 41 . pin 40 has multiple holes and spring 35 compression can be changed by removing pin 42 and telescoping pin 40 forward or rearward through sleeve 41 to change the downward force exerted on furrow closing blades 30 . removal of the front shank bolt 28 and loosening bolts 71 respectively in mounting plates 56 and shank clamp weldment 29 allows the rear coulter assembly 85 , a furrow closer assembly plate weldment 88 and main shank 5 to be removed as one ( 1 ) single assembly and be replaced with a formed shank and sweep to convert to sweep incorporation . referring to fig2 , there is shown a side elevation view of a wavy conical shaped coulter blade 20 with a flat center portion 80 contemplated for use in the present invention . waves with crests 82 and valleys 83 are formed from a flat center to an outer periphery of the conical shaped coulter blade 20 . a center hole 81 within the wavy conical coulter blade 20 is sized to fit over the blade &# 39 ; s inner hub 17 for mounting the coulter blade 20 to the hub . for this purpose , there are provided four ( 4 ) bolt holes 84 as shown in fig1 . referring to fig3 , there is shown an edge - on view of the conical wavy coulter blade 20 . as the leading edge of the conical shaped blade enters the soil , the coulter blade 20 swivels on sleeve 14 as shown in fig1 . the conical shape of coulter blade 20 is shown in its curvature 86 . as the blade 20 rotates forward , its conical shape 86 enters the soil along the line of travel and soil is lifted and moved laterally providing a slot for the liquid fertilizer to flow down into . as any excess water in the slurry infiltrates the soil below the slot , the solids are buried at the bottom . this prevents high surface soil fertility . fig4 and 5 illustrate additional embodiments of the invention respectively including pivotally mounted swiveling single blade and a non - pivoting , fixed single blade . fig5 illustrates yet another embodiment of the present invention including the combination of a single blade and a shank and sweep arrangement with a delivery tube . elements shown in fig4 , 5 and 6 which are also illustrated in fig1 , 2 and 3 and discussed above are provided with the same element members throughout all of the figures . referring to fig4 , depicts the single blade system . the rear blade is removed and a curved shank 105 is installed behind the front coulter blade 20 . bracket 151 is bolted to the aft , lower end of shank 105 and supports a short pipe 152 behind coulter 20 . a clip 153 provides a support to clamp a slurry delivery hose 154 to pipe 152 aft of coulter 20 . a pair of blades 30 are spaced approximately 12 ″ apart and operate at an acute angle to the direction of travel thereby building a berm of loose soil on the top of the slot created by the coulter 20 . some liquid soaks into the surface soil . the purpose of the blades is to cover this area to reduce odor and prevent liquid from moving on steep hills . formed cross plate 46 has slotted holes to allow blade 30 angle adjustment similar to conventional closers . additional holes 59 in front coulter mount bar 12 allow the front coulter 20 to also be independently lowered to provide the same depth in the tire tracks where the surface of the soil is appreciably lower . this can occur in wet conditions because the tank tires will cut a slight rut . with reference to blade 30 , a single closing blade could be employed to move soil opposite the lateral direction of the soil moved by the conical wavy blade 20 . however , it would reduce the amount of soil covering the furrow especially in adverse soil conditions as compared to the use of a pair of covering blades . a hub 31 is welded to support arms 32 . a spring 35 sleeves over bolt 38 . a nut 37 on bolt 38 telescopes inside spring 35 . a pivot bolt 39 attaches to mount 160 and clamps to shank 105 in an arrangement which applies a downward force on furrow closing blade 30 . referring to fig5 , is shown a right side elevation of another embodiment of a rotary applicator for depositing the slurry fertilizer with a single conical blade 20 in accordance with the present invention incorporating a rigid , non - swivel mount . the hub , or spindle , 17 is fixed to arm 78 . the portion of the conical blade 20 ahead of the spindle 17 enters the soil in line of travel direction and the rear portion moves soil laterally to provide a furrow . the disadvantage to the non - swivel assembly is that any time the tank unit is not going straight in line , the massive side forces are created and causes stress to the tank mount and the coulter assembly . the fixed mount is not a problem when attached to a tool bar that is pulled behind a farm tractor drawbar . referring to fig6 , removal of the front shank bolt 70 and loosening bolts 71 allows the rear coulter assembly 99 and closer assembly 85 and plate weldment 88 and shank 5 to be removed as one ( 1 ) single assembly and be replaced with a formed shank 105 and sweep 106 with delivery tube 107 to convert to sweep incorporation as depicted in u . s . pat . no . 6 , 973 , 884 . sweep 106 includes a pair of wings extending outwardly and substantially horizontally in opposite directions , where one of the wings is shown as element 110 in fig6 . these outwardly extending wings 110 form left and right lateral extensions of a lower portion of the furrow . this applicator is not limited to livestock waste . a single blade unit would be ideal for applying liquid or dry commercial fertilizer . while particular embodiments of the present invention have been shown and described , it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects . therefore , the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention . the matter set forth in the foregoing description and accompanying drawings is offered by way of illustration only and not as a limitation . the actual scope of the invention is intended to be defined in the claims when viewed in their proper perspective based on the prior art .
an applicator for applying dry fertilizer or livestock waste in the form of a slurry beneath the soil surface with minimum soil displacement includes a leading spring - cushioned , conical - shaped , wavy coulter angularly offset from the direction of travel which displaces soil laterally in forming a furrow adapted to receive fertilizer . the coulter is trailed by a single , or a pair of , rotary blade which fill the furrow , covering the deposited fertilizer . a second embodiment includes a second wavy coulter disposed between the leading coulter and the trailing rotary blades for directing soil in a laterally opposed direction from the soil displaced by the leading coulter in forming a wider furrow . the single conical coulter and dual conical coulter embodiments are easily interchangeable in the applicator , and are easily removed and replaced with a curved shank and sweep assembly to convert to sweep fertilizer application .