US2537404A - Brush chopping machine - Google Patents

Description

D. R. GARRETsoN 2,537,404

BRUSH CHOPPING MACHINE Jan. 9, 1951 Filed Deo. 1, 1945 6 Sheets-Sheet l D. R. GARRETSON BRUSH CHOPPING MACHINE Jan. 9, 1951 6 Sheets-Sheet 2 Filed DeG. 1, 1945 {NI/ENTOR. BYO ws P. @mea-754W W f m Qatar/M95 Jam 9, 1951 D. R. GARRETSON 2,537,404

BRUSH cHoPPING MACHINE y Filed Dec. l, 1945 6 Sheets-Sheet 5 IN V EN TOR.

A W5 P. @maarja/v BY Jan. 9, 1951 D. R. GARRETsoN 2,537,404

BRUSH cHoPPING MACHINE Filed Dec. l. 1945 6 Shecs-Shee'fI 4 IN V EN TOR.

Jan' 9, 1951 D. R. GARRETSON 2,537,404

BRUSH CHOPPING MACHINE Filed Deo. l, 1945 6 Sheets-Sheet 5 IN VEN TOR. /u//j @Leef 15a/v Jan. 9, 1951 D. R. GARRETSON 2,537,404

BRUSH CHOPPING MACHINE Filed Dec. l, 1945 v6 Sheets-Sheet 6 Patented Jan. 9, 1951 UNITED STATES PATENT OEFICE 18 Claims.

This invention relates to a brush handling machine orbrush hog.

A primary object of the invention is to provide a machine in the form of a movable vehicle which has a collared ribbon hogging cylinder or hogging means, and which has power-driven means for picking up or dragging brush and the like and feeding it to the hogging means so as to be cut up into relatively small pieces. e

The invention has been primarily devised for handling prunings in citrus groves, and consequently will be described as used therein although it may be employed wherever it is desired to cut up or finely divide brush or other vegetable matter.

In citrus groves, particularly lemon groves, the trees are periodically pruned and the prunings which may be `relatively heavy branches have heretofore been dried and ultimately burned as a means of disposing of them. The present invention provides a machine for cutting up such prunings into small fragments and redepositing these fragments on the soil between the trees. This covering layer which is woody in nature provides an excellent mulch when allowed to remain on the surface and if disced under it will shortly rot and contribute humus to the soil. In accordance with the present invention it is proposed to deposit the prunings from the citrus trees in windrows between the rows of trees and thereafter to run the machine down the windrows, pick up the brush, and grind it or cut it into relatively small fragments which are redeposited on the ground.

More specifically, an object of the invention is to provide a brush handling machine consisting of a vehicle on which a hogging means is provided and to provide a novel means for picking up the brush and feeding it to the hogging means. Inasmuch as the prunings or branches are f every conceivable irregular shape, the feeding means must be so designed as to pick up the brush regardless of the limb shapes urge the brush into engagement with the hogging means.

With the foregoing and other objects in view, which will be made manifest in the following detailed description and specifically pointed out in the appended claims, reference is had to the accompanying drawings for an illustrative embodiment of the invention, wherein:

Figure 1 is a perspective view of the front of the machine embodying the present invention;

Fig. 2 is a view in side elevation of the same;

Fig. 3 is a perspective view of the machine illustrated in Fig. 1, but taken from a different point of view;

Fig. 4 is a vertical section through the apron forming a part of the machine and taken substantially upon the line 4--4 upon Fig. 3;

Fig. 5 is a View partly in elevation and partly in section, the sectional part thereof being taken substantially upon the line 5-5 upon Fig. 4;

Fig. 6 is a view taken substantially upon the line 6 6 upon Fig. 4; ,A

Fig. 7 is a view in elevation of the hogging cylinder forming a part of the machine embodying the present invention;

Fig. 8 is a longitudinal vertical section through the machine but illustrating only one of the pivoted arms thereof which carries large feeding teeth and illustrating the various positions it assumes in dotted lines; 4

Fig. 9 is a partial view in side elevation illustrating the details of construction of one of the arms;

Fig. 10 is a sectional view taken substantially upon the line lli- I0 upon Fig. 8;

Fig. 11 is an enlarged view in vertical section illustrating the lower portion of the hogging cylinder and associated structure and may be regarded as having been taken substantially upon the line lI-Il upon Fig. '7;

Fig. 12 is a top plan view of the transmission and associated structure forming a part of the machine; and

Fig. 13 is a view taken substantially upon the line I3'-l3 upon Fig. 12.

Referring to the accompanying drawings wherein similar reference characters designate similar parts throughout, the machine embodying the present invention is carried on a suitable vehicle, such as for example a truck, the chassis of which is indicated at l0 and having rear wheels Illa. The truck may be of any preferred or conventional construction and in the course of operation of the machine it is intended to be driven in reverse between rows of trees in following a windrow of brush or prunings deposited therebetween. As these windrows are usually formed between straight rows of trees the windrows themselves will normally be relatively straight so that there is little occasion to steer the truck in following the straight windrow although steering by the front wheels (not shown). of the truck is of course possible. The truck may be advantageously used to transport the entire machine from place to place in the conventional manner and as the progress of the machine in following the windrow of brush is relatively slow the low gearing of the normal reverse gear in a truck transmission is not objectionable.

. On the chassis l0 there is provided a suitable 3 source of power such as an internal combustion engine indicated at l5. On the drive shaft of the internal combustion engine there are a series of pulleys I2 for V belts or the equivalent indicated at I3 that provide a direct drive between the internal combustion engine H and the lumber hogging cylinder I4. This hogging cylinder is mountedv on a suitable axle I5 on which there are pulleys t6 over which the belts l3 are.l trained, a belt tightener being indicated at l1 for keeping these belts suitably tight.

The hogging cylinder extends a substantial distance across the width of the chassis of theI truck and is relatively heavy. I nd it suitable for my purposes to employ a hogging cylinder weighing approximately 250G lbs. and` rotated at aspeed: ofl approximately 775 R; P. M. On the hogging cylinder at spaced intervals there are pockets within which knives or blades i8 are adjustably secured by means of cap screws I9 and blade `platesY 2l). These blades project beyond the cylindrical surface of the body of the cylinder a short distance, see Fig. ll, depending on the degree of fi'eness to which it is desired to cut up the brush. During the rotation of the hogging cylinder` the blades i8 sweep adjacent the stationary blade 2| that is adjustable by means of cap screws 22 and in'- the preferred form of construction there is a Y second stationary blade 23 that is likewise adjustable. These blades' extend transversely of the truck the entire length of the hogging cylinder and the brush to be cut up is fed in a direction between the rotating cylinder and the stationary blade 2l across the apron that is generally designated at 24. On the opposite end of the hogging cylinder from pulleys i6 there are additional pulleys 25 which are part of a belt transmission 26 to a transversely extending shaft 2l. On this shaft there is a clutch 28, see Fig. 12, operable by linkage 29 and a speed-change transmission 36 which delivers power taken off of the hugging cylinder at variable speeds to a shaft 3| having a gear 32 that meshes with a gear 33 on a stub shaft that carries a chain sprocket 34. A chain 35 is trained over this sprocket and over a spr`ock et 36 on a stub shaft 31 and on this stub shaft there is a second sprocket over which is trained a chain 38 that leads downwardly to a sprocket 39 which is on the end of a shaft 49 extending across the rear or inner end of the apron 241. On this shaft 4t) there is mounted a corrugated roller 4l that is located rather close to the sta-e tionary blade of the hugging means, see Fig. 11. This corrugated roller is driven in such a Inan-V ner as to urge material brought in over the apron toward the stationary blade 2l and into the path of the blades I8 on the hugging cylinder. On the opposite end of shaft 4G from sprocket 39 there is a sprocket over which is trained a chain 42 so as to provide a driving connection between the co1 rugated cylinder 4I and a rotary cylinder 43 that is rotatably mounted at the forward end of the apron. Within the rotary cylinder 43 there is a rotary shaft 44 that is mounted for rotation about an axis that is eccentric with respect to the axis of rotation of the cylinder 43, and this shaft carries a series of radially extending teeth 45 that extend through slots 46 in the cylinder; The arrangement of the shat with respect to the cylinder 43 is such that when the teeth on the shaft 44 are lowermost and in a position similar to that illustrated in Fig. 4, that the teeth project considerably through the slots 43 in the cylinder. During rotation of the cylinder and shaftthe teeth are retracted as indicated by dotted lines on Fig. 4, so that in eiect these teeth project from the cylinder on its underside but on its upper side they are retracted therein. These teeth are driven in the direction of the arrow as illustrated on Fig. 4, and tend to pick up brush and twigs lying on the ground and deposit them on the apron 24. inasmuch as these teeth sweep very closely to the ground the extending and retractlng action of the teeth with relation to the cylinder is highly advantageous in that each retraction of the teeth through the slots 46 tends to clean them and at the same time they are caused to be withdrawn and to disengage and thus release the brush deposited on the apron. The apron is adjustable with respect to the ground by means of hangers 46 that are pivotally connected thereto and to cranks 4l that are pivotally mounted on the frame 43. The cranks 41 are, in turn, connected by linkages 49 to an adjustable lever 5t that traverses a quadrant 5l. By adjusting lever 59 with relation to the quadrant the apron may be adjusted about the axis of shaft 4o as acenter. Tension springs 52 may be secured to the frame 48 and to the tops of the hangers 46 to assist in carrying the load of the apron in any adjusted position. At the sides of the apron there are mounted wings 53 which converge rearwardly or toward the hogging cylinder and tend to guide the brush as it is drawn across the apron toward the center of the apron andv in a position to be engaged by hogging cylinder.

On the shaft 3i there is provided a sprocket 54 over which is trained an endless chain 55. This chain in turn drives a sprocket 56 on a shaft 51 extending across the chassis of the vehicle and which has cranks 5S at the ends. Pitmans '59 are pivotally connected to these cranks and have their lower ends slidably extending through pivoted collars Gil on crank arms Si' o-n a transversely extending shaft 52. This shaft, in turn, has pairs of crank arms 63 rigidly secured thereto whichl extendA downwardly against opposite sides of tampers or packers G4 and are pivotally secured thereto as at 65 adjacent their rear ends. The forward ends of these packers or tampers are pivotally suspended by means of links 66 from arms 61 on the frame. The packers or tampers are inthe form of steel plate sections that extend downwardly and rearwardly and which present downwardly and rearwardly inclined teeth`- 58. At their extremities they are provided with extensions 69 that press the brush rather closely against the hugging cylinder. Compression springs 10 surround the pitmans and are compressed between pins 1l and the collars 66, thus forming a yieldable connection between the cranks 58 and the cranks 6i.

During rotation oi the shaft 3l siaft 51 will be driven at a reduced speed and the cranks 8 will in turn operate the pitinans t causing the shaft 62 to be oscillated. The cranks 63 will causel the packers or tampers to bel reciprocated in a somewhat oscillatory manner and cause the teeth 68 and extensions ed to engage the brush and advance it toward the hogging cylinder with a step-by-step motion. The packers or tampers that thus advance the brush toward the hugging cylinder operate in unison and serve to crowd the brush downwardly against the apron and into engagement with the corrugated roll lli and to cooperate therewith in feeding the brush against the hogging cylinder.

The shaft 5l carries a small sprocket i3 and an endless chain 14 provides a driving connection between this shaft and a sprocket 'l5 mounted on a crankshaft 16. This crankshaft preferably has four throws, that is its crank pins are circumferentially spaced 90 apart. The crankshaft is suitably mounted for rotation on bearings 11 on arms secured to the frame. On the crank pins there are provided bearings 18 that are secured to the undersides of arms 19. Each arm is preferably made up of two spaced plates between the outer ends of which there are rigidly secured long downwardly extending teeth 80. Somewhat rearwardly of these teeth there are pivotally secured additional teeth 8| the pivots therefor being provided at 82. Tension springs 83 are secured to the upper ends of these teeth and connect them with the outer or forward ends of the arms on which they are mounted. These tension springs urge the teeth 8| into the fullline position shown in Fig. 9, against stops 84. However, if the brush accumulates excessively behind the teeth 8| these teeth may swing into the dotted line position as shown in Fig. 9. It

is ordinarily not necessary to make the teeth 80 yieldable due to the fact that these teeth are so remote from the hogging cylinder. However, as the brush is drawn toward the hogging cylinder it is advisable to have the teeth 8| yieldable and the packers or tampers yieldable as is provided by the springs so that these teeth and packers may give when the brush crowds too heavily against the hogging cylinder. The rear ends of the arms 19 are provided with spacers 85 through which extend bolts 86 on which are mounted rollers 81, these rollers being retained on the bolts by Washers 818 and nuts 89. Guides or cams 90 are rigidly secured to the frame and have slots 9| formed therein in which the rollers 81 are disposed. These guides or cams serve to guide the motions of the rearward ends `of the arms 19 while the arms are being actuated with the rotary crankshaft 16. It will be noted that these slots 9| are curved as illustrated so as to bring about a rather peculiar motion of the arms 19 and the teeth 80 and 8| thereon. In other words, as the crankshaft rotates each arm will be caused to be lifted by its crank pin on the crankshaft, then carried upwardly and forwardly and during this forward motion the rollers 81 merely roll down the inclined forwardmost portions of the slots 9|. As the crank pin continues its rotation the -arms are lowered in this extended position causing the teeth 8D and 8| to descend into the brush of the windrow. During the forward motion of the crank pin the teeth are brought forwardly to pass the brush onto the apron and to deliver it into a position to be picked up and advanced by the tampers or packers. The curvature of the slots 9| guide the motion of the rear ends of the arms sov that as the arms are lifted by the crankshaft they will be withdrawn clear of the delivered brush. As the crank pins on the crankshaft are circumferentially spaced, the arms may be regarded as operating in sequence. In other words, while one pair of teeth 80 and 8| on one arm is descending into the brush of the windrow, another arm and its teeth may be drawing brush rearwardly onto the apron. A third arm and its teeth may be simultaneously lifted from the delivered brush and a fourth arm and its teeth may be undergoing the operation of being extended forwardly to pick up a new load. In this manner, brush is being constantly picked up and drawn rearwardly by the teeth 80 and 8| on the various arms Vand drawn onto the apron where its rearward movement is picked up and advanced by the packers or tampers 64, and the corrugated roller 4|. At the same time brush lying close to the ground is being picked up by the continuously rotating teeth 45 and lifted onto the apron. `The elevation of these teeth with respect to the ground surface can at all times be adjusted by means of the lever 5|). The relative speeds of the various shafts is such that the teeth 45 rotate fairly rapidly and the packers and tampers 5d are reciprocated fairly rapidly. There is a considerable speed reduction between the shaft 3| and the crankshaft 1S so that the teeth and 8| move through their cycles of movement rather slowly in picking up and dragging the brush onto the apron, As the brush is brought in contact with the hogging cylinder the vcuttings in the form of chips or slivers are dis-' charged rearwardly underneath the vehicle and will normally be scattered thereby over the surface of the ground. If allowed to remain on the surface they form a moisture-retaining mulch and if disced or plowed under, these chips and cuttings as well as the leaves quickly rot and` contribute humus to the soil. Y

In the course of operation of the machine I find it advantageous to disengage the clutch 28 and to hold the same disengaged until the heavy hogging cylinder has been brought up to speed so that a heavy starting load is not placed on the internal combustion engine After the hogging cylinder has been brought up to speed it functions not only as a hogging cylinder but fas a heavy flywheel at the time that the 'clutch is engaged to start the various mechanism driven olf of shaft 3|. The speed of operation of the various elements of the machine that contribute to feeding the brush to the hogging cylinder may be Varied by the speed-change transmission 3|) in accordance with how heavy the brush may be in the windrow. Y

While it is preferable to arrange the brush or prunings in a windrow in an orchard or grove lt will readily be appreciated that the present machine may be utilized with Vbrush in other conditions. It may be employed where the brush is merely scattered or where brush is piled in a single large pile or a plurality of scattered piles; When the brush is arranged in a windrow the vehicle can ordinarily be moved continuously and slowly down the length of the windrow and the chips or cuttings evenly scattered as the vehicle proceeds.

Various changes may be made in the details of construction without departing from the spirit and scope of the invention as dened by the ap# pended claims.

I claim:

1. A device of the class described comprising a vehicle having a hogging cylinder rotatably mounted thereon, a stationary blade adjacent the cylinder, means for rotating the cylinder, an apron adjacent the stationary blade, means for drawing brush and the like onto the apron so as to be hogged by the hogging cylinder including arms having downwardly extending teeth thereon, at least some of the teeth being pivoted to the arms and movable from an outer to an inner position, means urging the pivoted teeth into their inward position, and means for causing said arms to be lifted, extended outwardly beyond the apron, lowered, and then be drawn inwardly over the apron.

2. A device of the class described comprising a vehicle having a hogging cylinder rotatably mounted thereon, a stationary blade adjacent the bottom of the cylinder, means for rotating the cylinden, an apron adjacent the stationary blade, means for drawing brush and the like onto the apron so as to be hogged by the hogging cylinder. including arms having downwardly extending teeth thereon, a crankshaft on the vehicle on which the arms are pivotally mounted, means for rotating the crankshaft, and guide means on the vehicle for the inner ends of the arms constraining the arms to move in a predetermined path of travel irrespective of the upward force on. the arms whereby the arms on rotation of the crankshaft will bev lifted, extended outwardly from the hogging cylinder, lowered, and drawninward- 1y toward the hogging cylinder.

3. A device of the class described comprising a vehicle, hogging means thereon, a crankshaft on the vehicle having a plurality of throws, arms pivotally mounted thereon adjacent their outer ends, guide means on the vehicle for the inner ends of the arms, means for rotating the crankshaft, and downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward the hugging means.

4. A device of the class described comprising a vehicle, hugging means thereon, a crankshaft on the vehicle having a plurality of throws, arms pivotally mounted thereon adjacent their outer ends, guide means for the inner ends of the arms, means for rotating the crankshaft, and downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward the hogging means, andan apron extending forwardly from the hogging means over which the teeth are drawn.

5. A device of the classr described comprising a vehicle, hogging means thereon, a crankshaft on the vehicle, arms pivotally mounted thereon adjacent their outer ends, guiding means on the vehicle, means on the inner ends of the arms guided by the guiding means, means for rotating the crankshaft, and downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward. the hogging means, an` apron extending forward-ly from the hogging means over which' the teeth are drawn, and means for adjusting the inclination of the apron.`

6.` A device. of the class described comprising a vehicle, hogging means thereon, a crankshaft on the vehicle, arms pivotally mounted thereon, guide means on the vehicle for the inner ends of the arms, means for rotating the crankshaft, and downwardly extending teeth on the outer. ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward the hogging means, an apron extending forwardly from the hogging means over which the teeth are drawn, said apron having a corrugated cylinder adjacent the hogging means positioned so that the longitudinal axis of the cylinder is below the top surface of the apron, and means for rotating said corrugated cylinder in a direction to cooperate with the teeth in feeding material to the hogging means.

'7. A device of the class described comprising a vehicle, hogging means thereon, a crankshaft on the vehicle, arms pivotally mounted thereon, guide means on the vehicle for the inner ends of the arms, means for rotating the crankshaft, and downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward the Vhogging means, an apron extending forward.- ly from the: hoggl'llg means over which the teeth aredrawn, said apron having at the outer end thereof a rotary cylinder, and teeth rotatable within and with said cylinder about an axis eccentric thereto so that the teeth will be drawn into the cylinder when disposed uppermost and project therefrom when disposed lowermost, and means for rotating said cylinder and teeth in a direction to cooperate with the mst-mentioned teeth in feeding material across the apron to the hogging means.

8. A device of the class described comprising a vehicle, hogging means thereon, a crankshaft on the vehice, arms pivotally mounted thereon, guide means on the vehicle for the inner ends of the arms, means for rotating the crankshaft, and downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward the hogging means, and packers mounted for oscillation between the teeth and adjacent said hogging means, and means for oscillating said packers to cause them to pick up material brought toward the hogging means by said teeth. and pack toward the hogging means.

9*. A device of the class described comprising a vehicle, hogging means thereon, a crankshaft on the vehicle, arms pivotally mounted thereon, guide means for the inner ends of the arms,

ieans for rotating the crankshaft', and downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward the hogging means,r and packers mounted for oscillation between the teeth and adjacent said hogging means, and means for oscillating said packers to cause them to pick up material brought toward the hogging means by said teeth and pack it toward the begging means, said last named means being yieldable.

10. A device of the class described comprising a vehicle having a hogging cylinder, means for rotating the hogging cylinder, an apron adjacent the. hugging cylinder, a stationary blade adjacent which the hogging cylinder rotates, a corrugated roller on the apron adjacent the sta.- tionary blade, rotary means at the outer end of the apron for beating material onto the apron, means for rotating said corrugated cylinder, and said rotary means, arms carrying teeth above the apron, means for lifting said arms, extending them, lowering them, and drawing them inwardly toward thel apron, and packers arranged above the apron, and means for reciprocating said packers.

11. In a brush hog or the like, hogging means, and means for feeding brush and the like toward the hogging means including a crankshaft hav'- ing a plurality of throws, arms pivotally mounted on the crankshaft, teeth on the outer ends of said arms, means for guiding the inner ends of said arms, means for rotating the crankshaft, at least some of the teeth being pivoted to the arms and movable from an outer to an inner position, and means for urging the pivoted teeth into their inward position.

12. In a brush log or the like, a vehicle, a hogging cylinder mounted for rotation thereon, a stationary blade adjacent the hugging cylinder, means for rotating the hogging cylinder, a plurality of packers adjacent the hogging cylinder, links suspending the outer ends of the packers, a rockshaft adjacent the inner ends of the pack- Z5 ers, means connecting the inner ends of the pack- 9 ers to the rockshaft, and means for oscillating the rockshaft.

13. In a brush hog or the like, a, vehicle, a hoggingcylinder mounted for rotation thereon, a stationary blade adjacent the hogging cylinder, means for rotating the hogging cylinder, a plurality of packers adjacent the hogging cylinder, links suspending the outer ends of the packers, a rockshaft adjacent the inner ends of the packers, means connecting the inner ends of the packers to the rockshaft, and means for oscillating the rockshaft, said packers having teeth directed toward the hogging cylinder on the lower edges thereof.

14. A device of the class described comprising a vehicle having a hogging cylinder rotatably mounted thereon, a stationary blade adjacent the cylinder, means for rotating the cylinder, an apron adjacent the stationary blade, means for drawing brush and the like onto the apron so as to be hogged by the hogging cylinder including arms having downwardly extending teeth thereon, a crankshaft on which the arms are pivotally mounted, means for rotating the crankshaft, and guide means for the inne1` ends of the arms, particular portion-s of the ends of said arms being constrained to ride continuously within the guide means whereby on rotation of the crankshaft the teeth will be lifted, extended outwardly from the hogging cylinder, lowered, and drawn inwardly toward the hogging cylinder.

15. A device of the class described comprising a vehicle, hogging means thereon, a crankshaft on the vehicle having a plurality of throws, arms pivotally mounted thereon adjacent their outer ends, guide means on the vehicle for the inner ends of the arms, means for rotating the crankshaft, downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly toward the hogging means, at least some of the teeth being pivoted to the arms and movable from an outer to an inner position, and means urging the pivoted teeth into their inward position.

16. A device of the class described comprising a vehicle, hogging means thereon, a crankshaft on the vehicle having a plurality of throws, arms pivotally mounted thereon adjacent their outer ends, guide means on the vehicle for the inner ends of the arms, means for rotating the crankshaft, and downwardly extending teeth on the outer ends of the arms adapted to be lifted thereby, extended, lowered, and drawn inwardly mounted thereon, a stationary blade adjacent the bottom of the cylinder, means for rotating the cylinder, an apron adjacent the stationary blade, means for drawing brush and the like onto the apron so as to be hogged by the hogging cylinder, including arms, a crankshaft on which the arms are pivotally mounted, means for rotating the crankshaft, downwardly extending teeth on the arms, at least some of the teeth being pivoted to the arms and movable from an outer to an inner position, means urging the pivoted teeth into their inner position, and guide means for the inner ends of the arms constraining the arms to move in a predetermined path of travel irtoward the hogging means, at least some of the respective of upward forces on the arms whereby the teeth on rotation of the crankshaft will be lifted, extended outwardly from the hogging cylinder, lowered and drawn inwardly toward the hogging cylinder. Y 18. A device of the class described comprising a vehicle, cutters for cutting brush or the like, a crankshaft rotatably mounted on the vehicle, arms pivotally mounted on the crankshaft adjacent their outer ends, guides on the vehicle operatively connected to the inne` ends of the arms for guiding the inner ends of the arms, downwardly extending teeth on the outer ends of the arms, a motor operatively connected to the cutters and the crankshaft for operating the cutters and for rotating the crankshaft to thereby lift the teeth, extend the teeth outwardly, lower the teeth and draw the teeth inwardly toward the cutters, an apron on the Vehicle extending forwardly from the cutters over which the teeth are drawn, and packers mounted for oscillating movement on the vehicle above the apron and adjacent the cutters, the packers being operatively connected to the motor to be oscillated thereby to pack material toward the cutters.

DAVIS R. GARRETSON.

REFERENCES CITED rlhe following references are of record in the 111e of this patent:

UNITED STATES PATENTS Number Name Date Re. 2,192 Craven et al. Mar. 13, 1866 1,053,467 Allen Feb. 18, 1913 1,081,201 Blunck Dec. 9, 1913 1,105,006 ySpencer July 28, 1914 1,200,937 Hannaford Oct. 10, 1916 1,593,952 Ribbans July 27, 1926 1,786,226 Bradley Dec. 23, 1930 2,394,996 Hill et al. Feb. 19, 1946 2,439,259 McCormack Apr. 6, 1948 FOREIGN PATENTS Number Country Date 25,373 Norway Mar. 18, 1914

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