US1160572A - Bucket excavator. - Google Patents

Description

M. G BUNNEL L.

BUCKET EXCAVATOR.

APPLICATION FILED JUNE 6, 1910.

Patented Nov, 16, 1915.

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l. a n 1? Uruarn s BUCKET nxoavaron,

To, all whom it may concern I Be it known that I, MORTON G. BUNNELL, a citizen ofthe United States of. America, and resident of Chicago, Cook county, Illi nois, have invented a certain new and useful Improvement in BucketEXcavators, of which the following is a specification.

My invention relates to excavators of that kind in which arunway is providedfor excav'ating buckets or scoops, which runwayis provided with a curve or bend which enters the,

ground, whereby the said scoop or bucket moves downward and then upward, the curve or bend in the runway being such that the edge of the bucket or scoop does not, at such time, assume the most efficient cutting angle, but

stands at such an angle that it simply scrapes, which isparticularly objectionable when the excavator is working in hard ground. I a

The object of my invention isto provide an improved cutter which will travel ahead of the bucket or scoop, which will work. as well, and possibly better, during theportion of its travel where it passes around said curve or bend in the runway, thus insuring an efficient cutting action at all points in'the path of the bucket or scoop, especially at the curve or bend where ordinarily the position of'the bucket or scoop is such that its edge does not a'ssur'ne'a correct cutting angle,

and which will run in the same tracks of the runway that are provided for the wheels of the bucket or scoop, without any sliding or other movable connections between the cut ter and the wheels thereof. 7

To this and other useful ends, my invention consists in matters hereinafter set forth and claimed. g

In the accompanying drawings, Figure 1 is a front elevation ofthe lower portion of a runway, showing the curve or bend therein, and showing also a bucket'or scoop with a cutter in front thereof. both the bucket or scoop and the cutter traveling in one and the same runway, and said cutter involving the principles of my invention. Fig. 2 is an enlarged section on line 22 in Fig. 1, looking at the rear of said cutter. Fig- 3 is a side elevation of the cutter shown in Fig. 2."

As thus illustrated, the runway A may be of any suitable character, and has a curve or bend a at the bottom of the ditch. The bucket or scoop B has front and rear wheels Z) and b that run in the tracks of said run Specification of Letters Patent; p t t z u v, 1 1915, Application filed J'uneB, 1910. Serial No. 565,220. r

way, It will be seen that the said front wheels 6 are somedistance ahead ofthe rear wheels, whereby the bucket while rounding the curve or bend assumes a position that makes the edge of the cutting blade 6 scrape instead of cut-that is to say, the edgeat such time does notassume its most eliicient cutting. angle. This is objectionable, especially in hard ground, as the bucket or scoop is subjected to unnecessary strain, and is liable not to properly collect its load.

Tloobviate this difficulty, the cutter C' is arranged to travel ahead of the bucket or scoop andloosen up the dirt. The said outter is triangular in shape, having front and blade is on a line'drawn fronithe' axis of} curvature of the runway through the axis of the wheels 0, which is the correctanglefor cutting. 1 Preferably, the cutter is connected with the front of the bucket or scoop B by means of links Dyand has links E for connection with the operating rope or cable. It will be seen that the blade 0 is always the proper distancefrom the'runway, so as to cut properly in front of the bucket or. scoop,

and that no sliding or other connections are necessary between said blade and the upper or wheeled portion of the cutter. Thus the whole cutter structure is verystrong and rigid. The angle of the blade 0 is even better while rounding the curve, as at such time it is a little farther away from the bucket or scoop, and is down a little flatter on the surface of the ground. In this way the cutter C works effectively at the time when it is most necessary for it to do so, which is when the bucket is forced to assume its impaired angle for cutting. As shown, the cutter C is bail-shaped and, like the bucket or scoop, arranged to travel between the two sides of the runway. The cutter serves as a link in a chain or series of links by which the line of draft'is, kept in line with the runway, even while the bucket or scoop is rounding the curve. This makes the same run easier and smoother.

It is obvious that my invention is applicable to runwaysof different shapes. In other words, the runway is not necessarily of the shape here shown, as anyrunway 1n snor no rnnnnnroir o. AusTINfori CHICAGO, ILLrno s. 4 v

the bucket goes around a curve or bendit is.

preceded by a cutter, and the exactjan'gle of the bucket at such time is unimportant;

' Also, my invention isapplicableto excavatorhaving one or more buckets, regard;

less of the method ofoperation thereof.

"By this arrangement the bucket andcutter travel in the same run\vay,zand.whilethe curve or deflection in the runway impairs the cutting angle of the bucket, such curve or deflection does not 'impairthe cutting angle ofthe cutter. Thusthe bucket can. be

"of greater length and g What I claim as my inventionisi capacity than without the cutter. V i

I do not limit myself to the exact c611 struction shown and described.

1. In an excavator, a runway having tracks, a bucket adapted to travel thereon, a cutter traveling on the said runway, links connecting the. cutter with the bucket, and. links connected tow the front of the cutter,

to keep the draft in line with the runway, all of said links traveling in the tracks of the runway. a f. 1

2. In an excavator, a runway having a curve therein, a' wheeled bucket adapted to travel thereon, said bucket having a relatively long wheel base, wherebyitscutting v anglechanges.objectionablywhilerounding said curve, and 'a cutter traveling in front of'the bucket,said cutter having a blade the edge of which is ona line drawnfrom the axis ofcurvature, a set of wheels the axis of which 1s also on SaldllIlB, and another 'ing said curve.

set of wheels the axis of which is a distance from the first wheels, the two axes of said wheels bearing a fixedrelation to each other, and being a relatively short distance apart, whereby the'cuttingv angle of said cutter does not change objectionably while round- 3. In an excavator, arunway' having a l curve therein,- a wheeled bucket adapted to travel thereon, of allength to. impair the cutting angle thereof while rounding said curve, afcu'tter for looseningall the {dirt inadvance of the bucket, traveling. onthe same runway,*and meanskwhereby the cutterhas-abetter cutting angle while rounding the, curve than while traveling straight ahead. V v

1 4. In an: excavator, a runwaywith a curvev therein, a wheeled bucket. adapted toxtr'avel, .on-said runway, having a wheel base, ofsuch length that its cuttingiangle changes ob-' jectionably while rounding said curve, a bail-shaped cutter for-loosening all thejdirt angle and a-consequent loss of cutting eth- 'inffront of said bucket, having triangular shaped sides, and front and rear wheels for; H

ciency thereof while roundingsaid curve,

thereby enabling Qsaid bucket to fill easily while operatingat the wrong angle for cutting.

, I MORTON IBUNNELL. Witnesses: a 1 1 3 v E. H. CLEG S. LEwIs.

Signed bv me atChicago,Illinois, at 1 11th day of May,.19l0;

i Copies of this patent may be obtained for five cents each, by addressing the Commissioner of. Patents, I

I Washington, D. (3.

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