US1153997A

US1153997A - Two-way bucket excavator.

Info

Publication number: US1153997A
Application number: US48506509A
Authority: US
Inventors: Morton G Bunnell
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-03-22
Filing date: 1909-03-22
Publication date: 1915-09-21
Anticipated expiration: 1932-09-21

Description

M. G. BUNNELL.

TWO-WAY BUCKET EXCAVATOR. APPLICATION FILED MAR. 22. 1909.

1,153,997. Patented Sept. 21, 1915.

- 4 SHEETS-SHEET I.

W T/VESSES 4 M. G. BUNNELL. TWO-WAY BUCKETYEXCAVATUR. APPLICATION FILED MAR. 22. 1909.

PatentedSept. 21, 1915.

4 SHEETS-SHEET 2.

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M. G. BUNNELL. TWO-WAY BUCKET EXCAVATOR. APPLICATION FILED MAR. 22. 1909.

PatentedSept. 21, 1915.

4 SHEETS-SHEET 3.

W/TNESSZ'S M. G. BUNNELL.

TWO-WAY BUCKET EXCAVATOR. APPLICATION FILED MAR. 22, 1909 11 1533997, PatentedSept. 21, 1915.

4 SHEETS-SHEET 4.

' To all whom it may concern:

0 is an enlarged and the adjacent portion of the runway,

an to.

MORTON G. BUNNELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO FREDERICK C. AUSTIN, OF

' CHICAGO, ILLINOIS.

TWO-WAY BUCKET EXCAVATOR.

Specification of Ltters Patent.

Patented Sept. 21, 1915.

Application filed March 22, 1909. Serial N 0. 485,065.

Be it known that I, MORTON G. BUNNELL,

a citizen of the United States of America,

and resident of Chicago, Cook county, Illi- 5 nois, have invented a certain new and useful Improvement in Two-Way Bucket Excavators, of which the following is a specification.

My invention relates to excavators of that character in which a bucket or scoop is arranged to travel back and forth on a track or runway, and in which at least a portion of the saidtrack or runway is adapted to be lowered into the cut orexcavation, whereby the usual and well understood manner.

The object of my invention is the provision ofan improved bucket or scoop which operates back and forth on a runway extending across the ditch, and that will gather a load by motion in either direction, whereby it is never under the necessity of traveling idle or without a load, and of such character that, notwithstanding its capability of loading or excavating in either di rection, it is not necessarily longer than the ordinary single bucket, thus obviating the necessity of using either two separatebuckets or a double bucket, and also obviating the necessity of using a tilting or reversible bucket, all of which forms of bucket excavator have proved to be more or less unsatisfactory, at least under some conditions, whereas with my improved arrangement the bucket is adapted to load in either direction, without changing its relation to the runway, and is equipped with means for positively ejecting the load from either end thereof, as will hereinafter more fully appear.

It is also an object to provide certain details and combinations tending to increase,

5 my invention consists in matters hereinafter set forthand claimed.

In the accompanying drawings, Figure 1 is a front elevation of an excavator, embodying the principles of my invention. Fig. 2

side elevation of the bucket i Fig. 3 is a similar view, illustrating the conthe bucket or scoop is held to its Work, in'

dition of the bucket just after the load has been dumped. Fig. 4 is a section on line 4-4 in Fig. 3.

As thus illustrated, the platform-like body A of the excavator may be of any suitable, known or approved character. As shown, it is provided with wheels a adapted to travel on rails laid at opposite sides of the ditch or excavation B. At the front of the machine a V-shaped double runway C is mounted for bodily up and down adjustment. For this purpose the said runway is carried on a vertical guide 0 adapted to slide up and down uponthe post or standard a suitably supported or carried on the body of the excavator. This runway, it will be seen, is adapted to determine the contour or cross sectional outline of the ditch. At the left this runway is provided with a swinging outer end section D, and at its right with a similar section E. These swinging outer end runway sections are supported at their outer ends by links or braces 03 and e, which latter have their .upper ends pivoted upon a cross piece a secured to the upper end of the post or standard a, as illustrated. The two-way bucket F is provided with wheels f that travel in the grooves or tracks of the runway. The arrangement is preferably such that these wheels can move up and down in the said tracks of the runway, whereby the bucket can tilt in either direction sufliciently to load. When it travels to the left, then its cutting edge or lip f rises slightly, and its cutting edge or lip f is depressed, whereby a load is gathered. The bucket is tilted slightly in the other direction when it moves to the right. The said bucket is provided with a movable end wall f secured at its upper end to a set of angle irons 7, which slide on guides f rigidly secured to upper cross members f of the bucket. Thus the end wall f can slide from one end to the other of the bucket, its motion relative to the bucket being suitably limited in each direction, as by some suitable stop device. .The said movable wall has a middle post 7" that extends upwardly. At the left hand end of the bucket it is provided at its top with a cam block which is at the near side of the longitudinal center line of the bucket. At its other end, and at the far side of the longitudinal center of the bucket, it is provided with a similar cam block f- I post 7 guide 0.

The runway section D is provided with an overhead support d, consisting preferably of a pair of channel irons arranged close together and supported by cross bars 0?, carried on the runway. A hook f is pivoted to the said support d at its outer end, as by a pivot f, and its inner or free end is held against excessive movement by a chain f. The shoulder f of said hook is adapted to engage the right hand side of the post 7" of the movable wall of the bucket, as shown in Fig. 2. The support d is provided with a series of holes d whereby the pivot f of the hook can be moved along the length of the runway, thus varying the distance from the side of the machine at which the load can be discharged. When the bucket runs out to the left of the machine shown in Fig. 1, it passes the hook f and then when its motion is reversed the of the movable end Wall f engages the said hook, in the manner shown in Fig. 2. Then when the bucket is started on its return movement to the right hand side of the machine, the end wall f remains stationary, being held by the hook, and the bucket itself moves forward, thus discharging the load from the left hand end or mouth of the bucket, as shown in Fig. 3. For this purpose, an operating cable or other connection G is secured by links 9 to the right hand end of the bucket. A similar operating line or connection H is secured by links it to the left hand end of the bucket, as shown in the drawings. These operating cables or connections are arranged over sheaves g and h on the outer ends of the runways E and D, respectively, and are arranged to travel one at a time over the sheave c on the lower end of the The said cables or operating connections are then arranged over sheaves I at the top of the frame-work or superstructure of the machine, and are then brought down to drums or windlasses J and K. These drums or windlasses are operated by the engine L, and a boiler-NI furnishes the steam for the said engine. The boiler and engine and rotary drums are all suitably carried on the body or platform A of the machine.

The runway E has a support e, similar to the support 01, and is provided with a hook e similar to the hook f". It will be understood, of course, that the hook e is pivoted at its outer end, and has its free inner end adapted to engage the post f, as shown in Fig. 1. Thus when the bucket is drawn to the right hand end of the machine, as shown in Fig. 1, it passes the hook 6 and then when its motion is reversed, its movable end wall is caught and held by the said hook. The bucket then continues its movement toward the center of the machine, and in so doing the load is discharged from the right hand end or mouth of the bucket.

lVhen the bucket is hand end of the machine, it is finally released from the hook f by engagement of the cam block f with the cam f on the side of the said hook. In this way the end wall of the bucket is held stationary just long enough to enable it to discharge the load from the left hand end of the bucket, and then the hue :et is freed entirely from the hook f wit the result that it is then in condition to gather a load as it travels down into the ditch and toward the right hand side of the machine. After the bucket has discharged its load at the right hand side of the machine, as shown in Fig. 1, then it is freed from the hook'e by the engagement of the cam block 9 with a cam similar to the cam f, except that in this case such cam is on the far side of the hook 6 instead of on the near side, as shown in Fig. 2. In this way one hook has a cam on its front side, while the other hook has a cam on its back or rear side. It is with reference to this arrangement that the cam blocks f and f are arranged at opposite sides of the longitudinal center of the bucket, as well as opposite ends thereof. As stated, the bucket tilts down at one end and up at the other when it moves in one direction, and then tilts in a similarmanner in the opposite direction when it travels to the other side of the machine, whereby the'lip or edge which must do the cutting is always slightly depressed below the lip or edge that is traveling idle or behind. i The support 6 has a series of pivot or bolt holes similar to the holes d in the support 0!, whereby the load of the bucket may be discharged at the right hand side of the machine shown in Fig. 1. Thus the load can be discharged at either side of the machine, and at a varying distance from either 'side of the machine. Only a single bucket is used,'but it does not tilt or turn over to dump, and it does not turn around when it is required to load in the opposite direction. Notwithstanding that the bucket will load in either direction, it is not necessarily of greater length than whereby it is, notwithstanding the two-way character of the machine, well calculated to do the excavating in the usual and well known manner, and without interfering with the desired cross sectional contour or outline thereof. Thus a single bucket is made to do the work of two buckets, and this is accomplished without making the bucket of double length, and without causing it to tilt or turn around when its motion is reversed. Furthermore, its load is positively and forcibly discharged, so that it is adapted to work in all kinds of soil and give gendumped at the left a varylng distance from the ordinary single bucket,

eral satisfaction for varying conditions and circumstances.

Suitable provision is made for holding the runway C at different points in its up ward motion thereof after passing said catch, means for varying the position of said catch on the runway, and means on the bucket to engage said catch, for releasing said mechanism.

2. An excavator comprising a bucket or scoop, 'a runway therefor, a movable back therefor, means including clutch mechanism having a catch located at a predetermined point on the runway for operating said back 1 to expel the load from the bucket by the backward motionthereof after passing said catch, means for varying the position of said catch on the runway, and means on the bucket to engage said catch for releasing said mechanism.

3. An excavator comprising a bucketor scoop, a runway therefor, an ejector there for, means including clutch mechanism hav ing a catch located at a predetermined point on the runway for operating said ejector by the backward motion of the bucket after passing said catch, means for varying the position of said catch on the runway, and means on the bucket to engage said catch for releasing said mechanism.

4. An excavator comprisin a scoop, a movable back there or, a support having a hook for causing the back to stand still while the bucket moves backward,

bucket or means for holding'said support stationary adjacent the path of travel of the bucket,

means for adjusting the hook in different positions to vary the dumping position, and means on the bucket for automatically releasing the said hook when the load is entirely discharged.

5. An excavator comprising a runway provided with a hook, a bucket or scoop adapted to travel on said runway, a movable back for said bucket or scoop, means on the back adapted to be can ht and held by the said hook, means for a justing the hook in diiferent positions to vary the dumping position, and means on the bucket for engaging said hook to release the same from the back.

6. The combination, in an excavator of the character disclosed, of a bucket or scoop, a movable back therefor, a runway for the bucket or scoop, means including clutch mechanism having a catch supported on the runway for operating said back to expel the load from the bucket by the backward motion thereof after passing said catch, means for supporting the runway in position for holding the said bucket or scoop down in .the ditch or excavation, means above'ground for changing the position of said catch on the runway, and means on the bucket to engage said catch for automatically releasing said mechanism.

7. The combination, in an excavator of the character disclosed, of a bucket or scoop, a movable back therefor,.a support having a hook for causing the back to stand still while the bucket moves backward, means for holding said support stationary adjacent the path of travel of the bucket, means for automatically releasing the said hook when the 'load is entirely discharged, and a runway for holding the said bucket or scoop down in the ditch or excavation.

8. The'improved excavator, comprising a runway and bucket thereon, an end wall for the bucket, a hook adjustably' pivoted on the runway, for holding the said wall stationary to dump the load, and means on the bucket for releasing said hook, substantially as shown and described.

9. An excavator comprising a runway, a bucket mounted to travel back and forth on said runway, said bucket having a movable wall for expelling the load, a catch on the runway for holding said wall stationary while the bucket moves a distance in the reverse direction, after reaching dumping position, means on the bucket for automatically disengaging said catch from said wall, and means for operating said bucket, said catch comprising a pivoted hook, and a cam on said hook, to engage said means on the bucket.

10. An excavator comprising a runway, a bucket mounted to travel back and forth on said runway, said bucket having a movable wall for'expelling the load, a catch on the runway for holding said wall stationary while the bucket moves a distance in the reverse direction, after reaching dumping po sition, means on the bucket" for automatically disengaging said catch from said wall, means for operating said bucket, said catch comprising a hook pivoted on the runway, and means for limiting the downward movement of said hook.

11. An excavator comprising a runway, a bucket mounted to travel back andforth on said runway, said bucket having a movable wall for expelling the load, a catch on the runway, for holding said wall stationary while the bucket moves a distance in the re verse direction, after reaching dumping position, means engaging the free end of said catch to limit the downward motion thereof, means on the bucket for automatically disengaging said catch from said wall, and means for operating said bucket, the said bucket having tracks for said wall.

12. An excavator comprising a bucket or scoop having a cutting edge at each end thereof, a runway down in the ground, wheels for the opposite ends of said bucket, traveling on said runway, draft connections for the bucket, said runway having clearance for the tops of the wheels, cooperating with said connections to cause the bucket to tilt downward at either mouth thereof while operating in the ground, and means for operating said connections to move the bucket back and forth on said runway.

18. An excavator comprising a bucket or scoop having a cutting edge at each end thereof, a runway for holding said bucket down in the ground, wheels for the opposite ends of said bucket, traveling on said runway, draft connections for the bucket, said runway having clearancefor the tops of the wheels, cooperating with said connections for holding said bucket" to cause the bucket to tilt downward -at either mouth thereof while operating in the ground, and means for operating said connections to move the bucket back and forth on said runway, said connections being above the axes of the wheels.

14. An excavator comprising a bucket or scoop having a cutting edge at each end thereof, a runway for holding said bucket down in the ground, wheels for the opposite ends of said bucket, traveling on said runway, draft connections for the bucket, said runway having clearance for the tops of the wheels, cooperating with said connections to cause the bucket to tilt downward at either mouth thereof while operating in the ground, and means for operating said connections to move the bucket back and forth on said runways, said connections extending above the axes of the wheels and each having a fixed point of attachment at one month of the bucket.

Signed by me at Chicago, Illinois, this 12th day of March 1909.

MORTON G. BUNNELL. \Vitnesses:

CLARENCE E. TAYLOR,

J. NORBY.