US1724370A - Scraper - Google Patents

Description

13, 1929- B. E. ROSE ET AL SCRAPER Filed Sept. 8. 1926 2 SheetsShee1- 1 r I g r 1 O0 23 INVENTORS B.E. Ros e G'eo Woolwine Aug. 13, 19 29. 5, ROSE r AL 1,724,370

SCRAPER Filed Sept. 8, 1926 2 Sheets-Sheet 2 INVENTORS,

B.EROse By Geo. Woolwizgg Patented Aug. 13, W29.

ril'rao s'rr mane BRUCE E. ROSE, OF STOCKTON, AND GEORGE WOOLWINE, OF SELMA, CALIFORIITIA.

SCRAPER.

Application filed September 8, 1926. Serial No. 134,182.

This invention relates to improvements in scrapers, and particularly to that type known as rotary scrapers used for loading and transporting dirt for grading and like purposes.

The principal object of the invention is to produce a simple and easily operated means whereby the scoop or bowl of the scraper may be so pivoted and have the draft pull connected therewith at such a point that when the scraper is empty or loaded it may be quickly transported over the ground surface without taking on dirt when empty or without losing any of the dirt when loaded. In conjunction with said draft means we aim to provide a means whereby the normal pull thereof on the scoop, as above described, may be altered to position the scoop so that it can readily take on a load of dirt and which, when loaded, may be allowed to automatically return to its normal position for transportation, as above indicated. 7

A still further object of the invention is to produce a trip connection between the scoop or bowl of the scraper and the draft means whereby the scoop may be released for rotation relative to the draft means so that it may be automatically dumped at such point as may be desired.

These objects we accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views:

Fig. 1 is a side elevation of the complete scraper as it is shown in digging or loading position.

Fig. 2' is'a longitudinal section through the center of the scraper showingthe position of theparts when they arev in normal position for transporting the scraper from one point to the other.

Fig. 3 is a top plan view of one end'of the scraper scoop showing how the various operative parts are connected therewith.

Fig. 4 is a fragmentary view showing in detail the trip operating mechanism,

. Fig. 5 is a side elevation of a modified form of scraper from that shown in the other views showing the scoop in the normal position for transportation. Referring now more particularly to the are pivoted at their lowerends as at 5 to characters of reference on the drawings, the numeral 1 designates the scoop or bowl of the scraper, which-in its normal position for transportation is tilted upward upon its rear end and lower edge, as at A. Curved runners or shoes 2 are positioned at each end of the scoop 1 and extend overthe-front and top sides thereof to form traveling supports for the scoop when it is revolved into unloading position. Pivoted to'ea'ch end of the scoop by any suitable means, as at 3, are drawbars 4 which preferably incline downwardly from the plane Ofitl1.l10ilzontal line of the pivotal points 3 and which .70 the tongue or otherdraft member 6 of the scraper. The drawbars 4 are preferably provided with extensions 7 beyond' the pivotal points 5. Upstanding bars or like supports 8 are secured on the draft member 6 adjacent each of the extensions 7, and tension springs 9 are interposed between the outer ends ofthe extensions 7 and the supports 8 to normally maintain the scoop substantially on its pivot point A when the same is being transported from one'point to the other, so as to prevent any slight pivoting thereof on the pivot points 5 which might result in a loss'of some of the load, or interference with the ground surface, which might result in imperfect action of the scraper.

. A bearing sleeve 10 isjmounted on the draft member '6' close to the extensions 7, and turnable within such sleeve is a rod 11 on the ends of which are small cranks 12, the crank pins 13 engaging slotted guides 14 in the ends of the extensions'7. 'A'lever 15 is fixed to the rod 11 and-moves adjacent a segment 16 mounted on the draft member 6.- A bellcrank 17 is-pivotedin the 'upper end of'the lever 15. To one end of the bellcrank 17 a rope. 18 is connected and extends to the drivers seat ofthetractor or other draft means used to propeljthe scraper from 1500 one point to another. On the opposite end of the bellcrank 17 a rod 19 leads to l connection with a spring pressedpinQO movablelalong the lower end of-the lever 15 for engagement in and out of a notch21 5 in the segment 16. When the pm 20 1s-1n'=- the notch 21 the parts of the scraper are in those positions assumed when the scoop is in its normal uptilted position for transportation, as shown in Fig. 2. In this position the line of the draft between the points BB is such as-to substantially maintain the parts in those positions while the scoop is being transported from one point to another.

The positive osition of the scoop relative to the the draw ar and draft means is maintained by reason of stop members 22 fixed at suitable points on the ends of the bowl and engaging trip dogs 23 pivoted on the drawbars 4.. Finger members 24 extend upwardly from the trip dogs 23 and are connected by links 25 with cranks 26 fixed on the ends of a rod 27 turnably mounted in brackets 28 fixed on the upstanding memhere 8 or otherwise arranged on the draft element 6. On this rod 27 is a lever 29 connected from which a pull rope 30 extends to the operators seat. Pull springs 31 normally hold these parts under tension to keep the trip dogs 23 normally under the stops 22.

When the scoop is to be loaded the driver pulls on the rope 18. This acts on the bellcrank 17 to cause the rod 19 to pull the P111 20 out of the notch 21. A continued pull. on the rope 18 pulls on the lever 15 to cause it to turn the rod 11. This action moves the cranks '12 downwardly causing the crank pins 13 acting through the slotted guides let to push the extensions 7 downwardly, causing the drawbars 1 to move on their pivotal points 5 to change the angle of inclination of such draw-bars relative to the scoop so that the scoop is then free to rotate on its pivotal point 3, until the stops 22 again contact with the trip dogs 23, at which time the scoop will be in the position for loading as shown in Fig. 1.

When the parts have been moved to the positions just above described it will be seen that the direct and normal pull between the points BB has been flexed downwardly at an angle at the point .5.

Forward movement of the draft. means then pulls on the draft member 6 and the drawbars 4: to cause the scoop to fill with dirt, it being held in itsfilli-ng position by the operator holding on to the rope 18 in order to keep the parts held down in loading position, as described.

\Vhen the scoop has loaded the operator releases hispull on the rope 18 and this ac- :tion then permits the line of the puIl be tween the points BB to be straightened out. This straightening out action automaticalliy throws the lever 15 back to its normal 1 position through the upward movement of the extensions 7 acting on the crank pins 13. cranks 12 and rod 11, and also the upward movement of the drawbars causes the trip dogs 23 to move up against the stops 22 and return the scoop to its position resting on the point A.

In order to make positive the return of the parts to normal transportation position the tension of the springs 9 overcomes the weight of the extensions 7 or any tendency of the scoop to have a forward tilting movement until the pin 20 again snaps into the notch 21, whereupon the parts are held in proper normal position.

The loaded scoop may then be transported to any position desired and when it is desired to dump same the lever 29 is pulled. This, through the medium of the rod 27 and cranks 26, links 25 and arms 24:, pulls the trip dogs 23 from engagement with the stops 22. forward side of the pivot point 3, then tips forward and the front edge of the scoop engages the ground and acts as a pivot point to throw the scoop over onto the runners 2. If

The scraper being overloaded on the it is desired to spread the dirt we provide.

secondary stops 22 spaced from the stops 22 which can be allowed to engage the trip dogs 23 when the bottom of the scraper is at right angles to the ground. Then with the continned forward movement of the scraper the dirt will be spread as is desired. Then when the scraper is to be again loaded the trip dogs 23 may be released from these stops 22 and the continued forward movement of the scraper will throw the bowl clear around into normal transporting position again.

From the foregoing detailed description it can be readily observed that we have pro duced a scraper which can be very easily transported from point to point when loaded or unloaded, which can be turned to loading position by a mere pull on the lever, changing the line of draft, and which when loaded will automatically return to transported position merely by letting goof the control lever, whereupon the pull on thedraft means straightens out the normal line of draft and returns the bowl to transporting position.

Also our improved and simple trip means ios for controlling the revolution of the scoop with the exception that the rope pulled lever for shifting the angle of pull of the draft means is done away with, and a hand lever 15 is substituted therefor. This hand lever 15 extends substantially longitudinally of the draftmember 6 while the notch 21* is in the lower end instead of the upper end of the segment 16 and the cranks 12 extend in the reverse direction to the cranks 12 for connection with the extensions 7 a of the drawbars 4?. Otherwise the construction is sub stantially the same as in the larger scraper,

The primary structure described although in the modified view the parts are more simplified and lighter in the interest of simplicity and economy.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects we accomplish by means .of

such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

We claim:

1. A scraper including a scoop, a draft means on the scoop including two elements hinged together, a projecting free end on one element provided with a longitudinal slot, a crank shaft journaled on the other element, a crank on the shaft having a pin in engage ment with the sides of the slot, and a lever to operate the shaft.

2. A scraper including a scoop normally tilted upwardly with its rear lower edge rockingly engaged with the ground, draw bars pivoted to the scoop and ated means mounted on the draft means and I operable to force the draw bars downward to allow the scoop to move from an upwardly to a downwardly tilting position, and means to normally hold the lever in fixed position when the scoop is in its upwardly tilting position while allowing it free and unrestricted movement between that point and V the point it assumes when the scoop is moved to its downwardly tilting position.

In testimony whereof we affix our signatures.

BRUCE E. ROSE. V GEORGE WOOLWINE.

Images