US1599698A - Road scraper - Google Patents

Description

ROAD SCRAPER Filed Feb. 20, 1922 raad 3 Sheets-Sheet 2 Sept. 14 1926.

Filed Feb- .20, 1922 3 Sheets-Sheet S JH faodA atto: wus

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Patented Sept. 14, 1926.

UNHTE S'ilit'tld JOHN H. wooD, or anno, NEVADA.

ROAD saneren.

Application led February 20, 1922'. Serial No. 538,000.

This invention relates to new and useful improvements in road Scrapers and is designed to provide a machine for both gathering, carrying and depositingthe load of dirt upon the surface upon which it is operating.

In a great many scraping machines with which I am acquainted, I have found it necessary to drag the scoop or scraper over the ground, after it has been loaded to its point of deposit, and it is to overcome the disadvantages incident to such an operation that I have designed the present construction, which overcomes ground friction when transporting the scraper from place to place after loading.

It is an object of my invention to provide a scraper or scoop provided with means for supporting it in ground engaging position and with means for automatically lifting the scraper from a position of loading or scraping to that of avload carrying position.

It `is a further object of this invention to provide a novel arrangement for carrying out the functions above outlined.

ther objects and advantages will be apparent to those familiar with road building and machinery designed for this purpose.

In the accompanying drawings forming a part of this application- Figure 1 is a side elevation of vmy road scraper with one wheel removed and the axle in section;

Figure 2 is a plan view thereof;

Figure 3 is a rear elevation thereof;

Figure 4 is a perspective viewpartly in section of a portion of the scraping and scooping` blade;

Figure 5 is a sectional view yof the blade, illustrating its supporting and tilting mechanism. "1

The scraper includes a frame and draft tongue 1, the frame being mounted upon wheel 2 which in turn are journaledupon an axle 4. The wheels are provided with overrunning ratchet or clutch mechanisms 6 which permit one of the wheels to travel at a. greater rate Iof speed than the other when the scraper is making a turn. This arrangement is necessary since the axle 5 is turned by the wheel 2 as will be hereinafter explained.

.Iournaled on the axle 4, for swinging movement by means of straps 8 is an oscillatory radial beam 9, as shown in Fig. 5, the upward movement being indicated by the arrow in the dotted circle. The side portions yally connected with the scraper at the rear end thereof and at each side respectively is a secondary supporting arm k16 which connects 'with its cooperating main supporting arm 1() at the front of the scraper through a pin andr slot arrangement, the slot 17 being formed in the arms 16 and the pinA being carried by the arms 10.

Mounted upon the axle 4 and rigid therewith is a drum 18, around which passes a clutch band 19 fixed at one end to thebeam 9 and at the other endto a crank portion 20 of a hand-operated lever 22 pivoted at 23 to said beam. The purpose of this will be clear. FVhen the scraper blade 15 is in the position shown in Figure 5, it is 'elevated above the road surface, and is dumping or has dumped its load. lower said` blade into scooping or scraping position. The lever 22 is thrown forward, causing the band 19 to tightly engage the drum 18, which latter being rotated by the axle, willcause the beam 9 to `swing forward or clockwise to lower the scraper onto the ground. Y

Journaled on said` axlel 4` for relatively normal free rotation is a pulley or spool 24, arranged alongside of anden the same axis as the drum 18 around which-is adapted to be wound an elevating chain 25 connected respectively with the rear end of the scraper `blade and with said drum. A clutch or shifter lever 26 pivoted to the rear side of the beam 9 at 27 is for the purpose of shifting the pulley or spool 24 into engagement with the fixed drum 18, whereby when said drum and pulley are in clutching engagement, rotation will be imparted to said pulley 24, and the chain will be wound thereon to elevate the rear end of said scraper blade 15 when it is desired to dump the dirt which has been collected, all as shown in Figure 5.

I have so constructed my invention that when the scraper blade 15 is in its lower and ground engaging position, a direct pull on the vehicle exerted in a horizontal direction will be applied to said blade. To this end I provide a draft tongue 1 which has its forked inner ends pivotally connected as shown at 29 to the lower free ends of sus- It is now desired to pension arms or straps 28, the latter being carried by the oscillating beam 9, as clearly shown in Figure l of the drawings. This draft tongue, therefore, is suspended from the oscillating beam 9 and it is obvious that a pull upon the draft tongue will have a tendency to swing the beam 9 in an upward direction, thus causing the scraper blade to be elevated, as shown iii dotted lines in F ig. l.

In order to prevent the beam 9 from swinging upwardly when pull is exerted on the draft tongue and at the same time permit the scraper l5 to remain in its lowered ground engaging position, I provide sul stantially a locking mechanism consisting of a lever 3l whicliis pivotally connected at its lower end to the draft tongue, as shown at 31a. The rear edge of the lever 3l adjacent its upper or free end is provided with a plurality7 of notches 3lb into any one of which may be engaged the forward edge of the oscillating beam 9, as clearly shown in Figure 3 of the drawings. In Figures l and 3 it will be observed that the lever 3l is in a `rearwardly inclined position and having one of the notches 3lb engaged with the forward edge of the beam 9, thereby locking said beam 9 against an upward movement when pull is exerted on the draft tongue l. Vhen it is desired to elevate the scraper blade l5, it is only necessary for the driver to lift outwardly on the lever 3l, thereby disconnecting 'the saine from the beam 9 and the continued pull exerted on the draft tongue will obviously cause said beam to be oscillated to a position as shown in dotted lines in Figure l and correspondingly bring the scraper blade. to its elevated position.

The device is now loaded and in position to transport its load of dirt to the desi-red place of deposit. To dump the load, the pulley or spool 24 is moved into clutching engagement with the drum 18 by the clutch lever 26. The spool is thus caused to rotate with the axle and the cable or chain extending from the spool to `the rear center of the scraper blade is wound on the spool until the rear of the .blade is elevated sufficiently to allow the dirt to slide out of the blade and spread along the ground. After the yload has been -deposited in the above manner, the

clutch lever 26 is gradually released, thus allowing the rear end of blade to depress once more to a position in which the said blade will be horizontal. This completes the cycle of operation in gathering and depositing a load of dirt.

The seat 30 is supported directly upon the axle l by pedestals 32, the lower ends of which are formed into eyes 33 which encircle the aXle, the latter rotating within said eyes. In view of the fact that it is necessary for the seat to have means for maintaining it in horizontal or substantially horizontal position on its vertical support-s 32, I have provided said seat with a transverse passage 34 through which loosely passes a rod 35, the forward end of which is pivotally connected at with a forward portion of the draft tongue l. The rear end of said rod passes through an eye 36 of a rearwardly and upwardly extending bifurcated supporting guide and brace 37, the inner or lower end of which is rigidly attached at 38 to the underside of said seat.

By this arrangement, any tendencies of said seat toward a vdecided tilting, when the -draft tongue l has been elevated to cause the load to `be rais-ed from the road surface, as clea'ly shown in Figure l, is overcome, said rod merely sliding through the passage in the seat and through the cooperation of the guide or brace 37 maintaining the pedestals 32 in substantially vert-ical position.

Having described my invention, what I claim as new and desire to protect by Let' ters Patent, is

A scraper structure comprising a wheel mounted frame having a draft means attached thereto, a beam pivotally mounted upon `the frame, arms pivotally connected with the free ends of the beam, a scraper blade pivotally connect-ed with the arms, levei operated means mounted upon the draft means and engageable with the scraper blade y.

to hold tlievsame in an elevated position and means for supporting the rear end of ,the

scraper and co-acting with the beam and JOHN H. WOOD.

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