US1325880A - Bruce b - Google Patents

Description

B. R. AND S. J. PURVIANCE.

SCRAPEB.

APPLICATION FILED MAR. 14'

Patented Dec 23, 1919.

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seminar.

Specification of Letters-Patent. w Patented Dec, 23, 1919.-

Application filed March 14, 1919. Serial'li'o. 282,873.

To all whom it may concern.'.

Be it known that we, BRUCE R. PU'RVI- ANOE and SAMUEL J. PURvIANon, .both citi- Zens of the United States, residing at Bellota, in the county of San Joaquin, State of California, have invented certain new and .useful Improvements in Scrapers; and we do declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvements in scrapers, particularly of a type adapted to be drawn by a tractor, but which may also be horse-drawn ifdesired, the principal object of the invention being to provide a scraper easily operable by one man whlch dumps its load by raising the scraper vertically from the ground instead 'of inverting the scraper and thus having to lift momentarily the entire weight of the load of dirt scraped.

As a second object we have produced a scraper on which the operator "may ride whether the load is being scraped or dumped, instead of having to walk alongside the same, as is the case withthe present form of scrapers.

A further object is to provide a scraper which has few. wearing or movable parts and which will be inexpensive of construction and yet extremely eiiicient for. thepurpose 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 claim.

n the drawings, similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a top-plan view of our improved scraper.

Fig. 2 is a side elevation of the same, showing the raised position thereof in dotted lines.

Fig. 3 is an enlar ed fragmentary sectlon ofthe lower end o the scraper, taken on a line 33 of Fig. 1.

Fig. 4: is a fragmentary cross section through the dirt retainer adjacent the connection thereof with the wheel supporting shaft.

Referring now more particularly to the figures of reference on the drawings, the numeral 1 represents the main frame of the to the frame 1 by a single bolt 1 10, and

scraper, substantiallv V-shaped ona horizontal plane, with the apex at thforward end thereof, to the rear ends of which is secured the end plates 2 of the scraper, these being \wider than the frame 1, the lower one 3 of which is of comparatively heavy material and normally lies adjacent-the ground and forms the'scraped plate.

These end plates are substantially vertical and are braced and stiffened by angle memhere 4, each secured to the plates 2 and 3 and and by braces 4 running from the frame 1 thereto.

. The braces 4* are adjustable relative to the frame 1 in order that the angle of the frame with the scraper proper ma be lessened, in the event that a hard soil is being scraped, the bolts 1 in that case being loosened while this adjustment is being effected. The scraping plate 3 is further'stiffened by means of an angle iron 5 positioned lengthwise thereof .or transversely of the scraper and secured to the members 4 under the same, the plate 3 sloping somewhat from its upper to its lower edge toward the front end of the scraper. Y

Side plates 6 are secured to the end plates and are suitably braced from the frame 1 by straps or similar means as shown at 7.

Positioned on top of the members 4 are bearings 8 in which are turnably mounted a shaft 9 whose ends turn down normally at a slant at each end parallel to and adjacent the side plates 6 to form arms as at just beyond end hearings or guides 10 secured'to the plates 2, which arms have spindles 11 projecting therefrom on which are turnably mounted supporting wheels 12.

is pivoted to one end of a bar 14:, which run forward to a lever arm 15' connected to a hand lever 16 positioned on a platform 17 secured to, the frame 1, on which platform and adjacent the lever is also a ratchet quadrant 18, the lever being held in any desired position on the quadrant by means of a pawl 19 thereon adapted to mesh with the ratchets 'of the quadrant 18.

At the forward end or apex of the frame 1 is a draw bar 20 adapted to be connected to the draw bar of a tractor 21. to pull the scraper 1 and which holds the front end up.

Should it he desired to use draft animals to ull the scraper, a tiller wheel .is prefera ly positioned under the front end of the frame 1 and the animals eonneigted tothe drawbar 20.

The operation of the device is as follows Supposingit is desired to scrape a load,

the lever 16 is positioned as shown in Fig.

2, in which position the scraping plate '3 is adjacent the ground. When it is desired to dump the dirt 22 scraped up, the lever 16 is pulled by the operator, who stands and rides on the platform 17.

This pulling of the lever operates to raise the scraper and frame thereof about the wheel spindles 11 as a fulcrum, the entire scraper frame raising by reason of the lifting lever action of the relative positions of the main'shaft 9 and the spindle 11, such raising taking place with the drawbar 20 a fixed or pivotal point in the vertical plane of movement.

While the wheels 12 in the dotted raised position in Fig. 2 are shown back of their original position, this action will not be had in practice, as the tractor or team, pulling the scraper constantly forward will counteract this condition, and actually the wheels 12 will merely remain stationary for the fraction of time necessary to raise the scraper to the dumping position.

It will thus be evident that the scraper having no bottom to hold and carry the dirt, it will not be necessary to invert the scraper as is usually the case, the amount of raise of the scraper necessary to leave .of the invention, as defined by the appended claim.

Having thus described our invention, what we claim as new and useful and desire to secure by Letters Patent is:

A scraper comprising a bottomless dirt retainer, a frame secured to and extending forward of the retainer, bearings on top of the retainer, a shaft turnably mounted in the bearings and extending beyond the ends of the retainer, arms on the shaft turning downwardly and normally at a slant to the horizon, and wheels mounted on the lower ends of the arms, the shaft being arranged to turn to alter the angular position of the arms.

In testimony whereof we affix our signatures in presence of two witnesses.

BRUCE R. PURVIANCE. SAMUEL J. PURVIANCE. Witnesses FRANK H. CARTER,

BERNARD PRIVAT.

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