US1793968A - Scraper - Google Patents

Description

J. M. SILVA Feb. 24, 1931.

SCRAPER Filed Jan. 2. 1930 2 Sheets-Sheet 1 INVENTOR. 757zn 722. qSz'Zva:

BY W ATTORNEYS.

Feb. 24, 1931. J. M. SILVA 1,793,968

' SCRAPER Filed Jan. 2. 1930 2 Sheets-Sheet 2 J 772 6 V EN TOR. 07272 6 Va A TTORNEYS.

Patented Feb. 24, 1931 PATENT OFFICE .JOHN MARIA SILVA F VOLTA, CALIFORNIA SCRAPER Application filed January 2, 1920. Serial No. 418,072.

Myinvention relates to earth scrapers.

In accordance withmy invention, IPIO- vide an earth scraper which is adapted to be'secured to a tractor or otherdraft appliance, and so constructed that the dumping and return operation of the scraping element may be controlled by the operator at the draft appliance.

The scraper .is .of simple construction, lostrong, durable, and easy to operate.

Inthe accompanying drawings, forming a part of this specification, and in which like numerals are employed to. designate like parts throughout the: same,

1 Figural isaperspective viewof a scraper embodying my invention, showing the scraping element in the active 1 position,

Figure 2 is a similar view. showing the scraper elementin a dumping position, 1

Figure 3 isaside elevation ofthe scraper, parts in vertical section, i i

Figure 1 is a similar view, showing the scraper element in the dumping position, and, '5' Figure 5 is a perspective View of the scraper element.

The scraper embodies a forward transverse scraping element 10, which is preferably formed of bottom boards 12, arranged 3 at an angle, and rigidly connected by means of metal straps 13 and 14. The bottom boards 12 are transversely arranged at an angle and they are rigidly connected with ends 15, having forward convex faces 16.

Metal runners 17 which are longitudinally curved and convex, are secured upon the curvedfaces 16. A metal blade 17 is arranged upon the forward side of the lower bottom board 12 and is attached thereto and projects forwardly beyond the same.

' The numeral 18 designates a tail-board,

the forward end of which is pivotally connected with the bottom'of the scraper elem'ent, by means of a hinge joint including 42" leaves 19, rigidly attached thereto, and pivotally connectedwith leaves 20, by means of a pin 21. The leaves 20 are rigidly attached to the lowerbottom board 12, near andspaced from the lower edge of the bottom of the so scraper element. The scraper element is,

the tail-board 18, near its rear end.

shown. lVhen the arm 21 nears the end therefore, pivotally connected with the tailboard to swing vertically longitudinally of the tail-board. When the scraper element turns forwardly in the dumping operation, it rolls upon the curved runners 17, as shown. as

Rigidly attached to the upper edge of the bottom of the scraper element, by means of the strap irons 14:, is a preferably curved rigid arm 21, having an extension 22, adapted to engage with and rest upon a saddle 23, to

which is resiliently supported by a spring 2 1, the lower end of which is attached to the rear end of the tail-board 18, as shown. When the scraper element is swung rearwardly to. the scraping position, theextension 22 engages the saddle 23 and the rearward movement of the scraping element is stopped and shocks absorbed. I

The arm 21 is provided near its, rear end with a block 26, embodying a pulley and a block 27, embodying a pulley isfsecured to A flexible element 28, such as a rope or cable,has one end secured to theblock 27, and is passed about the pulley of the block 26 and the pulley of the block 27, and this flexible element extends forwardly beyond the scraper and may be secured to a part of the tractor. Yielding means is also provided to limit the forwardmovement of the scraper, including a flexible element or cable29, attached to. the arm 21, near its rear end, and this flexible element is attachedto a retractile coil spring 30, securedtothe tail-board 18, as

of its forward swinging movement, such movement is opposed by the spi'ing30,. as clearly shown in Figure 4:.

The numeral 31. designates upstanding draft attaching bars or straps, extending 00 transversely of the boitom of the scraper, and rigidly secured to the same, at their ends by'any suitable means.

These straps orhars havelongitudinal sets of apertures 32, formed therein. The numeral 33; designates a draft as element, preferably V-shaped and having its rear ends adapted to be secured into selected, apertures 32,at the desired elevation. The higher the elevation of attachment of the draft element 33 with the bars 34;, the greater the tendency for the pull upon the scraper, to shift the scraper element to the dumping position; The element 33 is attached to a tractor or other draft appliance.

In the use of the scraper, the draft ele- ,ment 33 pulls the same forwardly and the flexible element 28 may be retained suitably taut to oppose the forward swinging move ment of the arm -21. The blade 17 will scrape the earth which will pass intothe scraper element. hen it is desired to' dump the scraper element, the cable 281i released and the pull upon the draft ele ment 33 will cause the scraper element to roll or rock forwardly upon the convex runners 17 until the scraper element assumesthe dumping position shown in Figure 4. To reset the scraper element, the operator, at a distance, such as at the draft appliance, pull-s the flexible element-28, which swings the arm.

21 'rearwardly, thereby returning the scraper element to the active position, the rearward swinging-movement of the arm 21" being limited by extension 22 engaging saddle23. r j v It is to be understood that the form of my invention, herewith shown and described,-

is to betake'n as a preferred example of the same and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of my invention or the scope of the subjoined claims.

-Having thus described my inventionf l 1. An earth'scrapercomprising a scraper element, a tail-board pivoted to the scraper element and extending rearwardly of the same, an arm substantially rigidly attached to the scraper elementand extending rearwardly of the same and longitudinaly of the tail-board, the rear end of the arm being free from connection with the tail-board, said tailboard having a part to engage with the rear end of the arm when the arm is swung to the lowered position, means to swing the arm position when the scraper element is released. I

3. An earth scraper comprising a scraper element, a tail-board pivotally connected with the lower portion of the scraper element and extending rearwardly beyond the same,

an arm substantially rigidly attached-to the upper portion of the scraper element and extending rearwardly of the same and longitudinally of the tail-board, shock absorbing means engaging thetail board and arm when thearm is swung downwardly to a point near the end of its travel, means to swing the arm downwardly toward the tail-board and adapted to be operated at a point remote from of the rear end of said arm, resilient means connecting the saddle with the tail-board,

means to draw the arm toward the tail-board including :pulleys secured to the arm and: tail-board and a flexible element'eng'aging the pulleys and adapted to extend to a point remote from the scraper element, draft attaching elements securedto thescraper elethe scraper element, and draft means at mentand extending transversely thereof, a

draft element, means whereby the draft element may be secured to the draft attaching elements at different elevations.

in testimony whereof I affix my signature.

' JOHN MARIA SILVA.

downwardly toward the tail-board, anddraft means'connected with the scraper.

- 2. An earth scraper comprising a scraper element, a tail-boardpivoted to the scraper element "and extending re'arwardly of the same, an armsubstantially rigidly attached to'the scraper element and extendingrearwardly of the sameand longitudinally of the tail-board, the rear end of the arm being free from connection vwith the tail-board, said tail-board having a part to engage with the rear end of said arm when said arm is swung to the lowered position, means connecting the armand tail-board to swing the arm down wardlytoward said tail-board, said means being adapted to be operated-at a point remote from the scraper element and draft means connected with the scraper element and adapted to shift the same to a dumping

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