US1585947A - Scraper - Google Patents

Description

May 25,1926. 1,585,947

D. R. THROOP SCRAPER M Filed Nov. 5, 1925 INVENTOR D. R l zro 0}) Patented May 25, 1926.

UNITED STATES AT OFFICE.

J DAMON a. runner, on sreox'ron, CALIFORNIA.

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a neaaonmea Kovemher3,,1925. Ma, No. 66,438.

This invention relates to improvements in scrapers and particularly represents an improvementjover that type of scraper shown in my Patent No. 1,464,687, dated August mama In this former device a fundmental feature was the arrangement of parts which caused the forward movement of the bowl lid then be positioned 'at the same the arts in the same position as in Fig. l,

to aid in enabling the means normally holding the same, to be easily released.

In this device however the movements of the bowl relative to its supporting frame were all controlled by asingle member. This structure was slow in operation and did not permit a setting of the scraperblade for difierent scraping depths which could be maintained undisturbed regardless of the number of dumping operations.

The principal ob ect of the present inven-- tion is to provide a scraper which while retaining the above valuable fundamental fea ture, is much quicker in operation, has means for setting the blade to scrape at any desired depth, andadditional means for enabling the bowl tobe' instantly upset withthe following specification and claims. 4d

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

Fig. 1 is a perspective view of the scraper in its scraping position. v

- Fig. 2 is a fragmentary side elevation with part y broken out toshow a catch feature. I ,lti 3 is a fragmentary side elevation. showing the catch released and the bowl turning to a dumping position. 7

Referring now more particularly to the characters of refer ace on the drawings, the numeral '1' denotesthe side flames of the scraper,'which are parallel at their rear ends and converged to a junction with each other sides of the bowl from the front to the rear at their forwardendspat. which ends they are provided with a clevis 2 for attachment to a tractor. A central longitudinal frame member 3 is mounted intermediate the framesl and is connected at its rear end to a transverse beam l'which is disposed some distance ahead of the rear ends of the frame 1. j

Disposed between the frames 1 to the rear of the beam t is a scraper bowl 5 of standard Fresno form, pivotally mounted on said frames by trunnions 6. Curved shoes 7 such as are ordinarily, provided on scrapers of this'character extendupwardly from the ends thereof.-

Turnably mounted on the frames 1 ahead of the bowl is a transverse shaft 8. From each end of the shaft ahorizontal arm 9 extends rearwardly on the outside of the bowl,

and is adapted to normally extend under a pm 10 projecting outwardly from the forwardside of the adjacent shoe 7. Another pin 11 concentric with the pin 10 with respect to the trunnions 6 is adj ustably mounted on the shoe a certain distance rearwardly of the pin 10. *Pivoted on a bracket 12 mounted on the central beam 3 ahead of the shaft 8, is a longitudinallyextending lever 13, which projects forwardly to a point adj acent the forward end of the scraper frame. An ordinary form of quadrant and pawl structure indicated at 14'is associated with this lever so that it may be maintained immovable at any position desired.

Projecting upwardly from the rear and pivoted end of the lever is a forked arm 15. A horizontal link 16 is slidably mounted in this arm, the rear end of this link being pivoted onto a vertical arm 17 which projects upwardly from and is fixed on the shaft 8. i 1

A transverse pin 18 projects through the arm under the link, and normally seats in the forward end of a catch notch 19 cut .in the side of said link.

A tension spring 20 between-the forward end of the link andthe frame 3 acts to'normally hold said notch'in driving engagement with the pin 18. Another tension spring 21 between the frame 3 and the arm I 17 acts to pull said arm forward, and consequently tends to raise the arms'9.

It will therefore be seen that when the lever'13is moved up or down, the arms 9 are similarly moved, causing the position of the pins to be altered, and consequently altering the angle ofvsetting of the'scraper bowl relative to the frame, This operation controls the normal setting of the scraper bowl. When raising the arms?) and tilting the bowl upwardly by this manipulation of the lever, the spring 21 aids this operation, offsetting the resistance of the bowl. When moving the lever in the opposite direction, the spring is placed in tension, but the bowl offers no resistance, since the arms 9 move away' from the pins 10. When the bowl is pulled forward by the forward movement.

of the frame, the bowl tends to rotate and tilt downwardly, causing the pins 10 to follow up and reengage the arms 9, thus causing the scraper blade to'be setto work at a predetermined angle. 2

'To enable the bowl to dump automatically with the forward movement of the frame, without touching the lever, or dis tnrbing any setting of the same which may have been made, I provide the following trip structure:

Pivoted at one end onto the pin 18 is a downwardly depending arm 22, the upper portion of which is at an angle to the lower portion, such that the arm issubstantially in the form of an inverted L.

The lower end of this arm is attached to a pull -cable,23 or the like, which extends forwardly to a point where it may be manipulated by the operator of the tractor hauling the scraper.

At the junction of the angled portions of the arm 22 is mounted a transverse member preferably in the form of a roller 24, this member beingunder and in the vertical plane of the link'16 but normally clear of the same, as shown in Figs. 1 and 2.

The shape of the arm is such that it nor- I mally hangs in this position without the aid of springsetc.

Since the arm is mounted in directconnection with the arm 15, of the lever 13, it

arms 9, this releasing of the link from the lever 13 which is held immovable enables said arnr9 to tilt down so that the pins 10 can pass by the same and allow tlggbowl to upset.

If the cable is then released the arm 22 immediatelyreturns to its normal position.

As soon as the pins 10 pass by the arms 9 the. latter, together with the link, are re- Y the link notch to be again moved into engagement. with the catch pin 18. VVh'en the pins 11 then approach the arms 9, said pins will engage the arms and the bowl will be held "from further upsetting movement. This position of the bowl allows a spreading discharge of the material therein to be had. i I

If it is desired that the bowl shall completely upset so as to dump its load all at once, the pullingpressure on the cable 28 is maintained, so that the member 24: is heldraised and the notch in the link cannot reengage' the pin '18. Then when the pins 11 reach the arms 9, they can depress and pass by said arms, of course permitting unrestricted upsetting movement of the bowl.

From'the foregoing description it will be readilyiseen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While. this specification sets forth in detail the present and preferred 'construc tion of the device, still .in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what ll claim as new and useful. and desire to secure by Letters Patent is:

1. A scraper including a pivotally mounted bowl, means. including an adjustable lever for controlling the scraping position of the bowl, and means independent of the lever but rele'asably connected therewith to normally prevent rotation of the-bowl, but which, upon being released from engagement with tie lever, will allow the bowl to rotate independently of the set position fixed by the lever.

2. A scraper including a pivotally mounted bowl, an adjustable lever, a linkreleasably connected thereto and normally movable therewith, means between the link and bowl to hold the latter in scraping position IX? when the link is connected to the lever, and. means for releasing the link from the lever whereupon the bowl will be free to more on its-pivot to dumping position.

3. A scraper including a. frame, a bowl -p1votally mounted thereon, an adjustable lever, a link releasably connected thereto, and normally movable therewith, release means for the link mounted on the lever, and means between the link and bowl whereby the scraping position of the bowl is controlled by movement of the link with the lever while the bowl is-free to move to a dumping position when the link is released.

4:. A. scraper including aframe, a bowl lilt) pivotally mounted thereon, an adjustable lever, a link; releasably connected thereto,

' and .normally movable therewith, means between .the link and bowl whereby the bowl may be adjustably positioned and is held immovable relative to the frame when the link is connected to the lever and is free to move to a dumping position when said link is released, and means for releasing the link operable irrespective of the set-ting of the lever and link.

5. A scraper including a pivotally mounted bowl, a projecting stop pin on the bowl ahead of its pivotal connection with the frame,-a pivoted arm normally projecting under and engaging the pin, and adjustable means including a hand operated lever separate from but releasably connected with the arm for normally holding said arm rigid but permitting ofits controlled movement aboutnits' pivot when released from the lever. 6. A structure as in claim 5,-in which means, operating independent of the lever,

is provided for freeing said armto enable the rotative tendency of the bowl had with the forward movement of the frame to cause the pin to .depress and move past the -arm.

7. Ascraper including a frame, a bowl pivotally mounted thereon, an adjustable lever, a pin projecting from the bowl paral- -lel to and ahead of its pivotal connection with the frame, an arm normally rojecting under and engaging the pin, a s aft turn ably mounted in the. frame and onwhich -said arm is fixed, another arm projecting from and afiixed to said shaft, a link extending from said other arm, releasable catch means between the link and lever normally holding the two in driving engagement, and a trip structure operable at will for releasing the link from the lever. 8. A structure as in claim 7, in which means is provided for enabling the lever to be maintained immovable in any position, and spring meansacts on the link to tend to maintain the same in engaged relationship with the lever.

9..A scraper including a frame, a bow pivotally mounted thereon, an adjustable l'ever, a pin projecting from the bowl paral- 'lel to and ahead of its pivotal connection 4 with the frame,-an.arm normally projecting under and engaging the pin, a shaft turnably mounted in the frame and on which said arm is-fixed, another arm projecting 'from; and aflixed to said shaft, a link ex-.

ture.

catch means between the'link and lever normally holding the two in driving engagement, a trip structure operable at will for releasingjthe link from the lever, whereby the arm is then .free' to be turned by the pressure of the pin thereagainst to enable said pin to pass by the arm, and spring means acting on said arm to restore the arm to its normal position. v

10. A structure as in claim 9, in which additional spring means acts on the link to then cause said link ,to resume its driving engagement with the lever. I 11. A scraper including a mounted bowl, stop pins on the bowl, a shaft turnable adjacent the bowl, means normally preventing rotation of the shaft,

arms on the shaft normally engaging the stops to--prevent rotation of the bowl, and

torelease the shaft to allow it to rotate, whereupon with the forward movement of the bowl the stop-pins will act against the arms to rotate the shaft and carry the arms out of engagement with the stop pins and allow the bowl" to rotate, and means to then return the shaft to normal position.

13. A scraper including a pivotally mounted bowl, stop pins on the bowl, a shaft turnable adjacent the bowl, means normally preventing rotation of the shaft, arms on the shaft normally engaging the stops to prevent rotation of the bowl, means to release the shaft to allow it to rotate,

whereupon with the forward movement of the bowl the stoppins will act against the pivotallytending from said other arm, releasable arms to rotate the shaft and carrythe arms out of engagement with the stop pins and allow the bowl to rotate, and means to then return the shaft to normal position, such means including a projecting arm on the shaft and a yieldable* element interposed between the arm and the scraper frame.

In testimony "whereof I- affix my signa- DAMON n.- 'rnnoor

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