US1845349A

US1845349A - Hydraulic control apparatus for scrapers

Info

Publication number: US1845349A
Application number: US398685A
Authority: US
Inventors: Mclennen C Slate
Original assignee: SLATE CONSTRUCTION Co
Current assignee: SLATE CONSTRUCTION Co
Priority date: 1929-10-10
Filing date: 1929-10-10
Publication date: 1932-02-16
Anticipated expiration: 1949-02-16

Description

Feb. 16, 193.2v

MCLENNEN C. SLATE HYDRULIC CONTROL APPARATUS FOR SCRAPERS Original Filed Oct. 10, 1929 B'Sheets-Sheet l ma .N1

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Feb. 16, 1932 MCLENNEN c. sLATE HYDRAULIC CONTROL APPARATUS FOR SCRAPERS original Filed Oct. 10, 1929 3 Sheets-Sheet 2 SE? E NQN N Nunn.

Feb. 16, 1932. QMCLENNEN c. SLATE AHYDRAULIC CONTROL-APPARATUS FOR SCRAPERS m mw@ Q m V [L w AQ original Filed ojt. .10, 1929 hereinafter described.

fifi' with the piece 3'* Fig. 4 is aytopplan viewof the hydraulic Patented Feb. 16, 1932 Mc'lniinnn c. sLA'rE, or ALBANigoREGoN, nssieuon sLA'rn oonsrnuorioiv -ooM- y PANY, or ALBANY, OREGON 1 f HYDRAULIC ooNrrRoL APPARA'rus Fon sGRAERs Application fried october io, i929, serial rlie object of my invention is to provide af novel hydraulic control apparatus for controliing the operation of a scraperand particularly to positively and automatically con'-l f trol the digging angle of theV scraper and for permitting of such control from a distance as from the seat of the tractor', by means of cords connected with levers arranged to operate valves or other mechanism ofA the hy-l draulic apparatus; and it is an object of my invention to provide a novel combination of elements and the novel means for arranging7V mounting and adjusting the mechanismdisclosed in the accompanying Vdra-wings and I attain these and other objects of my in'` vention by the apparatus illustrated inthe accompanying drawings,in which, Y Figure 1 is a side elevation of my' invention p 14' held in a forward position,

thus causing a tilting of the body of the scraper and the placing of its entire weight upon its cutting blade; 1 Fig. 2 is a side elevation'of the scraper i" in dumping'position and the relative position of the control apparatus when it is in position;

that

Fig. 3' is a side elevation of the scraper in Opening out'of the cylinder 22 is a conduit 28 A normal position for haulingy control apparatus; and 4 Fig.

5 is a side elevation anism broken away and'shown in vertical sec- Lilre numerals of the several views. y n Referring' to the accompanying drawings I provide a suitable scraper body 1` having run-p` ners 2 and a bottoinand. cutting blade 3. I

provide a tongue for the scraper -witha..re

leasable slide member 7 slidabl yrnou'ntedon` the underside of the tongue and to. which the ends (tot a plurality of pulling rods 5 are loosely mounted, the rearends-t of said pull-f y with the trip lever 10 "and may be released so t as to slide on the tongue` byoper'ating that.

y of the hydraulic` control apparatus with portions ofthe incoh-4v designateli-ke partsy in eachJ no. 398385. Renew'ediapary 14, i931.

theV operator.4 I provide an extension orlinlr 9 on the end of `tongue 8, as shown in Fig. `1. Mounted on the tongue 8 is a bracket 12 on which; the hydraulic control'apparatus is mounted by means ofthe pivot connectionl?) as shown in Figs. 1 and 3.

y Ailixed to the rear of the er 'are spaced posts 14 which are lconnected by the pin or'bolt 15 which extends through the slot 17 inthe rear -end of the tongue 8. The

body of the scrapi upperends of the post 14 are provided with i apertures `inwhich thefprojections 16 of the movable piece 2Q are mounted.r4 Thepiece 20 has a bolt-20a extendingvertically through it and thr'oi'igh 'the slots 20o of members 18,

this element functioning toV keep they movable piece in its properslidable relation-'in the slot 19 between the spa-ced plates 18. i

Referring to'Figs;V 1l and 5' there `is illustrated mjy hydraulic apparatus consisting of the cylindersj21 and 22 containing oil or other suitable liquid. VIn the: cylinder 22 is mounte ed* a piston 25 Ywhich is connected by a suitable connecting rod 26 with the spaced arallel plates 18, the connecting rod 26 being s idably mounted in a casing 27 as' shown in Fig. 5.

at the rear end of the cylinder which conduit circles' the cylinder and which also is in coininunication with the forwardv end of cylinder 22 throughithe conduit 33. I provide a check valve'l in pipe 29 and a pipe cross connection 32, as shown in Fig. 4 ;-and a relief valvev 23 which isequipped with a check valve `24g as shown indottedlines in Fig. Ll.' I provide a communicates with the pipel 29 which' en-A relief port 3&1y lconr'iecting cylinderv 22 with 'v 'cylinder 2 1as shown ,in Fig. .5, whichv perff mits the 1c`ylinder'21 to compensate for the spacey oc-V at theorward'endof,cylinder 22.. f Y Va'hn'23l's controlled by a lever 24 which turn'V is operated 'tends to a convenient position within reach oi" the" operator von'l theitractoi' drivers seat. In` operationas,they scraper is dumped, posts 121.automaticallyfI assume the-position y .90* liquidy to llow fromcylinder22 to y cupied b connecting rod 26 when piston 25 is s by a rope 25 which-eX-f y relative to the tongue 8, as shown in F ig. 2. At the same time, this action causes oil that is on the forward side of the piston 25 to pass to the rear of said piston, the oil first passing through conduit' into pipe 29,' past check valve 81 and through conduit 28 to the rear of piston 25. Fig; 5 shows a piston in the position in whichit stands when the scraper is in its normal hauling position. l/Vhen the scraper is in the position shown in Fig. 2, the piston 25 will be moved to the forward end of the cylinder 22. Now if the scraper body 1 is returned to a digging po- Y sition, such kas that shownin Fig. 1, the piston cannot return to the rear end of the cylinder because of entrapped oil in rear portion yof the cylinder 22. A. small portion of oil must pass througha relief port 34, Vcommunieating between cylinder 22 and reservoir 21, as shown in Fig. 5, because when the piston is in the forward end of cylinder 22, connecting rod 26 occupies an appreciable amount of the volume inside the cylinder. f l

AfterY the scraper yhas been filled with earth. by-pass valve 23 is operated bya pull on the rope 25. which actuates the lever 24, which in turn operates the valve 23. The piston will then moveto the rear end of the cyl- The by-pass adjustment cocks 49, 50, 51 and sitions by use ofcord/25.V A

inder and the oil that was previously entrapped behind the piston will pass through the by-pass valve 23, through pipe 29 to the forward end of cylinder 22 andenou gh oil to compensate for the volume of the connecting rod 26 will pass in from they reservoir 21 through the relief port34. This ywill allow the body 1 of the scraper to tilt backward into a hauling position, such as shown in Fig. 3. When the, scraper -is dumped the above described action will again take place.

Referring to Fig. 4, asa means of securing adjustment ofthe apparatus to the desired digging angle, I provide in cylinder 22 a number of outlets 43, 44, 45 and 46 placed at various pointson rear end of the cylinder and connected withJoutlets-47 or 48 on the forward end of the cylinder. Note that near the

outlets

48, 44, 45 `and 46 are placed

cocks

49, 50, 51 and v52. Now if say cock 49 is opened and all others closed it is evidentrthat the piston after being pushed to the forward end of the cylinder can return part way when the scraper is returned to the loading position. N ow, if coclr49V is closedand any one of theothers opened thepiston would travel back tov the corresponding position, thus adjusting-the digging position of the scraper accordingly.

52i-provide a control which Ywill automatically return thescraper toany one ofthe several desired angles without attention of the tractor operator. Also vthe tractor driver can secure an infinite number of digging poto the rear of the scraper, and extending above the top of the scraper, a bracket mounted on the tongue of the scraper, hydraulic apparatus vpivotally connected to said bracket, saidhydraulic apparatusincluding a connectinc, rod having spaced plates attached toit,

a movable Vpiece nriountedy between the plates and having a limited range of movement, saidpiece havingprojections pivotally engaging the upper ends of the posts aiiixed to the rear of the scraper, and means for controlling the operation ofth e hydraulic apparatus from a distance, whereby the digging angle may be controlled from a distance and whereby the machine will automatically be placed in such a position that the loading operation may be commenced at onceV whenever the scraper is returnedfrom a dumping position to a digging position without attention on the part of the tractor operator.

2. In apparatus of the class described, the combination of a scrapenpulling rods pivotally connected with the forward end of the scraper, a tongue on the scraper, a slide member slidably `mounted on the tongue and to which member the pulling rods are operatively connected, means operable at a distance for releasing the slide member, posts atiixed to the rear of the scraper, and extending above the top of the scraper, a bracket mounted on the tongue of the scraper, hydraulic apparatuspivotally connected to said bracket and having an operative connection with the upper -ends of the posts-to limit the angle to which the scraper can be returned from dumping position.

3. In hydraulic apparatus Yfor* tilting a Scraper to a desired digging angle, thecombination of a scraper body. posts affixed to the rear of the scraper, and extending above the top of the scraper, a' tongue having a limited slidable connection with said posts at a point above the scraper but below the upper ends'of the posts,l hydraulic apparatus for limiting the angle to which the scraper can be `returned from dumping position. means for operatively connecting the hydraulic v paratus with the upper ends of the posts, a piston to which said means are attached, a main cylinder in which the'piston is slidably mounted, an auxiliary cylinder with which the main auxiliary cylinder has a fluid connection, vconduits opening out'of opposite ends of the main cylinder, an encircling' pipe with which each of said conduits communicate, check valves in said pipe, and .means fined in claim 6, the combination of an operfor manually operating one of the valves.`

il. In hydraulic apparatus for controlling a scraper, the combination of a scraper body, posts aiii-Xed to the rear of the scraper and eX.- tending above the top of th-e scraper, a tongue having a limited sllidable connection With said posts at a point-between` the top of the scraper and the upper ends of the posts, hydraulic apparatus for vcontrolling the digging angle of the scraper body', a link membei operatively connecting said hydraulic apparatus with the upper ends of the posts, said apparatus including a piston to which said' link member is attached, a main cylinder in which the piston is slid'ably mounted, an auxiliary cylinder, a fluid connection between the main cylinder and the auxiliary cylinder, conduits opening out of opposite ends of the main cylinder, an encircling pipe 'With which each of said conduits communicates, check.`

valves in said pipe, and valve mechanism for controlling the operation oi" theVv abovef'described hydraulic apparatus, said mechanisin being operable froma distance.

5. In combination With the apparatusv de.- fined in claim 3 a reliefI valve mounted inthe pipe which encircles the cylinderr 4 l 6. In an apparatus of the class described,

v the combinati-on `of a scraperV body, posts aflined to the rearof :the scraperbody and extending substantially above the topof the scraper body, a draft device having a slid'- able and pivotal connection With the said t posts at a point spaced substantially fromthe top of the posts, a hydraulic control `alpparatus including a piston, connecting rod, and spaced plates attached to the connecting rod, a movable piece mounted `between said spaced plates and having a pivotal connection with the top of the aforesaidposts, valve mechanism. connected `with the hydraulic apparatus and operable from a distance.

7. In an apparatus of theclass described,

the combination of av scraper body; posts aliixed to the rear of the scraper body lsaid postsl extending substantially above the top of the scraper body i a draft device having a slidable and pivotal connection With-the said posts at a point spaced frointhe topportion thereof; a hydraulic control apparatus including apiston, connecting rod, and spaced plates attached Yto the connecting rod; l a

movable plate mounted between said spaced@` plates and having a pivotal connection vwithl the top of the aforesaid posts, valve mecha'-,

nisin connected with they hydraulic appara-tus` and operable from a distance forv controlling` the operation of the hydraulic apparatusto;L regulate the digging angle of the scraper, an Y operating lever mounted onfthe' draft device and operable from a distance, a slide` member .releasable by said lever, pulling rodsicon.-

nected with said slider member and vvilthlftheAir bottoni forward portion ofthe scraper. f

8'. In combinationwith theapparatus ydeating" lever vmounted on the tongue of the scraper and operable from a distance,v a slide member releasa-ble by said lever, pulling rods connected .with said member and With the bottom forward portionof the scraper. 1

9;, In an apparatus of theclass described,-

the combination of ya scraper body, posts aflixed to the rearv of the scraper and extending considerably above the top of the scraper, a tongue connected with said posts'and also Witli the forward portion ofthelbody'of the scraper for tilting the scraper, and a hydraulic apparatus operatively mounted on the tongue and operatively connected with the upper ends of the fposts and means oper- 'able from fa. distance for-controlling the hydraulic apparatusy whereby to regulate V and control: the operative 'position of the scraper` and its digging angle.

10.V In'an apparatusiof the class described,

the'coinbination ofascraper body,posts affixed tothe rear of the scraper yandfertending considerably above the top. of thev scraper, a tongue connected With said posts and also with the forward portion of the body ofthe scraper for tilting Vthe scraper, and a hydraulicV apparatus operatively mounted on the tongue and operatively .connected with the upper ends of theposts, the hydraulic apparatus-being arrangedand ladapted for Yautomatically and positively controlling' the extending above same and to which the 'hydraulic apparatus is connected said hydraulic apparatus including means for automatically regulatingv and 'limiting the return movement from digging lposition of the body of the apparatus to its lhauling position'ivith-l out the attention of the operator.

l2. In apparatus of the class described,

the combination of a tongue, a hydraulic control unit mounted onthe tongue, posts a'ixed to the scraper body andk extendingl above same and tovvhichthe hydraulic apparatus jis'connected said hydraulic apparatu'sin:

cluding means for automatically limitingtlie return-'movement of the apparatus from-digging to hauling position Without the attention of the]operator, saidfhydraulic control unit includingpipes having by-pass` adj ustment cocks arranged to automaticallyY return the scrapertoany one ofseveral desired` angles Without attent-ion ofthe tractor operator, and' cords connecting With operating f levers whereby the tractor driver can control-the apparatus from a distance andsecure an infinite number of digging positions by operating the cords.

13. In an apparatus of the character described, vthe combination with a scraper body7 of apost arranged adjacent the'rear of said Sora-per, a draft device connected with said post and with the forward portion Vof the scraper for tilting the scraper, a hydraulic apparatus mounted on the draft device and operatively connected with the post, and means to control the hydraulic apparatus to regulate the operative ydigging angle of the scraper.v i

Y lit. In ari-apparatus of the character described, the combination with a scraper body,

Y of a draft deviceconnected with the scraper body adjacent the rear thereof,.means connecting the draft-devicevwith the forward portion of the scraper, hydraulic apparatus mounted on the draft device and operatively connected to the scraper body, and-means to control'the hydraulic apparatus for regulating' the operative diggingiangle ofthe scraper.

15. Inan. apparatus of the character kdescribed, the combination with a scraper body, of a draft device connected with the scraper body adjacent the rear thereof, means connecting the ldraft device with the forward portion of the scraper body, hydraulic apparatus arranged to allow relative movement between the dra-ft device and scraper body, and means tocontrol the hydraulic apparatus for regulating the operative digging angle of the scraper.

16. In an apparatus of the character described, the combination with a scraper body, of a draft device operatively connected to said scraper body at points spaced longitudinally of the draft device, one of the connections between the scraperbody and draft deice permitting movement of the scraper body relative to the draft device, andhydraulic apparatus arranged tov adjustably limit said relativeV movement. i f 17. In an apparatus of the characterdescribed, the combination with a scraper body, of al draft device'operativelyv connected to Y said scraper body, saidconnection permitting limited sliding movement of the scraper body relative to the draft device, and a hydraulic apparatus associated with said sliding con- K nection to regulate and limit the movement ofthe scraper body relative to'said draft device. Y v Y.

18. In an apparatus ofthe character d escribed, thecombination with a scraper body,

of a dra-ft device operatively connected there- Y with',.said draft connection permitting rela- .'tive movement between the ldraft device and Vthe scraper body, and a hydraulic apparatus associated with said draftconnection to automaticallyV limit relative movement between the scraper body and draft device.

V19. In an apparatus of the character described, the combination with a scraper body, of a draft device operatively connected therewith, said draft connection permitting relative movement between the scraper body and draft device, and a hydraulic apparatus associated with said draft connection to regulate and limit relative movement between the scraper body and draft device, said hydraulic apparatuscomprising a hydraulic cylinder, a piston arranged therein, conduits connected with opposite ends of said cylinder, a conu trol valve operatively associated with said conduits to permit movement of the piston in' said cylinder, and means to permit limited movement'of the piston in the cylinder independently of the control valve.

20. In an apparatus of the character described, the combination with a scraper body of a draft device operatively connected therewith, saiddraft connection permitting relative. movement between the scraper body and draft device, and a hydraulic apparatus associated with said draft connection to regulate and limit relative movement between the scraper body and draft device, said hydraulic apparatus vcomprising a piston and a hydraulic cylinder therefor, said pistonV and cylinder being connected to said scraper body and draft device, conduits connected with opposite ends of the hydraulic cylinder, a control valve operatively associated with said conduits topermit movement of the piston in said cylinder, anda plurality of spaced relief valves associated with said cylinder to permit limited movement of the piston in the cylinder independently of the control valve.

2l. In anY apparatus of the class described, the combination with a scraper body, of a post connected to said scraper body adjacent the rear thereof and extending thereabove, a draft device having' a sliding connection with said post, a bracket on said draft device, a hydraulic cylinder secured to said bracket, a piston arranged in said cylinder and pivotally connected to said post, and fluid conduits connected with said cylinder.

22. In an apparatus of the character described, the combination with a scraper body, of a post extending thereabove adjacent the rear thereof, a draft device slidably connected withsaid post at apoint spaced from its top, a hydraulic apparatus connecting the draft device with the post at ai point spaced above thev slidable connection for limiting sliding movement between the draft device andthe scraper body, and a releasable connection between the front of the scraper .body and lthe draft device. y

23. In an apparatus of the character described, the combination withV av scraper member, of a draft member having a sliding connection with the scrapermember, a hy-F draulic cylinder connected to one of said members, a piston arranged inA saidcylinder and connected to the other of said members,

and means to limit the movement ofthe piston in the cylinder to limit relative movement between the scraper and draft device.

24. In an apparatusof thecharacter described, the combination with a scraperbody,

of a draft device operatively connected tothc scraper body adjacent the forward end thereof, and hydraulic apparatus lconnecting `the draft device with the rearward portion ofr the scraper body and arranged to allow relative movement between the scraper body an draft device. f

25. In an apparatus of the character described, the combination with a scraper body, of a draft device operatively associatedwith the front portion of the scraper body, an upstanding member secured to the scraper body adjacent the rear thereof, and a hydraulic apparatus connecting the upstanding member with the draft device and adapted to allow relative movement between the draft device and scraper body.

26. In an apparatus Yof the 'character described, the combination witha scraper box, j

of a draft device operatively connected with the forward portion of the scraper box, and a hydraulic apparatus operatively connecting the draft device with they scraper box and arranged to allow relativemovement beif tween the scraper box and draftV device duri ing the digging, hauling and dumping operations of the scraper box.

27 In an apparatus of the character described, the combination with a scraper box, of a draft device pivotally connected to the forward portion thereof, and a hydraulic apparatus operatively connecting the draft device withthe scraper box and arranged to allow relative movement between the scraper box and draft device during lthe digging, .Y

hauling and dumping operations of the scraper box.

28. In an apparatus of the character described, the combination with a scraper body, of a draft device pivotally connected to the forward portion of the scraper body, a hydraulic cylinder pivotally connected to the draft device, and a piston arrangedjin said cylinder and pivotally connected adjacent the rear of said scraper body toy allow relative movement between the scraper body and draft device.

MCLENNEN c. sLArE.