US2609620A - Grade striker - Google Patents

Description

p 9, 2 A. w. GARDNER ET AL 2,609,620

GRADE STRIKER Filed Jan. so, 1946 2 Sl-lEETS-SI-IEET 1' I I Adry/ W Gardner Palmer Muck/off INVENTOYI'RS Sept. 9, 1952 A. w. GARDNER ET AL 2,609, 2

GRADE STRIKER Filed Jan. 50, 1946 2 SHEETSSHEET 2 Adr/Z N ardn'r Palmer Muskie gr INVENTORS /2 Patented Sept. 9, 1952 STATES PATENT oFFieE lands, Calif ass'i'gn'ors to Gardner-Byrne Coh v I struetion Company, Redlztn'ds, Califl, a, part nership implication Januar '30, 1946, seems. 644,293 '11 claims. (o1. s7---10s-)' This iirifeihtioh is a grade striker r rfsur fatm'g soil, subgrade and other surfacing material and methodof o eration. The present day requiremehts of lot: ahd wide runways for a rplane takeoff, xt efisive are ags'for 'air'plane landing m'ats, wide' ro'aidweys and other areas or surfacing material, neoess'it'et 'irieiohihes operating on a large area at one run or hi'achine over such surface. Hence this maehirie is developed to work a, wide swath of surfacing me'teri'tl "at each run over the area, to be worked, v I

Ill pr'permgths large areas oi ground-now see-a for the shore mentioned purposes, a comman praeti'ce is to cut and fill by use of earth moving equipment of large eapacity, with pulldoz'er's, strapseto, to work thefsurfac'e to a rough grade. Engineers find: surveyors set lines of states in rows marking the grade desired. In 'eii'pla'ne fields of large are'aprovision must be made for water ruhofi and drainage and there must be no abrupt change in slope, which might advfer'sely effect. airplanes i1 takeoff or landing.

The gjrlid'e stakes setbythe engineers may be in rows 25 feet apart each marked to desired grade and the-stakes ma be 20 to 30 feet apart in the rows, With ebulldoz'er orrjscraper a sinuous or serpeiit'irie path is figra'ded twistin'g on one'side and men on the other or thessquence of stakes. This produces the approximate grade adjacent to the row of stakesh nd on both sides of each'row. The Wide space between the narrow path'al'ong the hire or stakes is left very irregular as to soil surfaoing materifaie nd contour. 2 p

v For roit'js of stekesfldfe'et apart the present mtohine spans 23 feet 1111' Vega-ch 'ruh. \The g a e striker employs self riyeh vehicle from which is suspended a transverse bridge. or truss, iram'e: and on the outer en s of the bridge are runf 'er's oifshoes wl ii e h'rest upori tifild slide on the gr ase alon the line of stme {The bridge ear"- :ries from the bottom cord series of strikerjscrap 'er bladesfivhih @rg m ssed with "plow-dike diverging blades dt theoer'iter line. A set of diyrgihg blades strikes the suriaoe material out thirdly from the entr line and adjacent the shoes or,sl;ids are blades sweeping material inweirdly. The striker blades shift the surface ma; terial above m gma-eline latera llyrfillihgfthe lowfs'pots and for ga series of smell windrows or lirles of piled up s rftoe materiel. Thebottom cord of the bridge 21150 has displaeeable material pusher drifter blades set in iront or the dia'gor'lal striker pisses. These drifter blalds may be turned, tow, rqly outer dri'itihg position when the meefi fie fu bt ofis to tfike the surface material 'sidewise. 'Wn'ehjtne, drifter blades are turned down they eng'p'e the fniete'riel or the 'wihdrows ens drift this lengthw se the zha'chifieruh. This ejction c'afus'es deposit 0 more material in the low spots 5 he mul tes the surplus material in transverse messes for f'iemoval by scrapers ortrucks,

An important feat re or thejinynitio' the adjustable connection between the skid shoes o d the bridge with its striker and drifter blejde's. Thisconnectio or; e'eoh side is powe operated to u te t th. or t of h was. one bridgeskid sn e anq blade'shr'e obignegtedt the vehiele to prev-mes front endpull o the as emb T .Ys i s ii q 'f ms d l w r n t e m so?! til su h .s end sidewise either w'ay Ilhe bride" I and bl es a @Q fii may ai and lowere or tilted sidewise toeither si e o f the y' ehiole.

t s 'r s l 'lsv lin For we provided forthe rik ah .e 18- So me the e si e T tak at n sid to ly rash ar afr i ir nemni trips of the str er tb surr' c'e, the fheteriell, there is a stersi slope to hfwor I d, 'speci'fi f tions of slope are, g ven 'tl'rehi hihe o'pr or; The procedureusuelly is to set the skid sh travel on the jgradfed surfae'e along the l' stake's ejrid byjth'e sid inclinttion'giel'eth it" shoe is set to rideonthe fg'rouiid surf o'e, heno'e thebridge withgits bladesfadj desiredcross slope. This 'd smpemaychange gradually in a 1o g msejn n, ent the ige is positioned for may iri'spectiohb'y the opera tOi. t

e h ds aeratin i e ee eiw preset grade the surface material is swept side We tiqnfi h dess zadius e y the position of the skidfshoes thereby depositing material; in low spots or forming a series of windro'w's with the surface material. Then the run or part of the same is again traversed by the in'chine with the pusher blades in oper'tiye' positiofi. This develops d rollingand substmtielly uiu'rqrm lfat eral spread (if the pushed n'itfiahbusir'i deposit in low spots and cross mounds of surplus material. These monies r'rn'oyd' by eon- Fig. 2 is a plan taken in the direction of the arrow 2 of Fig. 1 detail parts being omitted.

Fig. 3 is a broken front elevation on the lines 3-3 of Fig. 2, detail parts being omitted.

Fig. 4 is an enlarged side elevation of one skid shoe taken in the direction of arrow 4 of Fig. 5, remote parts being omitted.

Fig. 5 is a vertical section on the line 5-5 of Fig. 4.

Fig. 6 is an elevation of the front and taken in direction of arrow 6 of Fig. 7, remote parts being omitted.

Fig. '7 is a vertical section on line '|'I of Fig. 6 in the direction of the arrows.

Fig. 8 is a vertical section on line 8-8 of Fig. 6 in the direction of arrows.

Fig. 9 is a longitudinal vertical section of the bridge and striker blade assembly, parts being omitted, on line 5-4! of Fig. 10, in direction of arrows.

Fig. 10 'is an elevationtaken in direction of arrow ll! of Fig. 9.

Fig. 11 is a detail front elevation taken in direction of arrow of Fig. 12 of the mounting of drifter and striker blades.

Fig. 12 is a vertical longitudinal section on line |2|2 of Fig. 11.

Fig. 13 is a partial elevation similar to Fig. 1 illustrating wheels substituted for sliding skid shoes.

In the general views of the machine of Fig. 1, 2, and 3 part of the supporting, moving and power supply vehicle is indicated byassembly 25, showing one pair of a set of driving wheels and steering wheels 21. An elongated part of the chassis 28 of substantial construction connects the axle of the front wheels fland the main part of the vehicle 29, being conventional has the power plant, drive to wheels 26 and most of the control devices. A pair of separately acting longitudinal lever beams are carried by aligned transverse fulcrums 3| on the forward end of chassis 28 and the rear ends are raised and lowered by a jack 32 connected to chassis 28. Lever beams 30 are pivoted at their forward ends to a front transverse pulling and tilting. bar 33.

Bar 33, note details Figs. 6, '7, and 8, has a central part'34 square in cross section and is connected with thebeams 30 by pintles in the ends of the cross beam. 'A central longitudinal gusset plate 35 has a square bearing opening 31 rounded at the edges, which bearing forms a central bearing for transverse bar 33 and lugs 38 on the bar prevent endwise slippage. Attached to the front edge of the gusset plate 35 is a front end plate 40 which is parallel to the bar 33. A flat top plate 4| is attached to both the gusset plate 35 and end plate 40.

Two pulling beams are'secured at their front ends 46 to both the-end plate 40 and top plate 4| and thus have a pulling connection to bar 33 and lever beams 30. A lifting and lowering jack 55 is attached to the rear portion of each beam 45 and such jack is power operated under control of the operator. 'The jack is a conventional type asused on earth moving machines. V

A transverse, bridge or truss assembly 55, note Figs. 1, 2, and 3, and detail Figs. 9, 10, is hung by hangers 56 from the rear portion of pulling beams 45. The bridge may consist of an upper chord 51, a lower chord 58, strut 59 and brace bars 60-: Shims 6| are fitted between the strut 'and lower chord and conventional steel shapesmay be used to form the bridge. When the shims are removed, the bottom cord may be slightly arched upwardly and substitute shims used when it is desired to grade strike to a camber. For large area working the bottom cord is usually straight.

The skid shoe assembly 10, note Figs. 1, 2 and 3 and detail Figs. .4, and 5, of which there is one on each side, has two vertical longitudinal side plates shown connected at the bottom by a channel 12, and bottom plates 73, to which are attached wear plates 14. An eccentric pin connects the two side plates 1| and functions in adjusting the riding relation of the skid shoes and bridge.

'Each lateral end of the bridge 55 terminates in a longitudinal shoe guide beam riding between the side plates H of the shoe and a boxlike bearing structure 8| extends upwardly from beam 80. This box 8| has a circular bearing opening 82, the center of which is 01f center in relation to eccentric pin 15. A cylinder 83 is journaled in the bearing opening 82 and rotates on'pin 15- and has a rotation arm 84 attached thereto illustrated located between the side plates H of the shoe. A jack assembly 85 is indicated with a hydraulic cylinder 85 pivotally connected to guide beam 80 and having a piston rod 81 pin connected to arm 84. Control hydraulic pipes etc. lead from the cylinder of the jack to the vehicle for using its power.

As the bearings 82 are preferably in the transverse center line of the bridge the rotation of the bearing cylinder 83 in relation to eccentric pin 15 will raise or lower the skid shoe 10 relative to the bridge.

The striker bladeassembly 90, note general Figure 1, 2, 3 and'detail Figs. 9, 10, 11 and 12 is indicated as having a central material diverting plow 9| (note Fig. 2), a series of blocks 92 for spreading material sidewise, one pair of blades 92 have'rearward extensions 93 to form windrows outside the vehicle drive wheels 26 and converging blades 94 adjacent the skid shoes. The striker blades are indicated bolted to angles 95 attached'to the bottom chord 5B of .the'bridge.

Drifter blades "9! are located across the lower edge of the bridge and forward of the leading. edges of the striker blades and are indicated as.

turnable on pintles 98 on brackets 99 onthe bot-. tom chord of the bridge. The pusher blades are in several sections so that the operator may rotate them from inoperative raised position to lowered material drifting position. The drifter blades 97, when in operative drifting position, receivea thrust support from the leading edges of the striker blades 92 as shown inFig. l2.

A lateralslope' gage I05, note general Figs. 2 and 3, is indicated of a fluid level type, having a transverse pipe I05 located in the bridge and parallel to the bottom chord. Risers I01 at each end have sight gages I03 positioned for convenience of observation by the machine operator.

The general manner of operating is substantially as follows: For movement over the. ground without working, the jack 32 may be used to raise the front end of lever beams 30, which hoists the front end of pulling beams 45. The jacks 50 mounted on'the part 28 of chassis can lift the rear ends of beams 45 and hence raise the bridge 55 and its assembly of striker and drifter blades wellabove the ground surface.

Usually the machine is to work the surface be tween two lines of stakes setting the grade .on. both sides of the'machine run and the ground" adjacent the rows ofjstakeshas been graded by.

conventional. equipment.

ul'ated. to bring the skid. shoe win contact. withv the graded line of the stakes and jacksw 85 are used to bring the striker blades to operate onthe desired grade side. slope, if any. weai' plates 1'4" and hence the shoes do not carry all the weight of the bridge 'assembl'y'5'5; but this issupported in part by jacks32. and 50; However, sufficient: pressure is brought on the striker blades to out the surface material above grade, movet'hi's sidewise to deposit in low spots and form a series of windrows of the surplus material.

Should there be low unfilled places the bridge and striker blades may be raised, the 'machine run backward to a section of the run having surplus material in windrows. The blades are again set to grade and the drifter blades brought into operative position, the machine driven forwardly to drift such surplus material over the unfilled areas. While the machine travels the jacks 85 acting on the shoes may be operated to raise the blades slightly above grade to spread the surplus material. The machine may be again backed and striker blades worked over sections of the run requiring considerable fill.

If the cuts are greater than the fills the windrows show the amount of surplus material. The machine then makes a run with the drifter blades shoving such surplus into a succession of cross mounds lengthwise of the run, which mounds may later be removed by" standard equipment.

Should a grade line be adjacent one line of stakes only the shoe on such side is set to grade, then by using the sight gage I95 the bridge is inclined, should there be a, side slope, to the specification and the other shoe adjusted to bear on the unworked surface or be carried above the surface, if desired. The machine then works a run striking the surface material to grade. In the next parallel run one shoe travels on the section just worked. The side slope is maintained by the operator checking the gages I05 by the specification. As the machine traverses its run the side slope may be altered in accordance with the specifications of the job. The jacks 85, which regulate the relation of the shoes and blades, hence may make adjustments as the blades wear. When the wear of the blades becomes excessive, they may be readily removed and replacement blades substituted. In making a run with the skid shoes on one side sliding on the established grade line it sometimes happens there is so much surplus material that the shoe on the other side cannot be lowered to grade but must slide on material having an uneven surface. In such case the bridge and blades may be lowered to the grade line and the operator checking by the sight gage I08 may maintain the correct grade cut and side slope.

When the machine is moved from one job to another the bridge assembly may be disconnected by unbolting the hangers 56 from the pulling beams 45: also the hydraulic connection 'to jacks 85 of the shoe adjustment must be disconnected. The bridge with its associated parts may then be transported by truck: and if the distance from one job to the next is not too great, the vehicle may make the journey under its own power.

An equalizing auger assembly I20 is used with the drifting or bulldozer blades 91 and is located forward of the drifters 91 and transverse of the machine (note Figs. 1, 2 and 3) with the outside ends I2I journaled on the inside of the side plates H of the shoe assembly 10. The auger blades When. the machine. is. lined up for axrun, the jacks 32 and'5li are manip through 'ag'ear box I25 from a main shaft I26,

driven by an engine I21 provided with a clutch and change speed gears, if desired.

The augeris so located as not to interfere with raisin and lowering of the drifting blades 91, and, is operated when these are lowered to drifting position to shift the surplus material from the windrows made. by the striker so for action by the drifters' 91.

Fig... 13 illustrates wheels I30 substituted for channels 12, bottom plates. 13 and wear plates 14.. Wheels I30 are journaled in side plates, II of the shoe assembly Ill andioll on the mineral aggregate.

l. A grade "striker having a vehicle with a longitudinally extending chassis, the vehicle having driving and steering Wheels, longitudinal lever beams -fulcrumed on the forward part of the chassis, a t'ransversebar pivotally connected. to the forward ends of "the lever beams, a rigid transverse structure .pivo'tally connected to said bar. pulling beams rigidly attached to such transverse rigid structure, a transverse bridge having a rigid connection 'to the rear ends of the pulling beams, means interconnecting the vehicle and the lever beams to incline such beams as to the longitudinal direction, means interconnecting the vehicle and the pulling beams to incline such beams as to a longitudinal direction and aggregate means mounted on the bridge.

2. As claimed in claim 1, a shoe on each end of the bridge having means for contacting the subgrade, and means to raise and lower each shoe in reference to the end of the bridge to which it is connected.

3. A grade striker including a vehicle, a bridge extending laterally therefrom, a shoe bearing on the subgrade, an adjustable connection for var ious adjustments between the shoe and the bridge to operate the shoe on a subgrade and maintain the bridge a constant space from such subgrade for any particular adjustment, and material aggregate working means mounted on said bridge.

4. A vehicle, a bridge extending laterally therefrom, striker blades carried by the bridge positioned diagonally as to the forward travel of the vehicle, and a drifter blade mounted on the bridge and movable from a raised to a lowered position to drift aggregate in front of the striker blades, the forward ends of the striker blades being positioned to develop a thrust support to the drifter blade when in lowered drifting posiion.

5. A device as in claim 4 an equalizing auger on the bridge forwardof the drifter blade, with means on the vehicle to rotate the auger.

6. A vehicle having a transverse bridge, with aggregate moving means mounted thereon, a shoe to contact the subgrade, a connection between the bridge and the shoe including an cecentric whereby the shoe may be raised and lowered for various adjustments in reference to the subgracle and the aggregatemoving means and the shoe retained in constant relation each to the other for any particular adjustment.

7. A grade striker including a vehicle, a transverse bridge connected to the vehicle, material aggregate working means on the bridge, a shoe to bear on the subgrade, an adjustable connection between the bridge and the shoe to operate the shoe on the subgrade, means to actuate said adjustable connection While the vehicle is in motion, the shoe contacting the subgrade and the aggregate working means operating on the aggregate.

8. A grade striker including a vehicle, having a station for an operator, a bridge extending laterally from the vehicle, means adjustably connectin the vehicle and the bridge, a shoe to bear on a subgrade, an adjustable connection between the shoe and the bridge to operate the shoe on a subgrade, means under control of the operator while at his station on the vehicle to operate the adjustable connection between the vehicle and the bridge, and to independently operate the adjustable connection between the shoe and the bridge while the vehicle is in motion and material aggregate working means mounted on said bridge.

9. A device as in claim 8 the adjustable con-- bar, pulling beams rigidly attached to said transverse rigid structure, a transverse bridge having a rigid connection to the rear portion of the pulling beams, means interconnecting said chassis and the pulling beams to incline said beams in a longitudinal direction and aggregate moving means mounted on the bridge.

11. A vehicle having a transverse bridge with aggregate moving means mounted thereon, a 1ongitudinal guide beam secured to the bridge, a shoe to contact a subgrade, a rigid structure forming part of the shoe and having part thereof in proximity to opposite sides of said beam to prevent lateral deviation of said shoe from the direction of travel of said beam, means for various adjustments connecting the shoe and the guide beam to raise and lower the shoe relative to the guide beam and bridge.

ADRYL W. GARDNER. PALMER WROCKLOFF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 532,679 Mason Jan. 15, 1395 1,821,843 Lucas Sept. 1, 1931 1,910,120 Mowbray May 23, 1933 1,969,204 Carlson Aug. 7, 1934 2,040,708 Persson May 12', 1936 2,109,393 LeBleu Feb. 22, 1938 2,160,193 Arndt May 30, 1939 2,186,059 Baker Jan. 9, 1940

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