Sidewalk and curb edger



H. PETERSEN SIDEWALK AND CURB EDGER March 15, 1960 2 Sheets-Sheet l Filed March 14, 1958 FIG. vine, rivw. 4 INVENTOR. frEes-M HEOL March 15, 1960 H. PETERSEN 2,928,479 sIDEwALK AND CURB EDGER Filed March 14, 1958 2 Sheets-Sheet 2 FIG. 3. FVG. 4 I NVEN TOR. H4e00 A57-@5514 P//W/wwmm u 29M@ ,arme/Veys. 2,928,479 v SIDEWALK AND CURB EDGER Harold Petersen, Denton, Tex. Application March 14, 1958, Serial No. 721,529 9 Claims. (Cl. 172-16) This invention relates to improvements in rotary blade' edgers for edging lawns along sidewalks and curbs, and more particularly to an improved hand-guided motordriven device of this kind having a single curb or sidesimple and easily assembled parts, and can be manufactured at relatively lo-w cost, and wherein the guide plate prevents contact of the rotor with an edge of a curb or sidewalk along which the device is moved. Other important objects and advantageous features of the invention will be apparent from the following descrip`v tion and the accompanying drawings, wherein, for purposes of illustration only, a specic form of the invention is set forth in detail. In the drawings: v Figure l is a top plan view of a device of the invention; Figure 2 is a right hand side elevation thereof, in relation to a curb or sidewalk; Figure 3 is an enlarged fragmentary vertical longitudinal section taken on the line 3-'3 of Figure 1; and Figure 4 is an enlarged vertical transverse section taken on the line 4 4 of Figure 2. Referring in detail to the drawings, wherein like numerals designate like parts throughout the several views, the illustrated device, generally designated 10, comprises a longitudinally elongated, horizontal U-shaped frame 12, preferably made of a single length of metal tubing, and having a front end bight portion 14, a rst straight side member 16, a second side member 18 having a short forward portion 20, and a long straight rear portion22, both parallel to the first side member 16, with the rear portion 22 spaced from the first member 1-6 at a greater distance than the forward portion 20. The iirst and second side members 16 and 18 terminate at their rearward ends in upwardly and rearwardly inclined, diverging handles 24, which are spaced and connected by a cross bar 26. On a level only slightly above the side members 16 and 18, horizontal bolts 28 traverse the handles 24 and the upper ends of the vertical arms 30 of a U-shaped stand or rest 32,1whose bight portion 34 is normally on a level below the side members 16 and 18,'and is'adapted to rest upon the upper surface -36 of a sidewalk or curb 38, with the frame 12 tilted rearwardly, so as to support the device 10 while not being used in an edging operation. The stand 32 swings freely on the pivot bolts 28. ` Secured, as by weldings 40, to the inner side of a rear part of the frame side member 16 and to the inner side of the rear portion 22 of the frame side member 18 is a U-shaped cross section motor mounting base 42, having a depressed bottom Wall 44 having a free forward edge-46. Fixed to the underside of the bottom wall 44 at a point between the rear and front edges of the motor base 42 and slightly offset toward the frame side member 16 is a bracket 48 journaling a single preferably solid rubber curb or sidewalk-engaging'wheel 50. Secured upon the motor base 42 at the center of gravty of the device 10 is a suitable motor- 52, such as a gaso-V line engine, having a drive shaft 54 reaching laterally outwardly over and beyond the frame side member 16 and having thereon a V-belt pulley 56, over which is trained an endless V-belt S8. Secured, in suitable manner, as shown in Figure 4, to the underside of the motor base bottom wall 44 at'the forward edge 46 thereof is a transverse horizontal bear-v ing sleeve 60, which reaches between a central n otch 62 in the forward edg.A 46 to a point slightly beyond the frame side member 16, and in which are secured bearings 64 and 66. A rotary eccentric shaft V68 is journaled through the bearings 64 and 66 and has a belt pulley 70 on its outer end, and has journaled thereon within-the notch 62 an eccentric sleeve 72. Secured on kthe inward the collar 74. lournaled on the eccentric sleeve 72 is a journal bracket 76 having a forwardly declining arm 78 to which iS bolted, as indicated at 80, the elevated rear end of a forwardly declining lo-ngitudinally elongated spring plate 82, which terminates at its lower end in a horizontal, for-Y wardly extending shoe plate 8-4 of triangular shape. The shoe plate 84 as seen in Figures Vl and 2, has a beveled forward cutting point 86 and a beveled side cutting edge 88 which faces toward the frame side member 18. Bolted, as indicated at 90, upon the forward depressed end of the plate 82, is the lo-werend of a rearwardly inclined brace bar 92, whose upper end is bolted, as indicated at 94, to spaced points of aplate 96 on the underside of a journal bracket 98. v At points spaced forwardly from the eccentric shaft 72, journal brackets 98 and 100 are fixed on and depend from a forward part of the frame side member 16 and the forward portion 20 of the frame side member 18, Vin which are journaled related end portions of a transverse rotor shaft 106 having thereon a pulley 108 in line with the pulleys 56 and 70, and over which the belt 58 is. trained. A thrust and spacer collar 110 is secured on the rotor lar 110, as by bolts 116, and circumposed Yon. the.- shaft 106, an edging rotor, which is generally'designated 118, and which works along the side of the declining plateV 82 facing the frame side member 18 and adjacent to the cutting edge 88 of the shoe plate 84. The rotor 118 comprises a diametrically elongated` plate having a central portion secured to the block 112Y and defining two elongated rectangular blades 120 having bevelled cutting edges 122 on their radially outward ends. ,v t A preferably cylindrical housing 124, which is fixed at one end to the bearing bracket 98 and has its vother end closed to the rotor 118, is circumposed on the rotor` shaft 106 and has a lixedly circumposed thereon the journal bracket 98, so that the housing 124 constitutes Ya pivotand stabilizer for the shoe assembly 126 which includes the plate 82, the shoe plate 84, and a guideplaten 134, during vertical .oscillation of theassembly 126 incidental to operation of the motor 52. A quarter circular grass deector arm 128 is secured lateritedlMar. 15, w tspear endA upon `motor `basenbottomluwiall 44l near its Y 3, and extends forwardly abbfve and over the rotor 118. forward edge 46,1 asY shown in Figure'sfZ afdfr flagrant@ with-the H1010?. illumina-.andi the hanf-.sf plates?! @at- 1199K sidewalk 38,11. andY 'with the 4singlewheel Striding' upon. the surface 36, 'at thexside edgep37 ofjthe curbyorrlsidel-d wallgn `38,1inwline with the wheel as shown inlFigureA, the lebla'desglztlgof therotor 118are positionedg'to workAV .iframe ,1.2 -raf-gelierllv .thofini Y as showa m1 Figure 2,50. asien-apply thesh; e Aup'pensurface 36 of a; curb orV alongside of the ledge 37 ,l and the cutting ends 122,;oi thefY rotgnbladfs cutstoga level below the surface 36,- andi therebysever,s od1132 close to the'side edge V37. i As the A device 10 is moved uforwardlyalongpthe curb(orgside-V downwardly lrelativegto the,` device 10, sothat theesod;` 'n 3 advance of therotor 118x and; the rotor blades 1-20 vhave `a `sod-cutting action which:l combines l tljegotation;` of the e rotor with verticaloscilla-vY having A'of the;` rotonand liartingtk alongitudinal1ycurved sod,- cutting lower edgeA spaced below; saidrotr', said rotor comprisin-g adiarriet-r-idally elongatedfplate having a central portion vand elongated blades extending therefrom and having sod-cutting ends. o 5. Anedger according to claim l, wherein a motor j mounting-baseVislsecured acrossfsaicl` frame attthe rear ofithen Shoe platell-tends Vtornoversod toward the rotor:- i' 118,.-"Asshowngin Figure 4, the side cutting.` edge 88 of, crescent-shaped, longitudinally elongated vertical,planevr guide` plateg-llwhich is secured along and dependsgfrorn--, .i t thefnflsp'ring` plate 82; wat the edge thereof adjacent to the; rotor 118.` The lguide plate 134 has a curved and'beyf"` elled.-,low1et cutting edge136 which, extends `below the slibeijplatei and below; the rotor 118. The -guide plate 1341is arranged to `berkept sliding along the curbside] edge 37A as thedevice is moved ralong vthe curb; so jthat t the'fdevice ,10 is accurately guided along "the curbf with@ therotor-IIS;safelyjspaced therefrom and euttingfinto, thegdd1132fso as to' form 'a sod Ve'dge 138 which is clearly:` anduniformlyvspaced'from th'el curb side edge37r VObmfiuntinaibasc" elcureda acwssajid frame; a? the reati end-f-theljeof` n as"` l a4 bottomswallz; saidmotor lmeans T. being secured upon vfthe'lmounting` base?, said.A eccentric. mg A .shapedgand gliavuingjz spaced side members Ybet'ween i vvhicil'isaid motor-1 mounting-` base extends,- said rrotor havside members., ing;1 arotoiyshaft.extendingrbetween andjournaledon said mountingzbase-lis: secured across said Vframe .at the real;V viouslyytheycontact vof the guide plate 134%witl'lutheg` Y i i ing a rotor` "shaft extending.betweenA and journaled 4on said 5 curb` side".edge 37 precludes injurious contact ofthe rotollwwith `the curb 38;` While t there phasy been shown and Vdescribed-1liereina'` preferred formiof-.theinventiomit` is taba-understood i that the invention is not necessarily confined theretofanda dias-'any change or changes in the-structureofY andin therehlative arrangements of components thereof are-convtemplated-Eas beingtwithin the' scope' of the invention'wtas@ having forward and rear endst upstanding handle means` on'the rear end of the frame, a'sin'gle curb-engaging wheel onland dependingifromsaid frame-,at `therea'r end thereof; transverse horizontal axisV vertical planeafsodV t cutting rotor journaled onthefrarne at the forwardiendff being mounted on. thebasejgbottoin`V` walk-saidyframej-l beinggeU shaped andV havingzspaccdgside member-s between vwhich; said ,motorf mounting base` fextends; f saidrotor.- havf, '4 wardI efmera-transverse.'horizontal. axist vertical plane sod cutting rotor journaled on the frame/eat. the forward end` thereof; arsiioer` assemhly;,ir'icludingf .a horizontal shoe ward endwadhaving aj `horizontal .shoe"p1ate' arranged. toslide along a curb -topzat a curb side'edgea'nd a vertical `plate tofrslidealongtarcurb Vside. edge astthe edger is moved along a curbadjacent sod, an'eccentric jour:V n'aled .con -thefr'ame-b'ehindgsaid rotor; means'connetirig"'the eccentric'to said assembly fort-oscillatory move-ii' ment of said-assembly about the horizontal transverse' axis relativelto the frame and the rotor, ndtmotor means mounted onA said frame and operatively connected toffthe:Y eccentric andV to the rotor. 4 g Y f 'Y edgemdisposedain.cooperativexelaton with respect to rLuAnziedger comprisingv a generally horizontal frame, said rotor and pivoted on said. frameon la` horizontal transverse-axis), afotary shaft?, an `eccentric on saidshaft, and means connecting the eccentrictotsaidassembly `for` oscillator-yf.movement` of? said; assemblyabout the ,hori-L ztalgjtrans'verseQ-,ac'islrelative to ,said rotor.` 1 Ant dgencomprisingfa mobilegfamefhavinga for-z wrdeiid; aftransverse'horizontal.axisfvertical plane sod cutting; rotorfjdurnaled-on .the frame l atrthe fforward endV arrangedtslide alongztafcu'rb topi` ata curbside edge aridlafvertical platefto slide along ,a curb side edge as the ledger: lismoifed i alonga curb4 adjacent sod disposed in-cooperativel relatioxwithlrespectato. said rotor and pivoted-on" said `frame ony "a" Ihorizontalv transverse axis,- atta'ryfshaft; an eccentric oi'rsaidshaft',V and means con- 2"; An edger according to claim 1, wherein said shoe assembly coni'prisesfa rearwardly inclined spi'ing'plate*` havingajournal on its elevated rea'rend circumpose'don'gisaidueccentri,"saidrshoe 'plate being; secured toffand" depending from `said 'spring 'plate' along 'an adjacents'idelVV ofthe-rotor; i 3'; edger accordingto ela 1,... wherein;- said sbozi lleferencs Citedtintheleof this patent "Newmi



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Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    US-1238595-AAugust 28, 1917Gunnar T SundholmLawn-trimmer.
    US-1644068-AOctober 04, 1927David A McbrideLawn-grooving machine
    US-2624938-AJanuary 13, 1953Freeman H DavisGrass edge cutter
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Cited By (7)

    Publication numberPublication dateAssigneeTitle
    US-3144084-AAugust 11, 1964Albert L SmithLawn edge trimmer
    US-3429377-AFebruary 25, 1969John F Nunes JrSod harvesting apparatus
    US-5119879-AJune 09, 1992Kawasaki Jukigyo Kabushiki KaishaEdger with tubular main frame
    US-6457267-B1October 01, 2002Roger D. Porter, Jerome C. BurroughsTrenching and edging system
    US-6651361-B1November 25, 2003Roger D. Porter, Jerome C. BurroughsCompact machine for trenching and for installing cable, wire, tubing, and the like
    US-6874581-B1April 05, 2005Compact bed edging machine
    US-7096970-B1August 29, 2006Porter Roger D, Burroughs Jerome CCompact bed edging machine