US3446123A - Earth compacting device - Google Patents

Earth compacting device Download PDF

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Publication number
US3446123A
US3446123A US617524A US3446123DA US3446123A US 3446123 A US3446123 A US 3446123A US 617524 A US617524 A US 617524A US 3446123D A US3446123D A US 3446123DA US 3446123 A US3446123 A US 3446123A
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US
United States
Prior art keywords
legs
rotors
edges
earth
hub
Prior art date
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Expired - Lifetime
Application number
US617524A
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English (en)
Inventor
William C Lathers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baldwin Lima Hamilton Corp
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Baldwin Lima Hamilton Corp
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Filing date
Publication date
Application filed by Baldwin Lima Hamilton Corp filed Critical Baldwin Lima Hamilton Corp
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/026—Improving by compacting by rolling with rollers usable only for or specially adapted for soil compaction, e.g. sheepsfoot rollers

Definitions

  • Sheeps-foot rotors are rotatably mounted in annular series on a skeletonized cylinder which is supported for rotation on its own axis.
  • Each sheeps-foot rotor comprises a hub from which sheeps-foot legs radiate, the legs having faces converging to edges facing each other to squeeze out axially dirt which might otherwise be trapped between the legs.
  • a stationary comb has teeth projecting at both sides of each annular series of rotors to engage and discharge such dirt.
  • Rotatable sleeves coaxial with the rotors of one series are immediately proximate the paths of movement of the sheeps-foot ends of the legs of the staggered rotors of the next series, whereby to dislodge radially projecting earth.
  • each rotor provided with at least five, and preferably six, radial legs to perform the sheeps-foot function of compressing the soil traversed by the device.
  • legs it has not heretofore been considered feasible to provide so many legs because of the tendency of some soils to pack between the legs when the angle between them is small. That tendency is obviated in the instant device by so designing the legs that they present sharp edges to each other, such edges being formed by surfaces which, in the instant device, are at an angle of 45 or less to a plane normal to the axis upon which the rotor turns.
  • FIG. 1 is a view in side elevation of an earth compacting device embodying the invention, portions of the supporting frame being broken away.
  • FIG. 2 is a fragmentary plan view looking downwardly and forwardly on the drum mounted rotors of a device embodying the invention.
  • FIG. 3 is a fragmentary detail view taken in axial section through a portion of the drum and rotors of two annular series, parts being broken away.
  • FIG. 4 is an enlarged detail view in perspective of a six leg sheeps-foot rotor.
  • FIG. 5 is a view taken in cross section through two consecutive legs on the line 5-5 of FIG. 4.
  • the device is essentially as shown in my former Patent 3,269,285.
  • a skeletonized drum 8 comprising side rings 10 supported by spokes 12 from a shaft 14 upon which the drum is bodily rotatable.
  • the tie bolts 16 connect together the side members 10 and the intermediate rings 18.
  • the rotors generally designated by reference character 20 (and separately illustrated in FIG. 4) are freely rotatable on tie bolts 16 between the rings 10, 18.
  • the rotors are in staggered annular series. Where the rotors of any given series are absent between rings 18, the latter are spaced by sleeves 22.
  • rollers 24 are mounted to turn freely on the spacers 22. So that they will not bind, the rollers 24 are slightly shorter than the spacing sleeves 22 and are big enough in their central openings 26 to turn freely about the sleeves.
  • the external peripheries 28 of the rollers 24 are sufiiciently large so that as the sheeps-foot rotors 20 turn upon the respective tie bolts 16, the sheeps-foot treads 30 at the ends of their legs 32 pass in close proximity to the rollers 24.
  • Each of the rotors 20 includes a hub 34 having generally radial legs 32, which are not only integral with the hub but preferably merge with each other as shown in FIG. 4.
  • the faces 40 of the several legs 32 converge toward the edges 38 and are desirable at no less than to each other as clearly appears in FIG. 5.
  • the comb teeth 44 are so mounted on the frame 46 as to lie quite closely beside the paths of movement of respective rotors. As the drum rotates on its shaft 14 and the respective rotors turn individually upon the spacing sleeves 24, the comb teeth will tend to dislodge the entrapped earth or to force it radially of the rotors. Any earth which projects radially beyond the tread of one of the rotors will encounter one of the freely rotatable rollers 24 which will complete the dislodgement of the clinging earth and cause it to fall to the ground.
  • a device for tamping compactible material including the combination of a rotatable drum, and sheeps-foot rotors mounted thereon for separate rotation and each comprising a hub having generally radial legs; the improvement which consists in providing the said legs in said combination with forwardly and rearwardly directed edges angularly spaced from correspond ing edges of adjacent legs and with side surfaces which are convergent toward said legs; said surfaces tending to extrude axially from between said legs material forced between said legs during use of the tampering device, the drum comprising spaced rings and tie rods extending axially of the drum and spanning the spaces between respective rings, the said rotors being in respective annular series in which therotors of one series are circumferentially staggered with respect to the rotors of the next series, the rotors of each series being mounted on alternate tie rods and the intervening tie rods having spacers between rings, and rollers mounted to turn about the spacers and disposed in positions prox
  • a sheeps-foot rotor for tamping compactible material comprising a rotatably mounted hub, tamping legs extending generally radially from the hub and in close circumferential proximity, said legs having forwardly and rearwardly directed edges close together adjacent the hub and angularly divergent radially from corresponding edges of adjacent legs, said legs further having faces converging obliquely toward said edges and adapted to extrude axially from between said legs material forced between said legs during use of the rotor.
  • a device for tamping compactible material including in combination a series of rotors each of which comprises a rotatably mounted hub and generally radial sheeps-foot tamping legs, said legs having forwardly and rearwardly directed edges angularly spaced from like edges of adjacent legs and further having side surfaces convergent toward the respective edges and cooperating to extrude axially from between said legs material forced between the legs during use of the tamping device, and means upon which the respective rotor hubs are operatively mounted for independent rotation, said means comprising an axle shaft and a frame constituting means for positioning the shaft and having an element extending across the drum and provided with comb teeth between which the respective rotors move in proximity to the teeth during drum rotation on said shaft.
  • each rotor comprising a hub having generally radial legs which are closely proximate to each other adjacent the respective hub; the improvement which consists in providing the said legs with forwardly and rearwardly directed edges which are immediately adjacent in the vicinity of the hub to the edges of successive legs of the same series and which diverge angularly from such last mentioned edges in a radially'outward direction from the hub, said legs having side surfaces convergent toward respective edges, the surfaces of successive legs tending to extrude axially the material which is forced between said legs during use of the tamping device.
  • a device for tamping compactible material according to claim 4 in which the said edges of respective legs merge with the edges of successive legs in the vicinity of the hub.
  • a shaft hub means on the shaft from which spokes project radially, tie bolts in annular series about the shaft and connected with the spokes, sheeps-foot rotors mounted in annular series upon the tie bolts for orbital movement therewith about the axis of the shaft, each such rotor including a rotor hub also rotatable upon its respective tie bolt, each such rotor including a number of legs having portions radiating in immediate proximity to each other from the respective rotor hub, successive legs having opposed radially divergent edges forwardly and rearwardly directed and with side surfaces which are convergent toward said edges; the said surfaces of successive legs tending to extrude axially from between said legs material forced between said legs during use of the tamping device.
  • a tamping device in which said tie bolt supports a plurality of circumferentially disposed series of sheets-foot rotors, with the rotors of respective series being staggered with respect to the rotors of adjacent series, the forward and rearward edges of the respective legs being disposed substantially in a plane normal to the axis of said shaft.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Machines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
US617524A 1967-02-21 1967-02-21 Earth compacting device Expired - Lifetime US3446123A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61752467A 1967-02-21 1967-02-21

Publications (1)

Publication Number Publication Date
US3446123A true US3446123A (en) 1969-05-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US617524A Expired - Lifetime US3446123A (en) 1967-02-21 1967-02-21 Earth compacting device

Country Status (6)

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US (1) US3446123A (is")
BE (1) BE710615A (is")
FR (1) FR1554453A (is")
GB (1) GB1146339A (is")
NL (1) NL6801646A (is")
SE (1) SE315546B (is")

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5687799A (en) * 1996-08-12 1997-11-18 Caterpillar Inc. Wheel assembly for a compacting machine
US20080075534A1 (en) * 2005-04-29 2008-03-27 L Stern Jeff Ground engaging system for a machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5569680A (en) * 1979-02-22 1980-08-28 Rautenbach, A.C. Impact roller
EP0721029A1 (en) * 1995-01-06 1996-07-10 Charles Lee A ground compacting machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579839A (en) * 1948-02-20 1951-12-25 Letourneau Inc Hitch for earth compacting unit
US2587463A (en) * 1946-06-22 1952-02-26 Wm Bros Boiler & Mfg Co Tamping roller frame
US3269285A (en) * 1964-02-12 1966-08-30 William C Lathers Earth compacting device
US3318211A (en) * 1964-12-17 1967-05-09 W E Grace Mfg Co Earth compaction roller construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587463A (en) * 1946-06-22 1952-02-26 Wm Bros Boiler & Mfg Co Tamping roller frame
US2579839A (en) * 1948-02-20 1951-12-25 Letourneau Inc Hitch for earth compacting unit
US3269285A (en) * 1964-02-12 1966-08-30 William C Lathers Earth compacting device
US3318211A (en) * 1964-12-17 1967-05-09 W E Grace Mfg Co Earth compaction roller construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5687799A (en) * 1996-08-12 1997-11-18 Caterpillar Inc. Wheel assembly for a compacting machine
US20080075534A1 (en) * 2005-04-29 2008-03-27 L Stern Jeff Ground engaging system for a machine

Also Published As

Publication number Publication date
FR1554453A (is") 1969-01-17
SE315546B (is") 1969-09-29
GB1146339A (en) 1969-03-26
NL6801646A (is") 1968-08-22
BE710615A (is") 1968-06-17

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