In the locked position I of the bars, shown in solid lines in Figure 7, the long branches 29 have a substantially radial direction and the sets of the corresponding projections beyond the periph` ery of the discs 4 and 5 form sheeps feet adapted to compact a deep layer.
Three wheel Roller: They have one wheel at the front and two-wheel at the rear end. The load per cm width is derived from the gross weight of the drum.The smooth wheeled rollers consists of one large steel drum in front and two steel drums on the rear.
In accordance with the embodiment illustrated in Figs. They correspond to compaction at a lesser depth, because, for a constant Weight of the machine, bearing surfaces are larger and penetration of the feet is therefore less. After a few trips, the soil will have settled sufficiently to permit deep compaction. The latter is constituted simply by a cylindrical member 54 welded to the end of a at lever 55 and traversed by an eccentric pin B turning in the fork. The frame is constituted by a central box-section welded steel beam 33 forming two symmetrical trails 34, at the end` of each of which is articulated a towing ring 35. After the bar has been turned, the key must be so directed as to be able to be engaged again between the same studs 59. You will receive a link and will create a new password via email.Sorry, you do not have permission to ask a question, You must login to ask question. (ii) Sheepsfoot roller Roller: Sheepsfoot rollers are used for compacting fine grained soils such as heavy clays and silty clays. Fig. It is worthy of note that between bearing surfaces, the gaps between compacting members remain entirely open. A sheeps foot roller comprising a hub having two parahel axially spaced discs at the ends thereof, a plurality of circumferentially spaced bars rotatably mounted at the peripheral portions of said discs with the axes of the bars parallel to the axis of the hub, a plurality of axially equally spaced identical compacting members carried by each bar, each member having radial projections of different size and shape, corresponding projections oi the compacting members forming a set, the projo-@tions of one set having bearing surfaces angularly spaced from the bearing surfaces of the projections of another set, and of different radial extent and diierent end area from the projections of another set, and means for locking the bars in selected positions against rotation relative to the discs with one set of projections of the compacting members projecting radially beyond the periphery of said discs, the projections of one set being of greater radial extent than the projections of the other ing two parallel axially spaced discs at the ends sets and each of said projections of greater radial extent having a curved side flank forming a projection of another set having a lesser radial extent, the set of projections of lesser radial extent when in operative position having said curved flanks concentric with the axis of said hub.
3. When it is desired to obtain a compact subsoil in public works, for example in the construction of roads or runways for aircraft, use is thus commonly made of sheeps foot rollers. A sheeps foot roller according to claim 6 in which the tensioning means comprises a fork, a rod mounted on one of the discs for longitudinal movement radially oi the disc, a pulley carried by the fork and bearing on said cable, spring means urging the rod and pulley carried thereby to a position to tension the cable, another pulley bearing on said cable and manually actuated means for shifting the last mentioned pulley to vary the tension in the ca'ble. April 6, 1954 J. M. PARAMYTHIOTI SHEEPS FOOT ROLLER '7 Sheet's-Shee'l 2 Filed 001'.. 19, 1950 .NGE SHEEPS FOOT ROLLER v Filed oct. 19, 195o 7 sheets-sheet s FIGS April '6, 1954 J. M 'PARAMYTHlo-rl 2,674,165 sHEEPs FooT ROLLER Filed Oct. 19, 1950 7 Sheets-Sheet 4 FIG? Fig. In Figs.
The weight of this roller can be increased by ballasting with concrete blocks.Typical weights vary between 5.5 tonnes net and 15 tonnes ballasted. Tension of the cables may be obtained simultaneously by an elastic tensioning member and by a hand tensioning means." notches 4l cut in the edge of each of the side plates and regularly distributed over the periphery, these notches having a semi-circular base of the same diameter as the bearing surfaces.
2. The advantages are similar to the cellar silo, but the trench silo is more suitable for mechanization. These rollers are generally used for finishing the upper surface of the soil. Below are light equipments for soil compaction:Rammers are used for compacting small areas by providing impact load to the soil.
1950 April 6, 1954 Filed Oct. 19. Following are different types of these equipments:The most suitable soils for these roller type are well graded sand, gravel, crushed rock, asphalt etc.
The projections are formed in the example illustrated by two unequal branches, a short one 21 having a wide end 28, and the other a long one 2R. The outer ilank of the latter branch projects outwardly at 3l on its hub and follows a curved line 32which, together with that of the neighbouring members can constitute a rolling circumference for the roller, as will be seen hereinafter. They are mutually imbricated, because, as has been seen, each foot 29 bears against a neighbouring bar between two compacting members of that bar. These rollers are also called tamping rollers. Another object of the invention is to permit, with a single sheeps foot roller and by a succession of simple regulating operations, the progressive compaction of soil from a deep layer to the surface.
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