摘要:
The present invention relates to an apparatus for laying and rolling out coating or paving materials, comprising a single means in the form of a roller for laying as well as rolling out and leveling fluid and solid materials within a wide range of temperatures, said roller having a shield plate to prevent the material being laid to pass over the overside of said roller.
摘要:
The object of the invention is a spreading device (1) for a mass substance used in road construction, which is intended to be used as an accessory to a machine (2) equipped with a lifting boom (35), and which includes a feed silo (22) for the mass to be spread and an opening (17), through which the mass flows onto the road, field, or similar.The device includesan attachment counterpiece (9) located on a joint (36) at the rear of the device, which permits the spreading device (1) to bend freely when seen from the side, and to which the boom (35) of the machine (2) is attached,support wheels (5) that turn around a vertical joint axle (11) in front of the opening (17), anda roller wheel (6) or other pre-compaction member behind the opening (17) in order to pre-compact the spread mass.
摘要:
Vehicle including, mounted on a chassis, a device for receiving material to be spread, a device for transferring the material towards a spreading component, a tank for binding product, a distribution bar, and a motorization assembly. The chassis includes at a rear portion, after the component for spreading the material, and mounted on rollers or balls that are rotatable independent of rolling elements mounted on a front portion, at least one of the motorization assembly, the tank and a control and transmission mechanism providing weight to the rear portion to permit the rear portion to act as a compactor.
摘要:
A concrete rail bed is provided with a pair of longitudinally extending laterally spaced rail-supporting pedestals with a connector between them, and each having a rail-receiving slot. The bed may be either precast or cast in place and may be reinforced as required. A rail has a head, a stem extending downwardly from the head, and flanges extending outwardly from the bottom region of the head. The rail is configured such that the stem fits into the slot of the concrete bed, with an elastomeric material inserted between the stem and the walls to substantially fill the slot.
摘要:
Apparatus for effecting passes of a self-propelled compacting machine following a spreading machine after the latter has laid a strip of surfacing composition. A guide vehicle is hitched to the spreading machine and is towed therewith, and has a guide member which may either have the contour of a closed geometrical figure such as a circle or be simply a pivot. The compacting machine turns about the guide vehicle along an epicycloidal path of travel. A sensing device on the compacting machine which may be a feeler or a flexible member is responsive to the variations of the radial distance between the compacting machine and guide member. The sensing device operates a limit switch when the variations exceed a predetermined amount which in turn controls an electrically operable hydraulic valve which communicates with a double-action cylinder and piston unit controlling in turn the direction of the front wheel of the compacting machine for increasing or decreasing the turning radius thereof. The compacting machine is thus entirely automatic and needs no driver when in operation. Such a compacting machine is also provided with a conventional steering wheel and can be used independently of the guide vehicle and the spreading machine.