Abstract: A hammering system for a compartmented, rotary metering drum comprising an elongated member rotatably supported on bearings, a lever pivotably mounted on the elongated member, hammers mounted on one end portion of the lever, and a biasing mechanism secured to the other end portion of the lever urging the lever to pivot about its fulcrum to engage the hammers with the metering drum. The metering drum has cocking structures associated with the leading face of each vane on the drum which forces the hammers away from the drum and suddenly releases the hammers to subsequently strike the drum to knock away any caked material therefrom.

Abstract: Method and apparatus for maintaining a road or the like wherein liquid asphalt cement and aggregate are separately carried to a job site. The temperature of both of these is maintained within a range of from about 70.degree. F. to about 250.degree. F. for the aggregate and a range of from about 100.degree. F. to about 195.degree. F. for the liquid asphalt cement. The aggregate is metered onto delivery means and delivered thereby to a mixing means. The liquid asphalt cement is pumped from its container to the mixing means whereupon the aggregate and the liquid asphalt cement are mixed together and delivered to a spreading means. In addition, a filler hopper and metering means for filler material can be provided as well as a second tank for water with associated metering and piping means can be used. Two specific embodiments of the mixing means are presented, namely, a homogenizing mixer and a mix-conveyor. Auxiliary power means are provided for powering the moving elements of the apparatus.