Abstract: An improved filter screen system for a pavement sweeper (10) includes one or more filter screen assemblies (50) that are so-mounted as to slide-out from the main body of the debris hopper (18) for cleaning and, if desired, be separated from the debris hopper (18) for replacement. The slide-out screen system avoids the need for a worker to crawl into the interior of the debris hopper (18) to clean the filter screens (56).

Abstract: A road patching vehicle for patching damaged areas or potholes of various sizes and shapes on a roadway includes a boom assembly pivotally mounted at or on the forward end of the vehicle with a nozzle mounted at or toward the forward end of the boom. Various hoses connect the nozzle to a source of pressurized air, a source of patching emulsion (such as an asphalt emulsion), and a source of a rock aggregate with the vehicle operator controlling the flows individually or in various combinations thereof to prepare and then fill the pothole or other road defect to effect a patch. The nozzle is mounted on a pivot or journal to allow controlled pivoting or tilting of the nozzle under control of the operator in at least one degree of freedom. In a variant of the preferred form, the nozzle is mounted for control pivoting or tilting under the control of the operator in at least two degrees of freedom.

Abstract: An improved regenerative flow sweeping system for road and pavement sweeper vehicles includes first and second filter compartments as part of the recirculation loop in which the debris-entrained air is conducted from the intake hood into an initial separation compartment where some of the debris is removed from the air flow with the remaining air flow directed alternatively through one or the other of the first and second filter compartments for a selected period of time during which time finer particulates accumulate on the surface of the filter media. Thereafter, the air flow is redirected to the other filter compartment while pneumatic valves in the first filter compartment are selectively actuated to direct one or more pulses of compressed air into the filter media of the first filter compartment to remove accumulated particles on the filter media and effective “reverse flush” or purge the filter media.