Device for cleaning, melting and widening joints or cracks in asphalt pavements

摘要

1. Fixture to clean melt and distribute sealing compound for filling road surface joints and cracks, using a vehicle fitted with a housing, which on the side facing the road surface has a tapered outlet and on the side away from the road surface has an unobstructed inlet, which has a gas burner with a gas supply pipe in front of it, and leading into the housing is a compressed sir pipe with a straightlined end and outlet, during operation, the outflowing hot air jet from the tapered outlet is able to be directed at an acute angle to the joint that needs repairing, characterised by the fact that pipe (10, 11) is designed as a heat exchanger which traverses the housing (2) in spiral form, and with its outlet (12) is routed to about the same level as the tapered outlet (6) of the housing (2), to provide separate hot air outlets for the compressed air and the gas air mixture.