Drying apparatus for an automatic car wash having separate sensing means for detecting the proximity of a nozzle to opaque top portions of vehicles and transparent top portions of vehicles to maintain the nozzle within a preselected proximity range of the top portions of the vehicles. Another sensing...http://www.google.co.uk/patents/US4949423?utm_source=gb-gplus-sharePatent US4949423 - Dryer for automatic car wash equipment
