Extensible cleaning tool

A telescoping cleaning tool adapted to remove debris from timing adjustment scales of an automobile and comprising:

• a. an outer tube having open ends of which one is adapted to receive air under pressure from a pressure-actuatable nozzle;
• b. an inner tube fitted within said outer tube in sliding engagement therewith, said inner tube having proximal and distal ends with respect to the air-receiving end of the outer tube, said proximal end terminating in an end surface at least partially in the path of the flow of air under pressure through said outer tube, and said distal end terminating in an end transversely crimped and machined at an angle to the tube axis and parallel to the crimp to provide both a debris-scraping chisel edge which is substantially normal to the direction of air flow through said tubes and an elongated orifice therein closely adjacent and aligned with said chisel edge and adapted to direct said air under pressure against debris adjacent the edge;
• c. A band rigidly attached circumferentially to the outer surface of said inner tube and having a plurality of spring strips extending therefrom substantially parallel to the direction of air flow, each spring strip being sinuously curved so as to alternately contact juxtaposed walls of the inner and outer tubes to restrain movement tending to displace the coaxial alignment therebetween;
• the end of said outer tube opposite said air-receiving end being turned inwardly about its periphery to an extent just sufficient to restrain passage to said band therethrough, said outer tube further having a handle extending laterally outwardly adjacent the air-receiving end thereof and adapted to be held by the fingers of one hand as the palm of that hand urges a pressure-actuated air nozzle into engagement with said air-receiving end.