A hollow tubular elongated member is concentrically mounted to a borescope or surgical viewing instrument defining a spaced passage for flowing fluid to a cuff which is discretely located below the distal end of the lens of the borescope and which defines a discretely configured discharge port for flowing...http://www.google.es/patents/US5313934?utm_source=gb-gplus-sharePatente US5313934 - Lens cleaning means for invasive viewing medical instruments
Lens cleaning means for invasive viewing medical instruments
