A fluid applicator has a fluid-containing cask within which is a displaceable piston operable in response to operation of a piston controller to dispense fluid through a dispensing valve from the cask to an applicator. A handle is removably coupled to the cask to facilitate the application of fluid to...http://www.google.es/patents/US6805682?utm_source=gb-gplus-sharePatente US6805682 - Fluid applicator
