Patent ID: 6405902
Filing Date: 2002-06-18
Classification: B05B

Abstract:
A micro dispensing tip assembly for use with precision dispensing apparatus for delivering controlled micro amounts of fluid to a selected location on a surface comprising:a) an adapter having a longitudinal axis substantially parallel to flow of fluid therethrough and having a passage therethrough for connection at one end to said dispensing apparatus so that said passage is in fluid communication with an outlet of said apparatus; b) a dispensing tip having a longitudinal axis substantially parallel to flow of fluid therethrough and substantially parallel to the longitudinal axis of said adapter when said adapter and said dispensing tip are connected together, said dispensing tip comprising a body having opposite ends and an interior region defined by an inner surface extending axially inwardly from one of said ends, said tip including a dispensing nozzle at the other of said ends of said body and provided with an internal passage and an outlet in communication with said internal passage, said tip further comprising a foot extending from the other of said ends of said body and located adjacent said nozzle, said foot extending slightly axially beyond said nozzle outlet, said foot being adapted to contact the surface on which fluid is to be delivered so that a micro quantity of fluid can leave said nozzle outlet and be delivered to the surface; c) a liner body of material removably fitted in said interior region of said dispensing tip and in contact with said inner surface, said liner body having an unobstructed internal passage therethrough and in fluid communication with said interior region of said dispensing tip and with the internal passage of said nozzle, said liner body being of a material selected to be non-reactive with and impervious to the fluid being dispensed; d) means on said adapter and on said dispensing tip for releasably coupling said adapter and said dispensing tip together so that an end of said dispensing tip opposite said nozzle is adjacent another end of said adapter and said passage of said adapter is in fluid communication with said internal region of said dispensing tip; and e) so that the liner can be removed and replaced thereby avoiding the need to clean the fluid from the tip interior region.