Patent ID: 6321942
Filing Date: 2001-11-27
Classification: B05B

Abstract:
Discharge device for discharging a flowable medium (24) comprising:a housing having a first housing part (12) and a second housing part (25);a pump piston (21) disposed in at least one of the first housing part (12) and the second housing part (25) and moved in response to movement of at least one of the first housing part (12) and the second housing part (25);a medium reservoir (20) for containing the medium (24), said medium reservoir (20) also forming a pump chamber (23), said pump piston (21) being moveable to produce pressure in the pump chamber (23);a discharge channel (19) leading from the pump chamber (23) to a discharge opening (14) to allow release of the medium (24) when the pump piston (21) is moved to produce pressure in the pump chamber (23);at least one intermediate stop (37) disposed between a starting position and a subsequent position of the second housing part (25), said intermediate stop being non-destructible in response to a first discharge stroke and separating said first discharge stroke from a second discharge stroke to prevent complete emptying of said medium reservoir (20) in a single motion;at least two pressure release points (27) restricting operation of the second housing part (25) until a minimum actuating force is applied to overcome the pressure release points (27) and allow movement of the second housing part (25) through a first discharge stroke; andwherein the second housing part (25) is operable for moving the pump piston (21) in a first direction through a first discharge stroke from a starting position to the non-destructible intermediate stop (37) and through a second discharge stroke from the non-destructible intermediate stop (37) to the subsequent position to discharge successive partial charges of said medium.