Dual component trigger sprayer which mixes components in discharge passage

A trigger sprayer which draws at least two separate liquids from two separate container volumes and mixes the liquids prior to their being dispensed by the sprayer, the sprayer comprising:

• a sprayer housing, the housing having a cap for attaching the housing to two separate container volumes containing two separate liquids;
• a fluid discharge passage in the housing, the discharge passage having a length with opposite ends with a nozzle orifice for dispensing liquid from the discharge passage at one end and an inlet opening for receiving liquid into the discharge passage at the opposite end, the inlet opening being positioned adjacent an end wall of the discharge passage that is stationary within the sprayer housing;
• a pair of separate liquid passages in the housing, each passage of the pair extending between the discharge passage inlet opening and one of the two separate container volumes containing two separate liquids when the sprayer housing is attached to the two separate container volumes;
• a pair of exit openings in the discharge passage end wall opening into the discharge passage, at the inlet opening of the discharge passage, each liquid passage of the pair of separate liquid passages communicating with the discharge passage through one of the pair of exit openings in the discharge passage end wall;
• and
• at least one pump in the sprayer housing communicating with at least one of the liquid passages.

A trigger sprayer which draws at least two separate liquids from two separate container volumes and mixes the liquids prior to their being dispensed by the sprayer, the sprayer comprising:

• a sprayer housing, the housing having a cap for attaching the housing to two separate container volumes containing two separate liquids;
• a fluid discharge passage in the housing, the discharge passage having a length with a nozzle orifice for dispensing liquid from the discharge passage at one end and an inlet opening for receiving liquid into the discharge passage at an opposite end of its length;
• a pair of separate liquid passages in the housing, each passage of the pair extending between the discharge passage inlet opening and one of the two separate container volumes containing two separate liquids when the sprayer housing is attached to the two separate container volumes;
• at least one pump chamber in the sprayer housing communicating with at least one of the pair of liquid passages, a piston mounted in the pump chamber for reciprocating movement therein;
• a trigger mounted on the sprayer housing for pivoting movement of the trigger relative to the housing, the trigger being operatively connected to the pump piston for causing reciprocating movement of the pump piston in the pump chamber in response to pivoting movement of the trigger;
• and,
• a pair of separate vent chambers in the housing, each vent chamber of the pair communicating with one of the two separate container volumes containing two separate liquids when the sprayer housing is attached to the two separate container volumes;
• and
• each vent chamber having a vent piston mounted in the vent chamber for reciprocating movement therein between a first position of the vent piston in the vent chamber blocking venting of the container volume through the vent chamber to an exterior environment of the container volume, and a second position of the vent piston in the vent chamber opening venting of the container volume through the vent chamber to the exterior environment, the vent pistons being operatively connected to the trigger for causing reciprocating movement of the vent pistons in the vent chambers in response to pivoting movement of the trigger on the housing.