Manually operable pump for mixing and dispensing primary and secondary fluids

A manually operable dispensing pump for use with a primary container containing a primary fluid, the dispensing pump comprising:

• a. a body having
• i. primary attachment means to attach the body to the primary container;
• and
• ii. secondary attachment means;
• b. the body including a sprayer mechanism that includes
• i. a piston and cylinder having a cylinder head space above the piston;
• ii. a mixing chamber in fluid communication with the cylinder head space;
• iii. primary fluid transfer means for transferring fluid to the mixing chamber from the primary container, including a primary check valve that allows fluid being transferred to flow only toward and not away from the mixing chamber;
• iv. manual operating means for reciprocatingly moving the piston within the cylinder, alternatingly increasing and decreasing the cylinder head space to draw contents into the mixing chamber and then to expel the contents;
• and
• v. a discharge orifice and a discharge conduit that provides fluid communication between the mixing chamber and the discharge orifice, the discharge conduit having a discharge check valve that permits fluid to move in the discharge conduit only toward the discharge orifice;
• and
• c. a secondary container attachable by the secondary attachment means directly to the body at a location remote from the primary container, the secondary container having a holding chamber for holding selected contents and an outlet that provides immediate communication between the holding chamber and the sprayer mechanism when the secondary container is attached to the body so that contents of the secondary container can pass immediately into the mixing chamber, one of the sprayer mechanism and the secondary container having a secondary check valve that permits contents of the secondary container to move only toward and not away from the mixing chamber;
• whereby, when a user moves the piston by use of the manual operating means, contents of the secondary container and fluid from the primary container both first are drawn into the mixing chamber and then are expelled through the discharge orifice via the discharge conduit.