Patent ID: 7735688

Claim:
A pump dispenser that is connectable to a bottle and is manually operated to pump liquid from the bottle interior, pump dispenser comprising: a pump plunger having a tubular length with a center axis that defines mutually perpendicular axial and radial directions relative to the pump dispenser, the pump plunger having a discharge passage extending axially through the pump plunger; at least one piston on the pump plunger; a pump housing that receives the pump plunger for axially reciprocating movements of the pump plunger between a first, charge position and a second, discharge position of the pump plunger relative to the pump housing; an air vent passage through the pump dispenser that provides communication between the bottle interior and an exterior environment of the pump dispenser when the pump dispenser is connected to the bottle; a cylindrical collar mounted on the pump dispenser for manual rotational movement of the collar around the pump dispenser between a vent closed position of the collar on the pump dispenser where the collar closes the air vent passage through the pump dispenser and a vent opened positioned of the collar on the pump dispenser where the collar opens the air vent passage through the pump dispenser; a dispenser head on the pump plunger, the dispenser head having an outlet passage that communicates with the pump plunger discharge passage and extends radially from the discharge passage, the dispenser head moving with the pump plunger between the first, charge position and the second, discharge position of the pump plunger relative to the pump housing, and the dispenser head having a lock that prevents the dispenser head from moving with the pump plunger between the first, charge position and the second, discharge position of the pump plunger when the collar is in the closed position, and allows the dispenser head to move with the pump plunger between the first, charge position and the second, discharge position of the pump plunger when the collar is in the opened position.