Locking system for pump dispenser

In a hand held liquid dispenser comprising a container for liquid to be dispensed, a container cap mounted on the container, a hollow vertically reciprocable plunger mounted on the container through which the liquid is dispensed, an actuating button having a horizontally projecting discharge channel member which communicates with the hollow vertically reciprocable plunger, and means urging the hollow vertically reciprocable plunger to its uppermost position, the improvement comprising the provision of a locking system for said vertically reciprocable plunger, the system comprising:

• a turret collar mounted on the container cap which projects upwardly and generally surrounds and guides the actuating button on its vertical reciprocable path, said turret collar having a vertical slot formed in the wall thereof adapted to receive the horizontally projecting discharge channel member which extends substantially beyond the circumference of the turret collar, said vertical slot being sufficiently long to permit full vertical movement of the discharge channel member in conjunction with operation of the hand held liquid dispenser, and a locking groove formed in the wall of said turret collar communicating with the vertical slot, said locking groove comprising a horizontally extending groove portion joining a vertically oriented groove at an upwardly curved portion, said vertically oriented groove having a closed upper end spaced a first distance below the uppermost position of the top of said actuating button and the opening of said horizontally extending groove portion being spaced a second greater distance below the uppermost position of the top of said actuating button so as to receive the discharge channel member on depression of said actuating button by an amount substantially equal to said second distance and relative rotation of said discharge member and said turret collar, said plunger urging means, when pressure is released from the actuating button, forcing said discharge channel member upwardly along said upwardly curved portion and into engagement with the closed upper end of said vertical slot.