Patent ID: 6065647
Filing Date: 2000-05-23
Classification: B05B

Abstract:
A pump dispenser comprising:a. a tubular piston and a hollow body receiving the piston, the tubular piston and hollow body defining a pumping chamber,b. an annular retainer secured to the body and supporting the piston for reciprocation,c. an outlet valve for the pumping chamber,d. locking means for locking the outlet valve closed,e. an axially disposed reciprocal actuator means for the piston, the actuator means having lockdown means, the actuator means controlling the outlet valve by vertical movement and controlling the locking means for the outlet valve and the lockdown means by rotary movement so that the dispenser is operable only if the actuator means is turned in one rotary unlocking direction to unlock the outlet valve and to undo the lockdown means,f. a first detent system comprising a first longitudinal rib disposed between the actuator means and piston for the locking means for the outlet valve,g. a second detent system comprising a second longitudinal rib disposed between the piston and retainer for the lockdown means, the second detent system being more difficult to overcome than the first detent system as the actuator means is rotated in the unlocking direction so that the outlet valve is freed before the lockdown means.