Dispensing pump for spray bottle - has upper edge walls of trigger bulb providing valving actions, with release of bulb sucking in liq. from bottle

摘要

The pump is for dispensing liq. as a spray, and the trigger and the flexible pumping chamber (14) are an integral unit. The upper ex edge walls of the trigger bulb (58,56) provide the valving actions which open or close the passage ways to control the direction of fluid flow. On squeezing the trigger bulb, the fluid is exhausted through a gap, and on releasing the trigger it is recharged by liq. being sucked in from the container between the faces (58,59). The trigger may have a back stop (15) which may also act to deform the bulb when it is squeezed.