Dispensers

摘要

Pump dispenser, particularly a movable-nozzle pump dispenser, is intended especially for use in dispensing oral medicines e.g. to children. One feature disclosed is a tooth or ratchet structure engageable between the plunger head and the pump cylinder body. This enables optional holding of the plunger at an intermediate position during a dispensing stroke, so that a dose can be given bit by bit. Other proposals are formations around the top of the cylinder body which interact with the inside of the plunger to control or limit movement of the plunger according to their relative rotational orientation. For example the plunger may be locked up unless turned forcibly past a rotational stop. A related feature is a spring lock tab preventing rotation of the plunger unless the tab is pressed to release it. The product container may contain balls to cause agitation.

主权项

1. A pump dispenser for dispensing fluid product from a supply container, said pump dispenser having a pump chamber with a valved inlet to communicate with the supply container and an outlet, the pump dispenser comprising a plunger and a pump body relative to which the plunger is reciprocable to alter the volume of the pump chamber in a dispensing stroke to dispense fluid product from the fluid outlet, wherein the pump dispenser having top and bottom limit positions for the plunger relative to the pump body and the plunger being biased towards the top limit position, wherein the improvement comprises:
a first engagement structure as part of said pump body; and a second engagement structure as part of said plunger, said second engagement structure being constructed and arranged to cooperate with said first engagement structure for retaining said plunger at an axially intermediate position between said top limit position and said bottom limit position, wherein said plunger is constructed and arranged to be rotated for disengagement of said first engagement structure and said second engagement structure when said plunger is at a said axially intermediate position.