Fluid dispensing device

摘要

A fluid dispensing device for dispensing a fluid having a viscosity of from 10 to 2000 mPas at 25° C., the dispensing device having at least one finger-operable lever pivotably moveable into the housing transversely with respect to the longitudinal axis of the fluid discharge device, to apply a force to an actuating member connected to the neck of a container, the device having a pre-load to prevent pivoting until a pre-determined force is applied, wherein the actuating member and the lever have surfaces which slidingly interact, wherein the pre-load is formed by one of the surfaces of the actuating member or the lever having a dual-gradient profile.

主权项

1. A fluid dispensing device for spraying a fluid into a body cavity comprising a housing, a nozzle at an upper end of the device for insertion into a body cavity, a fluid discharge device moveably housed within the housing, the fluid discharge device having a longitudinal axis and comprising a container containing a fluid medicament formulation to be dispensed and a compression pump having a suction inlet located within the container and a discharge tube extending along the longitudinal axis for transferring fluid from the compression pump to the nozzle, and at least one finger-operable lever pivotally supported at a lower end thereof on the housing so as to be pivotable into the housing, transversely with respect to the longitudinal axis of the fluid discharge device, from a rest position to an actuated position to apply a force to an actuating member connected to a neck of the container to move the container upwards along the longitudinal axis towards the nozzle so as to actuate the compression pump, wherein a pre-load is formed between the at least one finger operable lever and the actuating member to prevent pivoting of the at least one finger-operable lever from the rest position to the actuated position for actuation of the compression pump until a pre-determined force is applied to the at least one finger-operable lever, wherein the actuating member and the at least one finger-operable lever have surfaces which slidingly interact when the at least one finger-operable lever pivots from the rest position to the actuated position to move the container upwards along the longitudinal axis, wherein the pre-load is formed by one of the surfaces having a dual-gradient profile comprising first and second surface portions on which the other surface successively slides as the at least one finger-operable lever pivots from the rest position to the actuated position, wherein the first and second surface portions of the dual-gradient profile are respectively a concave, high gradient surface portion and a convex, low gradient surface portion such that the at least one finger-operable lever is not able to transfer any significant force to the container along the longitudinal axis until the predetermined force is applied to the at least one finger-operable lever, and wherein said fluid medicament formulation has a viscosity of from 10 to 2000 mPa·s at 25° C.