Dispensing – With cutter and/or punch – To form dispensing opening in container
Patent
1999-04-23
2000-08-29
Shaver, Kevin
Dispensing
With cutter and/or punch
To form dispensing opening in container
22215314, 222 41, 222336, 2224021, B05B 908
Patent
active
06109479&
DESCRIPTION:
BRIEF SUMMARY
The invention relates to dispensing devices and particularly to dispensing devices for the dispensing liquid medicaments in a spray form.
The device may be used to dispense medicaments and is particularly suitable for nasal use.
WO-A-91/15303 discloses a dispensing device comprising a container for liquid to be dispensed, an outlet nozzle including means to break-up flow of liquid under pressure into a spray, a piston for forcing liquid out of the container under pressure and through the nozzle and drive means for moving the piston a predetermined distance to dispense a predetermined quantity of liquid from the container.
The invention provides a dispensing device comprising a container for liquid to be dispensed and initially closed at one end by a frangible seal, an outlet nozzle including means to break up a flow of liquid under pressure into a spray, a piston for forcing liquid out of the container under pressure and through the nozzle and drive means for moving the piston a predetermined distance to dispense a predetermined quantity of liquid from the container in which the nozzle includes a piercing portion extending adjacent to the frangible seal of the container, characterised in initial depression of the nozzle being used to break the seal by axial movement of the piercing portion.
The nozzle may include means initially preventing depression of the nozzle.
The device preferably includes a housing for the container and the prevention means preferably includes interengaging means on the nozzle and the housing. The interengaging means may comprise shaped slots formed in the outer wall of the housing and co-operating protrusions formed on an inner wall of the nozzle.
The device may include a cap provided for fitting over the outlet nozzle when the device is not in use and interengaging means on the cap and the drive means to allow rotation of the drive means by the cap in use of the device.
Preferably the drive means includes a plunger and an arming body for preloading the plunger, the arming body including the interengaging means for co-operation with the cap. The arming body may be located within a housing of the device with the cap fitting over an end portion of the housing to allow interengagement of the cap with the arming body, in use.
Preferably rotation of the arming body stores additional energy in a pre-loaded spring, valve means being provided for controlling the flow of liquid out of the device and operation of the valve means between a closed and open position allowing release of the additional spring energy and thereby movement of the plunger to dispense the predetermined quantity of liquid. The container may include a piston slidably located therein, the plunger acting on the piston to dispense the liquid.
In a preferred embodiment, the arming body and housing include mating ramp surfaces so that rotation of the arming body relative to the housing causes axial movement of the arming body relative to the housing.
In a further aspect of the invention, there is provided a dose counter, a housing of the device including an aperture or window through which the dose counter may be viewed, the dose counter providing an indication of the number of doses remaining in the device.
Further features and advantages of the invention will be apparent from the following description, by way of example, of a preferred embodiment of the invention, the description being read with reference to the accompanying drawings, in which:
FIG. 1 is a section view through a dispensing device according to the invention;
FIG. 2 is a transverse section through the lower part (drive assembly) of the device of FIG. 1;
FIG. 3 is an enlarged view of the lower end portion of the drive assembly of the device of FIGS. 1 and 2, and
FIG. 4 is an exploded view of the upper part of the device of FIG. 1.
Referring to the drawings, the main components of the dispensing device 10 are a drive assembly indicated generally by 11 which is contained within a lower housing portion 12, a valve assembly indicated generally by 13 which is cont
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Bespak plc
Cartagena M A
Shaver Kevin
LandOfFree
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