Title:
A BUBBLE ENTRAPMENT DEVICE WITH VARIABLE VOLUME
Document Type and Number:
WIPO Patent Application WO/2013/092418
Kind Code:
A3
Abstract:
A bubble entrapment device (200) has a cylinder (201), a plunger (202), and a centre tube (203). Threads (210(a) and 211(a)) on the centre tube (203) engage threads (210(b) and 211(b)) of the cylinder (201) and the plunger (202) respectively. The device (200) has a chamber (225) with a tapered end configuration provided by the fact that the cylinder (201) has a funnel-shaped base (215) and the plunger (202) has a corresponding concave shape (216). Rotation of the tube handle (230) while holding the cylinder (201) causes the chamber to change in volume, but the chamber outlet (227) remains in the centre of volume throughout. During use, the chamber will be retained at or near maximum volume, but near end of dose this may be reduced so that residual liquid is expelled. This is particularly advantageous for applications such as neo natal delivery systems, where dose volumes are small.
Inventors:
BRYAN KEITH (IE)
Application Number:
PCT/EP2012/075565
Publication Date:
August 15, 2013
Filing Date:
December 14, 2012
Export Citation:
Assignee:
CORK INST TECHNOLOGY (IE)
International Classes:
A61M5/14; A61M1/36; A61M5/36
Domestic Patent References:
| WO2011077420A1 | 2011-06-30 |
Foreign References:
| US2664085A | 1953-12-29 | |||
| US3833013A | 1974-09-03 | |||
| US7279031B1 | 2007-10-09 |
Attorney, Agent or Firm:
WELDON, Michael et al. (Duncairn House,,14 Carysfort Avenue,,Blackrock, County Cork, IE)
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