Back to results
US 6,805,120 B1Granted
Breathing assistance apparatus
AssigneeFisher & Paykel Healthcare Limited
InventorsCraig Robert Jeffrey, Graeme Woolmore, Anthony James Newland
Life of this patent
Estimating the term…
Abstract
A pressure regulator for regulating the expiratory flow in a CPAP system includes submerging a tube into a column of water. Improvements are included for adjusting the level to which the tube is submerged and for ensuring constant water level.
Claims9
A pressure regulating device for use with a breathing assistance apparatus which conveys inhalatory gas to, and removes exhalatory gas from a patient requiring breathing assistance, comprising:
- a container which in use includes a body of liquid, configured to have a substantially constant level in use, and an overflow outlet adjacent said constant level,
- a terminal conduit including proximate and distal ends, said proximate end adapted for connection to a breathing assistance apparatus and in use accepting exhalatory gas therefrom, and said distal end submerged in said body of liquid,
- such that in use the mean pressure of said gas supplied to a patient is adjusted by the level to which said distal end is submerged in said body of water.
Dependencies are inferred from the claim text.