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US 2014/0373843 A1Published application
Limb for breathing circuit
AssigneeFisher & Paykel Healthcare Limited
InventorNathan Lee Gray
Life of this patent
Estimating the term…
Abstract
A limb for a breathing circuit manufactured from very thin walled polymer materials has an elongate axial reinforcing spine lying freely inside the conduit and fixed to each end connector. The spine is laterally compliant but axially stiff. The spine provides resistance to tensile and compressive loads on the conduit, including that induced by prevailing internal pressures.
Claims20
A limb for a breathing circuit comprising:
- a very thin walled flexible conduit having a first end and a second end and a breathing gases pathway therebetween,
- a first connector fixed to said first end of said conduit,
- a second connector fixed to said second end of said conduit, and
- an elongate reinforcing member lying freely within said very thin walled conduit along a non-tortuous path from one end of said conduit to the other end of said conduit, and connected with said first connector and said second connector, such that said member reinforces said conduit against contraction along the length of said conduit due to fluctuating internal pressure, and
- wherein said elongate reinforcing member has a cross sectional area, measured from the outer perimeter, less than 10% of the cross sectional area of the bore of said breathing conduit.
2 more elements
(canceled)
A method for manufacturing a limb for a breathing circuit comprising:
- providing a very thin walled flexible breathing conduit having a first end and a second end,
- locating an elongate reinforcing member having a first and a second end, lying freely within said conduit, along a non-tortuous path from one end of said conduit to the other end of said conduit, said elongate reinforcing member having a cross sectional area, measured from the outer perimeter, less than 10% of the cross sectional area of the bore of said breathing conduit,
- fixing a first end connector with a first end of said breathing conduit, and a first end of said elongate reinforcing member, and
- fixing a second end connector with said second end of said conduit and said second end of said elongate reinforcing member, such that said member reinforces said conduit against contraction along the length of said conduit due to fluctuating internal pressure.
1 more element
Dependencies are inferred from the claim text.