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US 11,219,733 B2Granted
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.
Claims14
A limb for a breathing circuit comprising:
- a flexible conduit comprising a wall enclosing a breathing gases pathway, the flexible conduit comprising an annular or helical reinforcement;
- a first connector coupled to the flexible conduit, the first connector comprising a conduit receiving portion;
- a second connector coupled to the flexible conduit;
- an external reinforcing sheath extending over at least a portion of the wall of the flexible conduit, the external reinforcing sheath being braided, the external reinforcing sheath coupled to the first connector and the second connector;
- a first securing collar and a second securing collar configured to retain the external reinforcing sheath, the first securing collar and the second securing collar configured to be positioned over at least a portion of the external reinforcing sheath, the external reinforcing sheath configured to be fixed relative to the flexible conduit only at the first connector and the second connector, wherein the first securing collar is overmoulded over the external reinforcing sheath, the flexible conduit, and the conduit receiving portion;
- and
- wherein, when the limb is loaded in tension, stretching of the external reinforcing sheath causes the external reinforcing sheath to constrict radially, wherein the radial constriction is resisted by the flexible conduit resulting in a strain limiting effect for the limb.
4 more elements
A limb for a breathing circuit comprising:
- a flexible conduit having a first end and a second end and a breathing gases pathway therebetween, the flexible conduit comprising a wall and an annular or a helical reinforcement;
- a first connector coupled to the flexible conduit, the first connector comprising a conduit receiving portion;
- a second connector coupled to the flexible conduit;
- an external reinforcing sheath extending over at least a portion of the wall of the flexible conduit, the external reinforcing sheath being braided, the external reinforcing sheath being coupled to first connector and the second connector, the external reinforcing sheath being fixed relative to the flexible conduit only at the first connector and the second connector, wherein the external reinforcing sheath improves torsional stiffness of the limb;
- a first securing collar, wherein the first securing collar is overmoulded over the external reinforcing sheath, the flexible conduit, and the conduit receiving portion;
- and
- wherein, when the limb is loaded in tension, stretching of the external reinforcing sheath causes the external reinforcing sheath to constrict radially, wherein the radial constriction is resisted by the flexible conduit resulting in a strain limiting effect for the limb.
4 more elements
Dependencies are inferred from the claim text.