1. A patient interface face contact element comprising a surface for contacting the face of a patient, and a connection face for coupling the patient interface face contact element to a support in the form of a rigid mask shell, wherein the face contact element comprises a magnetic coupling arrangement associated with the connection face for coupling the face contact element to the rigid mask shell.
2. An element as claimed in claim 1, wherein the surface comprises a seal for contacting the face of a patient.
3. An element as claimed in claim 1, comprising a cushion for contacting the face of a patient.
4. An element as claimed in claim 1, wherein the magnetic coupling arrangement comprises magnets which are inserted into retaining pockets of the element or moulded into the structure of the element.
5. An element as claimed in claim 1, wherein the magnetic coupling arrangement comprises a magnet arrangement which is separable from the connection face.
6. An element as claimed in claim 5, wherein the magnetic coupling arrangement comprises a magnet arrangement to be applied against a back of the connection face.
7. A patient interface support comprising a rigid mask shell having a coupling surface for coupling to a patient interface face contact element, wherein the support comprises a magnetic coupling arrangement associated with the coupling surface for coupling the rigid mask shell to the patient interface face contact element.
8. A support as claimed in claim 7, wherein the magnetic coupling arrangement comprises magnets which are inserted into retaining pockets of the support or moulded into the structure of the support.
9. A support as claimed in claim 7, comprising a gas delivering coupling for receiving a gas for supply to the patient.
10. A patient interface for communicating a gas to the nose or the nose and mouth of a patient, comprising a support and a face contact element, wherein the face contact element is as claimed in any one of claims 1 to 6 andor the support is as claimed in claim 7.
11. A patient interface as claimed in claim 10, wherein:
the support comprises magnetic elements and the face contact element comprises ferromagnetic regions for interfacing with the magnetic elements 32; or
the face contact element comprises magnetic elements and the support comprises ferromagnetic regions for interfacing with the magnetic elements; or
the face contact element and the support each comprise magnetic elements with opposite poles facing each other.
12. A patient interface as claimed in claim 10, further comprising at least one headgear strap clip, wherein the clip is adapted to be retained magnetically by the magnetic coupling arrangement of the support andor the face contact element.
13. A patient interface as claimed in claim 12, wherein the face contact element, the support and the clip are stacked, and the magnetic coupling arrangement comprises at least one stack of a magnet element or elements and a ferromagnetic element or elements, with the face contact element, the support and the clip each having a respective one of the elements.
14. A patient interface as claimed in claim 12, further comprising a headgear strap arrangement for coupling to the headgear strap clip or clips.
15. A patient interface as claimed in claim 12, wherein the face contact element, the support and the clip each comprise non-planar physical alignment features.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An austenitic stainless steel characterized by consisting of, by mass %, C: more than 0.05% to 0.15%, Si: 2% or less, Mn: 0.1 to 3%, P: 0.04% or less, S: 0.01% or less, Cr: more than 20% to less than 28%, Ni: more than 15% to 55%, Cu: more than 2% to 6%, Nb: 0.1 to 0.8%, V: 0.02 to 1.5%, sol. Al: 0.001 to 0.1%, N: more than 0.05% to 0.3% and O (Oxygen): 0.006% or less, and the balance Fe and impurities, further characterized by satisfying the following formulas (1) and (2):
P1(11Cu)(1) sol.Al0.4N(2)
wherein each element symbol in the formulas (1) and (2) represents the content (mass %) of each element.
2. An austenitic stainless steel characterized by consisting of, by mass %, C more than 0.05% to 0.15%, Si: 2% or less, Mn: 0.1 to 3%, P: 0.04% or less, S: 0.01% or less, Cr: more than 20% to less than 28%, Ni: more than 15% to 55%, Cu: more than 2% to 6%, Nb: 0.1 to 0.8%, V: 0.02 to 1.5%, sol. Al: 0.001 to 0.1%, N: more than 0.05% to 0.3% and 0 (Oxygen): 0.006% or less, and at least one element selected from the group consisting of Co: 0.05 to 5%, Mo: 0.05 to 5%, W: 0.05 to 10%, Ti: 0.002 to 0.2%, B 0.0005 to 0.05%, Zr: 0.0005 to 0.2%, Hf: 0.0005 to 1%, Ta: 0.01 to 8%, Re: 0.01 to 8%, Ir: 0.01 to 5%, Pd: 0.01 to 5%, Pt: 0.01 to 5% and Ag: 0.01 to 5%, and the balance Fe and impurities, further characterized by satisfying the following formulas (1) to (3).
P1(11Cu)(1) sol.Al0.4N(2) Mo(W2)5(3)
wherein each element symbol in the formulas (1) to (3) represents the content (mass %) of each element.
3. An austenitic stainless steel characterized by consisting of, by mass %, C: more than 0.05% to 0.15%, Si: 2% or less, Mn: 0.1 to 3%, P: 0.04% or less, S: 0.01% or less, Cr: more than 20% to less than 28%, Ni: more than 15% to 55%, Cu: more than 2% to 6%, Nb: 0.1 to 0.8%, V: 0.02 to 1.5%, sol. Al: 0.001 to 0.1%, N: more than 0.05% to 0.3% and O (Oxygen): 0.006% or less, and at least one element selected from the group consisting of Mg: 0.0005 to 0.05%, Ca: 0.0005 to 0.05%, Y: 0.0005 to 0.5%, La: 0.0005 to 0.5%, Ce: 0.0005 to 0.5%, Nd: 0.0005 to 0.5% and Sc: 0.0005 to 0.5%, and the balance Fe and impurities, further characterized by satisfying the following formulas (1) and (2).
P1(11Cu)(1) sol.Al0.4N(2)
wherein each element symbol in the formulas (1) and (2) represents the content (mass %) of each element.
4. An austenitic stainless steel characterized by consisting of, by mass %, C: more than 0.05% to 0.15%, Si: 2% or less, Mn: 0.1 to 3%, P: 0.04% or less, S: 0.01% or less, Cr: more than 20% to less than 28%, Ni: more than 15% to 55%, Cu: more than 2% to 6%, Nb: 0.1 to 0.8%, V: 0.02 to 1.5%, sol. Al: 0.001 to 0.1%, N: more than 0.05% to 0.3% and O (Oxygen): 0.006% or less, and at least one element selected from the group consisting of Co: 0.05 to 5%, Mo: 0.05 to 5%, W: 0.05 to 10%, Ti: 0.002 to 0.2%, B: 0.0005 to 0.05%, Zr: 0.0005 to 0.2%, Hf: 0.0005 to 1%, Ta: 0.01 to 8%, Re: 0.01 to 8%, Ir: 0.01 to 5%, Pd: 0.01 to 5%, Pt: 0.01 to 5% and Ag: 0.01 to 5%, and further at least one element selected from the group consisting of Mg: 0.0005 to 0.05%, Ca: 0.0005 to 0.05%, Y: 0.0005 to 0.5%, La: 0.0005 to 0.5%, Ce: 0.0005 to 0.5%, Nd: 0.0005 to 0.5% and Sc: 0.0005 to 0.5%, and the balance Fe and impurities, further characterized by satisfying the following formulas (1) to (3).
P1(11Cu)(1) sol.Al0.4N(2) Mo(W2)5(3)
wherein each element symbol in the formulas (1) to (3) represents the content (mass %) of each element.
5. An austenitic stainless steel according to any of claims 1 to 4 claim 1, further characterized by satisfying the following formula (4).
O1(60Cu)(4)
wherein each element symbol in the formula (4) represents the content (mass %) of each element.
6. An austenitic stainless steel according to claim 2, further characterized by satisfying the following formula (4).
O1(60Cu)(4)
wherein each element symbol in the formula (4) represents the content (mass %) of each element.
7. An austenitic stainless steel according to claim 3, further characterized by satisfying the following formula (4).
O1(60Cu)(4)
wherein each element symbol in the formula (4) represents the content (mass %) of each element.
8. An austenitic stainless steel according to claim 4, further characterized by satisfying the following formula (4).
O1(60Cu)(4)
wherein each element symbol in the formula (4) represents the content (mass %) of each element.