EP0145166B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Medical device comprising a shape memory alloy
Assignee: Raychem Corp
•
Filing: 1984-10-12
•
Granted: 1989-12-13
•
Expires: 2004-10-12
Abstract
Abstract Medical devices which are currently proposed to use elements made from shape memory alloys may be improved by the use of stress-induced martensite alloy elements instead. The use of stress-induced martensite decreases the temperature sensitivity of the devices, thereby making them easier to install and/or remove.
Inventors
- 👤 James Jervis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61C; A61C7/00; A61C7/12; A61B; A61B17/00; A61B17/064; A61B17/0642; A61B17/08; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61F2/02; A61F2/24; A61F2/2409; A61F6/00; A61F6/06; A61F6/14; A61L; A61L27/00; A61L27/02; A61L27/04; A61L31/00; A61L31/02; A61L31/022; A61C2201/00; A61C2201/007; A61F2/04; A61F2/06; A61F2/07; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2210/00; A61F2210/0014; A61F2210/0019; A61L2400/00; A61L2400/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A medical device which comprises: (a) an element for use within a mammalian body or in such proximity to a mammalian body that the device is substantially at body temperature, the element comprising a shape memory alloy which displays stress induced martensite behavior at body temperature; and (b) a restraint by means of which the shape memory alloy element is held in a deformed configuration to allow it to be positioned within or in proximity to a mammalian body, the deformation occurring through the formation of stress-induced martensite.
Claim 2
Dependent Claim
88 words
A medical device which comprises: (a) an element for use within a mammalian body or in such proximity to a mammalian body that the device is substantially at body temperature, the element comprising a shape memory alloy which displays stress induced martensite behavior at body temperature; and (b) a restraint by means of which the shape memory alloy element is held in a deformed configuration to allow it to be positioned within or in proximity to a mammalian body, the deformation occurring through the formation of stress-induced martensite.
Claim 3
Dependent Claim
44 words
A device as claimed in claim 1, in which the restraint is hollow, and the shape memory alloy element is deformed in such a way that it is compressed transversely, and is positioned within the restraint, the restraint preventing transverse expansion of the element.
Claim 4
Dependent Claim
14 words
A device as claimed in claim 2, in which the restraint is a catheter.
Claim 5
Dependent Claim
19 words
A device as claimed in claim 2, in which the shape memory alloy element is an intrauterine contraceptive device.
Claim 6
Dependent Claim
21 words
A device as claimed in claim 3, in which the shape memory alloy element is a filter for a blood vessel.
Claim 7
Dependent Claim
30 words
A device as claimed in claim 1, in which the shape memory alloy element is tubular, and the restraint is positioned within the shape memory alloy element to deform it..
Claim 8
Dependent Claim
17 words
A device as claimed in claim 6, in which the shape memory alloy element is a catheter.
Claim 9
Dependent Claim
18 words
A device as claimed in claim 1, in which the shape memory alloy element is a bone plate.
Claim 10
Dependent Claim
17 words
A device as claimed in claim 1, in which the shape memory alloy is a marrow nail.
Claim 11
Dependent Claim
18 words
A device as claimed in claim 1, in which the shape memory alloy element is a bone staple.
Claim 12
Dependent Claim
17 words
A device as claimed in claim 1, in which the shape memory alloy element is a clip.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.