Patent EP0457464A1 successfully refreshed from Google Patents.
EP0457464A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Prosthetic intramedullary femoral prosthesis with preformed sheath
Assignee: Stryker Ireland Ltd
•
Filing: 1991-05-01
•
Granted: —
•
Expires: 2011-05-01
Abstract
Abstract A prosthetic intramedullary femoral prosthesis (1) provided with a separate preformed sheath (9) made from an acrylic material which is dimensioned to enclose the prosthesis stem (4) from the distal tip (10) to a location on the stem (4) which will be adjacent the proximal cut end (6) of the femur (5) with which it will be used.
Inventors
- 👤 Jacques Vanderlinden
- 👤 Peter Lawes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:35
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/30721; A61F2/30724; A61F2/30767; A61F2/30907; A61F2/3676; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30565; A61F2002/30571; A61F2002/30579; A61F2/30771; A61F2002/30878; A61F2002/30919; A61F2/46; A61F2002/4631; A61F2310/00; A61F2310/00005; A61F2310/00353; A61F2310/00389; A61F2310/00952
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
A prosthetic intramedullary femoral prosthesis provided with a separate perforated sheath made from an acrylic material which is dimensioned to enclose the prosthesis stem from the distal tip to a location on the stem which will be adjacent the proximal cut end of the femur with which it will be used.
Claim 2
Dependent Claim
29 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 1 in which the sheath is dimensioned and constructed to allow the stem to move further into it under load.
Claim 3
Dependent Claim
58 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 3 in which the distal end of the sheath is in the form of a cup the inner end surface of which is spaced away from the distal end of the prosthesis stem to provide a void when initially located in position, to accept subsequent inward movement after fitting.
Claim 4
Dependent Claim
27 words
A prosthetic intramedullary femoral prosthesis as claimed in claims 1 to 3 in which the sheath is made from a material similar to bone cement, eg. polymethylmethacrylate.
Claim 5
Dependent Claim
26 words
A prosthetic intramedullary femoral prosthesis as claimed in claims 1 to 4 in which the sheath has a thickness of between 1/2 mm and 2 mm.
Claim 6
Dependent Claim
21 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 5 in which the sheath has a thickness of substantially 1 mm.
Claim 7
Dependent Claim
39 words
A prosthetic intramedullary femoral prosthesis as claimed in claims 1 to 6 in which said sheath is provided with means for centralising the prosthesis stem in the intramedullary canal of the femur with which it is to be used.
Claim 8
Dependent Claim
21 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 7 in which the centralising means include outwardly projecting resiliently deformable abutments.
Claim 9
Dependent Claim
29 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 8 in which the resilient abutments are in the form of resilient wings, fins or arms which can deform inwardly.
Claim 10
Dependent Claim
19 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 9 in which the abutments can deform substantially radially inwardly.
Claim 11
Dependent Claim
18 words
A prosthetic intramedullary femoral prosthesis as claimed in claim 9 in which the abutments can deform circumferentially inwardly.
Claim 12
Dependent Claim
19 words
A perforated sheath for use with an intramedullary femoral prosthesis as claimed in any one of the preceding claims.
References Cited (Backward Citations)
GB1409053A
Cited
DE2808740A1
Cited
GB2052267A
Cited
WO1981000670A1
Cited
GB2104391A
Cited
GB2162753A
Cited
EP0179626A2
Cited
US4728335A
Cited
EP0278807A2
Cited
DE3802214A1
Cited
DE9015067U1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.