Patent US4650489A successfully refreshed from Google Patents.
US4650489A
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US
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Prosthetic device for implantation in bone
Assignee: Massachusetts Institute of Technology
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Filing: 1986-01-30
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Granted: 1987-03-17
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Expires: 2006-01-30
Abstract
Abstract The invention resides in a prosthesis device for implantation in a human or animal bone and includes a nonperforated sheath (4) having an open end (8) and a closed end (10). A rigid core (6) extends within the sheath. A member (22) divides the cavity into two portions (14 and 16), one being filled with elastomeric material and the second portion (16), adjacent the closed end of the sheath, is a pocket of compressible fluid defined by the interior of the closed end of the sheath and the member 22.
Inventors
- 👤 Amy Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61F2/32; A61F2/36; A61F2/3662; A61F2/30721; A61F2/30723; A61F2/30724; A61F2/3676; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30014; A61F2002/3006; A61F2002/30069; A61F2002/3007; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30136; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2002/30581; A61F2002/30589; A61F2002/30919; A61F2002/30929; A61F2002/3241; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2250/00; A61F2250/0014; A61F2250/0018; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00389; A61F2310/00395; A61F2310/00401; A61F2310/00407
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
85 words
A prosthesis device for implantation in a human or animal bone comprising: a sheath having an open end and a closed end, a core within the sheath, a cavity within the sheath, a portion of said cavity being filled with an elastomeric material, a divider ring within the sheath surrounding a portion of the core and spaced from the closed end, a pocket of compressible fluid surrounding the core and defined by the interior of the closed end of the sheath and the divider ring.
Claim 2
Dependent Claim
85 words
A prosthesis device for implantation in a human or animal bone comprising: a sheath having an open end and a closed end, a core within the sheath, a cavity within the sheath, a portion of said cavity being filled with an elastomeric material, a divider ring within the sheath surrounding a portion of the core and spaced from the closed end, a pocket of compressible fluid surrounding the core and defined by the interior of the closed end of the sheath and the divider ring.
Claim 3
Dependent Claim
110 words
A prosthesis device for implantation in a human or animal bone comprising, a nonperforated sheath having an open end and a closed end, a core within the sheath exiting from the open end and terminating short of the closed end, a cavity within the sheath surrounding the core, a dividing member disposed from the closed end of the sheath and surrounding a portion of the core, the dividing member engaging the interior of the sheath into two portions, the first portion being contiguous with the open end of the sheath and the second portion contiguous with the closed end, and a pocket of compressible fluid located in the second portion.
Claim 4
Dependent Claim
110 words
A prosthesis device for implantation in a human or animal bone comprising, a nonperforated sheath having an open end and a closed end, a core within the sheath exiting from the open end and terminating short of the closed end, a cavity within the sheath surrounding the core, a dividing member disposed from the closed end of the sheath and surrounding a portion of the core, the dividing member engaging the interior of the sheath into two portions, the first portion being contiguous with the open end of the sheath and the second portion contiguous with the closed end, and a pocket of compressible fluid located in the second portion.
Claim 5
Dependent Claim
114 words
A prosthetic device for implantation in a human or animal bone comprising: a sheath having an open end and a closed end, a core within the sheath extending from the open end and terminating short of the closed end, the cross section of the core at any given point lengthwise of the sheath being less than the cross section of the sheath at that point, a spacer member surrounding the core at a distance from the closed end and engaging the interior of the sheath to create a cavity between the core and the interior of the sheath, and a pocket of compressible fluid in the cavity between the spacer member and the core.
Claim 6
Dependent Claim
114 words
A prosthetic device for implantation in a human or animal bone comprising: a sheath having an open end and a closed end, a core within the sheath extending from the open end and terminating short of the closed end, the cross section of the core at any given point lengthwise of the sheath being less than the cross section of the sheath at that point, a spacer member surrounding the core at a distance from the closed end and engaging the interior of the sheath to create a cavity between the core and the interior of the sheath, and a pocket of compressible fluid in the cavity between the spacer member and the core.
Claim 7
Dependent Claim
17 words
Prosthesis device according to claim 1 wherein there are irregularities in the exterior surface of the sheath.
Claim 8
Dependent Claim
18 words
A prosthesis device according to claim 1 wherein there are indentations in the interior surface of the sheath.
Claim 9
Dependent Claim
17 words
A prosthesis device according to claim 1 wherein there are indentations in the surface of the core.
Claim 10
Dependent Claim
23 words
A prosthetic device according to claim 2 wherein the first portion of the cavity within the sheath is filled with an elastomeric material.
Claim 11
Dependent Claim
17 words
Prosthesis device according to claim 2 wherein there are irregularities in the exterior surface of the sheath.
Claim 12
Dependent Claim
18 words
A prosthesis device according to claim 2 wherein there are indentations in the interior surface of the sheath.
Claim 13
Dependent Claim
17 words
A prosthesis device according to claim 2 wherein there are indentations in the surface of the core.
Claim 14
Dependent Claim
12 words
Prosthesis device according to claim 5 wherein the spacer member is flexible.
Claim 15
Dependent Claim
29 words
Prosthesis device according to claim 5 wherein the portion of the cavity between the spacer member and the open end of the sheath is filled with an elastomeric material.
Claim 16
Dependent Claim
29 words
Prosthesis device according to claim 5 wherein the portion of the cavity between the spacer member and the closed end of the sheath is filled with a compressible fluid.
Claim 17
Dependent Claim
17 words
Prosthesis device according to claim 5 wherein there are irregularities in the exterior surface of the sheath.
Claim 18
Dependent Claim
18 words
A prosthesis device according to claim 5 wherein there are indentations in the interior surface of the sheath.
Claim 19
Dependent Claim
17 words
A prosthesis device according to claim 5 wherein there are indentations in the surface of the core.
Claim 20
Dependent Claim
13 words
A prosthesis device according to claim 3, wherein the spacer member is flexible.
Claim 21
Dependent Claim
27 words
A prosthesis device according to claim 3 wherein the portion of the cavity between the spacer member and the open end is filled with an elastomeric material.
Claim 22
Dependent Claim
25 words
A prosthesis device according to claim 3, wherein there are indentations in the surface of the core and in the interior surface of the sheath.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |