Patent US4248232A successfully refreshed from Google Patents.
US4248232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dissolving the bond between interconnected components
Assignee: Biomet Manufacturing LLC
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Filing: 1978-09-12
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Granted: 1981-02-03
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Expires: 1998-09-12
Abstract
Abstract An ultrasonic tool is used for dissolving the bond between nested components cemented together by a plastic layer. The vibrating tool causes softening of at least portions of the plastic layer, and subsequently the components can be readily detached from one another.
Inventors
- 👤 Eckart Engelbrecht
- 👤 Elmar Nieder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:19
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/76; A; A61; A61N; A61N7/00; B06; B06B; B06B3/00; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2002/465; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/923; Y10S83/00; Y10S83/956; Y10T; Y10T156/00; Y10T156/19; Y10T156/1922; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49821
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
In a method of dissolving the bond between an artificial prosthesis component and a bone of a patient wherein the component projects into a bone cavity and is embedded into a plastic bone cement bonded to the bone and to the component such that a space is maintained between the component and inner wall faces of the bone; the improvement comprising the following steps: (a) vibrating a tool in the ultrasonic range; (b) contacting the plastic bone cement with the vibrating tool for at least locally softening the plastic bone cement; (c) introducing the vibrating tool into said plastic bone cement in said space whereby a path is cut by the vibrating tool in the plastic bone cement; (d) repeating the contacting and introducing steps for providing a plurality of paths; (e) removing plastic bone cement portions from between said paths for weakening the bond; and (f) subsequent to step (e), removing said component from said cavity.
Claim 2
Dependent Claim
157 words
In a method of dissolving the bond between an artificial prosthesis component and a bone of a patient wherein the component projects into a bone cavity and is embedded into a plastic bone cement bonded to the bone and to the component such that a space is maintained between the component and inner wall faces of the bone; the improvement comprising the following steps: (a) vibrating a tool in the ultrasonic range; (b) contacting the plastic bone cement with the vibrating tool for at least locally softening the plastic bone cement; (c) introducing the vibrating tool into said plastic bone cement in said space whereby a path is cut by the vibrating tool in the plastic bone cement; (d) repeating the contacting and introducing steps for providing a plurality of paths; (e) removing plastic bone cement portions from between said paths for weakening the bond; and (f) subsequent to step (e), removing said component from said cavity.
Claim 3
Dependent Claim
38 words
A method as defined in claim 1, further comprising the step of forcing melted plastic bone cement from the paths into a channel of the tool simultaneously with step (c) and emptying the plastic from the tool channel.
Claim 4
Dependent Claim
25 words
A method as defined in claim 1, wherein step (e) comprises the step of removing parts of said plastic bone cement with the vibrating tool.
Claim 5
Dependent Claim
176 words
In a method of dissolving the bond between an artificial prosthesis component and a bone of a patient, wherein the component projects into a bone cavity and is embedded into a plastic bone cement bonded to the bone and to the component such that a space is maintained between the component and inner wall faces of the bone; the improvement comprising the following steps: (a) vibrating a tool in the ultrasonic range; (b) contacting the plastic bone cement with the vibrating tool for at least locally softening the plastic bone cement; (c) introducing the vibrating tool into said plastic bone cement in said space; (d) subsequent to step (c), discontinuing the vibration of the tool while it is in an inserted state in the plastic bone cement; (e) subsequent to step (d), allowing the softened plastic bone cement to solidify and adhere to said tool; (f) subsequent to step (e), removing said tool from said cavity together with the plastic bone cement adhered thereto; and (g) subsequent to step (f), removing said component from said cavity.
Claim 6
Dependent Claim
176 words
In a method of dissolving the bond between an artificial prosthesis component and a bone of a patient, wherein the component projects into a bone cavity and is embedded into a plastic bone cement bonded to the bone and to the component such that a space is maintained between the component and inner wall faces of the bone; the improvement comprising the following steps: (a) vibrating a tool in the ultrasonic range; (b) contacting the plastic bone cement with the vibrating tool for at least locally softening the plastic bone cement; (c) introducing the vibrating tool into said plastic bone cement in said space; (d) subsequent to step (c), discontinuing the vibration of the tool while it is in an inserted state in the plastic bone cement; (e) subsequent to step (d), allowing the softened plastic bone cement to solidify and adhere to said tool; (f) subsequent to step (e), removing said tool from said cavity together with the plastic bone cement adhered thereto; and (g) subsequent to step (f), removing said component from said cavity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |