Patent CA1112803A successfully refreshed from Google Patents.
CA1112803A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Internal fracture plate assembly with releasing feature
Assignee: Individual
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Filing: 1978-10-31
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Granted: 1981-11-24
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Expires: 1998-10-31
Abstract
Abstract TITLE: INTERNAL FRACTURE PLATE ASSEMBLY WITH RELEASING FEATURE Abstract of the Disclosure A fracture plate assembly for fixation of bone fractures during a normal period of healing, including a permanent plate having front and back faces. At least one aperture is formed through the plate between its front and back faces to receive a metal pin or screw which anchors the plate to the bone. A nonmetallic member is interposed between the plate, the pins or screws, and the bone. This is in the form of a layer or gasket of material that is deformable following a normal healing period to release the mechanical engagement between the plate and the pins or screws. A preferred form utilizes a layer of silicone rubber interposed between the plate and the bone.
Inventors
- 👤 George W. Bagby
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
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Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
169 words
An internal fracture plate assembly with releasing feature, said assembly being adapted to reinforce bone fragments during healing of a bone fracture in a live body, comprising: a permanent structural plate of rigid material capable of withstanding normal bone loadings when fixed to bone fragments in a position overlying said fracture; said plate having a plurality of apertures formed through it; screw means for threadably engaging the bone fragments while said screw means is in engagement with the boundaries of the apertures formed through the plate for operatively securing the plate to the bone fragments by compressive engagement between the screw means and the plate; and release means in the form of a layer of material in con-tact with said plate for maintaining the compressive engagement between the screw means and the plate during the normal healing period and for gradually releasing such compressive engagement subsequent to the normal healing period for the fracture, leaving the screw means and plate adjacent to the bone in a loosened mechanical interconnection.
Claim 2
Dependent Claim
169 words
An internal fracture plate assembly with releasing feature, said assembly being adapted to reinforce bone fragments during healing of a bone fracture in a live body, comprising: a permanent structural plate of rigid material capable of withstanding normal bone loadings when fixed to bone fragments in a position overlying said fracture; said plate having a plurality of apertures formed through it; screw means for threadably engaging the bone fragments while said screw means is in engagement with the boundaries of the apertures formed through the plate for operatively securing the plate to the bone fragments by compressive engagement between the screw means and the plate; and release means in the form of a layer of material in con-tact with said plate for maintaining the compressive engagement between the screw means and the plate during the normal healing period and for gradually releasing such compressive engagement subsequent to the normal healing period for the fracture, leaving the screw means and plate adjacent to the bone in a loosened mechanical interconnection.
Claim 3
Dependent Claim
24 words
The apparatus set out in claim 1 wherein the layer of material is adapted to be interposed between the plate and the bone fragments.
Claim 4
Dependent Claim
25 words
The apparatus as set out in claim 1 wherein the layer of material is adapted to be interposed between the plate and said screw means.
Claim 5
Dependent Claim
34 words
The apparatus as set out in claim 1 wherein the layer of material has the characteristic of exhibiting reversion when maintained in close confinement at a normal range of body temperature for said body.
Claim 6
Dependent Claim
47 words
The apparatus as set out in claim 1 wherein the plate is a compression bone plate having slotted apertures including distal ends located toward the plate ends to create compressive opposition of fractures by engagement of said screw means at the distal ends of the slotted apertures.
Claim 7
Dependent Claim
52 words
The apparatus set out in claim 1 wherein said screw means comprises: a threaded shank; an enlarged integral head at one end of said shank having outwardly facing surface areas for engagement within the apertures of said plate; said release means being bonded to the outwardly facing sur-face areas of said head.
Claim 8
Dependent Claim
43 words
The apparatus set out in claim 1 wherein said plate comprises: a metal member having a surface adapted to conform longi-tudinally to the bone fragments; a plurality of apertures formed perpendicularly to said surface; said release means being in contact with said surface.
Claim 9
Dependent Claim
20 words
An apparatus as set out in claim 7 wherein said release means is fixed to said surface of the member.
Claim 10
Dependent Claim
26 words
An apparatus as set out in claim 7 wherein said release means is fixed to the plate and covers the surface areas of said plate apertures.
Claim 11
Dependent Claim
15 words
An apparatus as set out in claim 7 wherein said release means encapsulates said member.
Claim 12
Dependent Claim
19 words
An apparatus as set out in claim 1 wherein the release means comprises a layer of silicone rubber material.
Claim 13
Dependent Claim
20 words
An apparatus as set out in claim 1 wherein the release means comprises a layer of "Silastic" silicone rubber material.
References Cited (Backward Citations)
No citation records indexed.
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