US5389323A
Expired / Lapsed
US
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Method of fabricating a quasi-isotropic apparatus
Assignee: Individual
•
Filing: 1993-09-07
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Granted: 1995-02-14
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Expires: 2013-09-07
Abstract
Abstract A method of forming an Ilizarov ring includes forming two half rings, each of which comprises a length of resin impregnated cloth. Cloth is pre-impregnated with a resin and then wound to provide a plurality of layers in a three dimensional orientation, and then the resin impregnated cloth is placed in a mold. After the resin impregnated cloth is pressed and cured in the mold, the material is removed from the mold and is appropriately machined. Two half rings are secured together to form a single ring.
Inventors
- 👤 Richard L. Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:46
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/60; A61B17/62
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
The method of fabricating an Ilizarov ring, comprising, in combination, the steps of: providing a length of woven cloth having a warp, a woof, and a bias; impregnating the length of cloth with a thermosetting resin; cutting a rectangular strip from the impregnated cloth; winding the impregnated strip of cloth to provide a multi-layered spiral laminate; providing a mold having a cavity of a desired configuration; forming the multi-layered cloth laminate into the configuration of the mold cavity wherein a multilayered spiral box beam is formed; placing the laminate in the mold cavity; curing the cloth laminate in the mold cavity; removing the cured laminate from the mold cavity; and machining the cured laminate to provide an Ilizarov ring.
Claim 2
Independent Claim
119 words
The method of fabricating an Ilizarov ring, comprising, in combination, the steps of: providing a length of woven cloth having a warp, a woof, and a bias; impregnating the length of cloth with a thermosetting resin; cutting a rectangular strip from the impregnated cloth; winding the impregnated strip of cloth to provide a multi-layered spiral laminate; providing a mold having a cavity of a desired configuration; forming the multi-layered cloth laminate into the configuration of the mold cavity wherein a multilayered spiral box beam is formed; placing the laminate in the mold cavity; curing the cloth laminate in the mold cavity; removing the cured laminate from the mold cavity; and machining the cured laminate to provide an Ilizarov ring.
Claim 3
Dependent Claim
23 words
The method of claim 1 in which the step of cutting the strip includes a step of cutting the cloth on the bias.
Claim 4
Dependent Claim
28 words
The method of claim 1 in which the step of machining the cured cloth ring includes the step of drilling a plurality of apertures through the cured laminate.
Claim 5
Dependent Claim
36 words
The method of claim 3 in which the step of providing a mold includes the step of placing ejector pins in the mold at desired locations where the apertures will be drilled through the cured laminate.
Claim 6
Dependent Claim
28 words
The method of claim 1 in which the step of winding the impregnated cloth comprises the step of providing about twenty layers of cloth in the spiral laminate.
Claim 7
Dependent Claim
28 words
The method of claim 1 in which the step of curing the laminate in the mold includes the step of the laminate assuming a generally rectangular cross-sectional configuration.
Claim 8
Dependent Claim
26 words
The method of claim 6 in which the step of the laminate assuming a generally rectangular cross-sectional configuration includes the step of applying heat and pressure.
Claim 9
Independent Claim
87 words
A method of making a three dimensional quasi-isotropic laminated structure, comprising, in combination, the steps of: providing a length of woven cloth having a warp, a woof, and a bias; impregnating the cloth with a resin; winding the impregnated cloth to provide a laminate having a spiral crossectional configuration; providing a mold having a cavity of a desired configuration wherein a spiral box beam laminate is formed; placing the laminate in the cavity; curing the laminate in the mold; and removing the cured laminate from the mold.
Claim 10
Independent Claim
87 words
A method of making a three dimensional quasi-isotropic laminated structure, comprising, in combination, the steps of: providing a length of woven cloth having a warp, a woof, and a bias; impregnating the cloth with a resin; winding the impregnated cloth to provide a laminate having a spiral crossectional configuration; providing a mold having a cavity of a desired configuration wherein a spiral box beam laminate is formed; placing the laminate in the cavity; curing the laminate in the mold; and removing the cured laminate from the mold.
Claim 11
Dependent Claim
30 words
The method of claim 8 in which the step of winding the impregnated cloth includes the step of cutting the impregnated cloth on the bias to provide a rectangular strip.
Claim 12
Dependent Claim
35 words
The method of claim 9 in which the step of curing the laminate in the mold includes the step of the laminate assuming a generally rectangular configuration to define a three dimensional quasi-isotropic laminated structure.
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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) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |