US3923049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthopedic cast and method of constructing same
Assignee: Individual
•
Filing: 1974-06-28
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Granted: 1975-12-02
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Expires: 1994-06-28
Abstract
Abstract An improved plaster cast and method of preparing it from a plaster blank are provided by the present invention. A first sheet of resilient, deformable, water absorptive material is placed on a supporting surface and one or more plaster splints are aligned with the sheet. A second sheet of deformable, water absorptive, fibrous material is placed over the splints and the first sheet thus sandwiching the plastic splints between the two sheets. The edges of the sheets are joined together to form the casting blank. When used, the casting blank is saturated with water so as to wet out the plaster splints. To this end the highly water absorptive sheets facilitate transfer of the water to the plaster splints. The first sheet is characterized by a non-affinity for the plaster while the second sheet readily absorbs the plaster. The fibrous nature of the second sheet provides substantial reinforcing for the plaster as the latter hardens. After saturation of the blank, it is shaped around the portion of the body to be supported to form the cast. The cast may be held in place while drying by adhesive or elastic tape.
Inventors
- 👤 Leo E Lauber
- 👤 Ernest A Cowden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:05
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A method of constructing a casting blank from which a plaster cast for a portion of the body may be formed, said method comprising: providing first and second sheets of deformable water absorptive material, at least one of said sheets being fibrous material characterized by an affinity for moistened plaster, the other of said sheets comprising a cellular material characterized by a non-affinity for moistened plaster; placing a quantity of plaster between said first and second sheets; and joining said first and second sheets together to enclose said plaster material therebetween.
Claim 2
Independent Claim
91 words
A method of constructing a casting blank from which a plaster cast for a portion of the body may be formed, said method comprising: providing first and second sheets of deformable water absorptive material, at least one of said sheets being fibrous material characterized by an affinity for moistened plaster, the other of said sheets comprising a cellular material characterized by a non-affinity for moistened plaster; placing a quantity of plaster between said first and second sheets; and joining said first and second sheets together to enclose said plaster material therebetween.
Claim 3
Dependent Claim
24 words
A method as set forth in claim 1, wherein the step of placing a quantity of plaster comprises placing a quantity of plaster splints.
Claim 4
Dependent Claim
114 words
A casting blank for use in forming a plaster cast for a portion of the body, said blank comprising: a first sheet of deformable water absorptive material; a layer of plaster material disposed on said first sheet; and a second sheet of deformable water absorptive material disposed in overlying relation to said plaster material to sandwich the latter between said first and second sheets, at least one of said sheets comprising a fibrous material characterized by an affinity for moistened plaster, the other of said sheets comprising a cellular material characterized by a non-affinity for moistened plaster, said first and second sheets being joined together at their peripheral edges to enclose said plaster therebetween.
Claim 5
Dependent Claim
114 words
A casting blank for use in forming a plaster cast for a portion of the body, said blank comprising: a first sheet of deformable water absorptive material; a layer of plaster material disposed on said first sheet; and a second sheet of deformable water absorptive material disposed in overlying relation to said plaster material to sandwich the latter between said first and second sheets, at least one of said sheets comprising a fibrous material characterized by an affinity for moistened plaster, the other of said sheets comprising a cellular material characterized by a non-affinity for moistened plaster, said first and second sheets being joined together at their peripheral edges to enclose said plaster therebetween.
Claim 6
Dependent Claim
15 words
The invention of claim 3, wherein said plaster layer comprises a plurality of plaster splints.
Claim 7
Independent Claim
114 words
A method of providing a lumbar support utilizing a casting blank formed from a quantity of plaster enclosed within a water absorptive deformable material, and a belt having a pocket for receiving a rigid cast, said method comprising the steps of: saturating said blank with water; shaping the saturated blank to the lumbar region to be supported; removing the shaped blank from the body; curing the saturated blank to form a rigid cast; placing the rigid cast in said pocket; and positioning the belt with the cast contained in the pocket tightly around the waist of the wearer with said cast disposed at approximately the same location as its location during said shaping step.
Claim 8
Independent Claim
114 words
A method of providing a lumbar support utilizing a casting blank formed from a quantity of plaster enclosed within a water absorptive deformable material, and a belt having a pocket for receiving a rigid cast, said method comprising the steps of: saturating said blank with water; shaping the saturated blank to the lumbar region to be supported; removing the shaped blank from the body; curing the saturated blank to form a rigid cast; placing the rigid cast in said pocket; and positioning the belt with the cast contained in the pocket tightly around the waist of the wearer with said cast disposed at approximately the same location as its location during said shaping step.
Claim 9
Dependent Claim
21 words
A method as set forth in claim 5, wherein said saturating step comprises submerging said blank in water for 20-40 seconds.
Claim 10
Dependent Claim
25 words
A method as set forth in claim 6, wherein is included, prior to said shaping step, the step of removing excess water from said blank.
References Cited (Backward Citations)
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |