US3580248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bivalved cast
Assignee: Individual
•
Filing: 1968-12-02
•
Granted: 1971-05-25
•
Expires: 1988-12-02
Abstract
Abstract A cast for immobilizing broken limbs which includes a pair of bivalved shells, an inflatable liner in each of the shells, an absorbent liner or padding, and means for releasably securing the bivalved shells together. The cast is reuseable, permits convenient visual inspection of the broken limb without destruction of the cast, and provides for adjustment of the volume of the inside cavity and the pressure on the immobilized limb through adjustment of the inflatable liners.
Inventors
- 👤 Leighton W Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:01
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/04; A61F5/05; A61F5/058; A61F5/05816; Y; Y10; Y10S; Y10S128/00; Y10S128/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
142 words
A bivalved cast comprising: a first and second rigid shell corresponding in configuration to the body portion to be immobilized, each of said shells having a generally channeled-shaped cross section and mating edges which define a plane passing through the longitudinal axis of said body portion; first and second inflatable liner disposed in said first and second rigid shells, respectively, and extending over substantially the entire inner surface thereof; first and second means exterior of said first and second rigid shells for introducing air into said first and second inflatable liners, respectively; a first and second layer of absorbent material adapted to engage said body portion disposed inwardly of said first and second inflatable liners, respectively; and means releasably joining said first and second rigid shells at said mating edges to thereby form a cast conforming in configuration to said body portion.
Claim 2
Dependent Claim
142 words
A bivalved cast comprising: a first and second rigid shell corresponding in configuration to the body portion to be immobilized, each of said shells having a generally channeled-shaped cross section and mating edges which define a plane passing through the longitudinal axis of said body portion; first and second inflatable liner disposed in said first and second rigid shells, respectively, and extending over substantially the entire inner surface thereof; first and second means exterior of said first and second rigid shells for introducing air into said first and second inflatable liners, respectively; a first and second layer of absorbent material adapted to engage said body portion disposed inwardly of said first and second inflatable liners, respectively; and means releasably joining said first and second rigid shells at said mating edges to thereby form a cast conforming in configuration to said body portion.
Claim 3
Dependent Claim
27 words
The cast of claim 1 wherein said first and second inflatable liners confine air under pressure in the range of 75 to 95 percent of diastolic pressure.
Claim 4
Dependent Claim
46 words
The cast of claim 2 wherein said mating edges on one side of said rigid shells are hinged together to thereby allow opening of one of said rigid shells with respect to the other for visual access to said body portion without destruction of said cast.
Claim 5
Dependent Claim
18 words
The cast of claim 3 wherein said first and second rigid shells are formed of rigid plastic material.
Claim 6
Dependent Claim
31 words
The cast of claim 4 and means for preventing lateral movement of said first rigid shell with respect to said second rigid shell when said shells are secured in mating relationship.
Claim 7
Dependent Claim
23 words
The cast of claim 5 wherein said first and second inflatable liners are adhesively secured to said first and second rigid shells, respectively.
Claim 8
Dependent Claim
25 words
The cast of claim 6 wherein said first and second layer of absorbent material is adhesively secured to said first and second inflatable liners, respectively.
Claim 9
Dependent Claim
21 words
The cast of claim 7 and check valve means for allowing introduction of air into said liners and preventing deflation thereof.
References Cited (Backward Citations)
US3032033A
Cited
US3351055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |