US4228792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exsanguinating device for displacing blood from a limb by compression
Assignee: Individual
•
Filing: 1978-09-20
•
Granted: 1980-10-21
•
Expires: 1998-09-20
Abstract
Abstract An exsanguinating device for displacing blood from a limb by compression comprises a fluid-filled envelope in the form of a double-walled tube of elastomer with the inner and outer walls of the same unstressed dimensions. The device can roll onto the limb with the inner and outer walls exchanging positions. The inner surface of the envelope is preferably lubricated to prevent sticking where the inner wall folds at the ends. When a liquid fill is used this can serve as the lubricant.
Inventors
- 👤 Noel C. Rhys-Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:44
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/132; A61B17/1322; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A device for exsanguinating a limb comprising a double-walled elongated cylindrical tubular body of elastomeric material of which the inner and outer walls have substantially the same unstressed dimensions and are interconnected solely at their ends to form a continuous envelope which is filled with a fluid under pressure so that the fluid pressure distends the outer wall and partially collapses and expands the inner wall inwardly to substantially fill the inner space, wherein the outer surface of the envelope is free of protrusions such that as a limb is inserted in either end of the tubular body the inner and outer walls constantly exchange positions and the inner wall will progressively compress the limb by virtue of the pressure of the contained fluid.
Claim 2
Independent Claim
124 words
A device for exsanguinating a limb comprising a double-walled elongated cylindrical tubular body of elastomeric material of which the inner and outer walls have substantially the same unstressed dimensions and are interconnected solely at their ends to form a continuous envelope which is filled with a fluid under pressure so that the fluid pressure distends the outer wall and partially collapses and expands the inner wall inwardly to substantially fill the inner space, wherein the outer surface of the envelope is free of protrusions such that as a limb is inserted in either end of the tubular body the inner and outer walls constantly exchange positions and the inner wall will progressively compress the limb by virtue of the pressure of the contained fluid.
Claim 3
Dependent Claim
20 words
A device as claimed in claim 1 having a self-sealing valve for filling of the envelope with gas under pressure.
Claim 4
Dependent Claim
31 words
A device as claimed in claim 1 or 2 in which the inner surface of the envelope is coated with a lubricant to prevent sticking of the envelope at its ends.
Claim 5
Dependent Claim
35 words
A device as claimed in claim 1 in which the envelope is filled with a liquid and sealed, the liquid being such as to serve as a lubricant for the inner surface of the envelope.
Claim 6
Dependent Claim
24 words
A method of exsanguinating a limb wherein said limb is inserted into a device in accordance with claim 1 to effect progressive compression thereof.
Claim 7
Dependent Claim
35 words
A method as claimed in claim 5 in which a tourniquet cuff is inflated to exert pressure on said limb after the limb has been inserted into the device and the device is thereafter removed.
References Cited (Backward Citations)
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Cited
US2068173A
Cited
US2943859A
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US3186404A
Cited
US3282414A
Cited
US3678936A
Cited
US4153054A
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |