US3881477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid discharge appliance for maintaining a sterile enclosure
Assignee: Individual
•
Filing: 1973-08-07
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Granted: 1975-05-06
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Expires: 1993-08-07
Abstract
Abstract A hollow tubular member of endless configuration in plan, defines an access opening or window and is supported at a level above a suitable supporting surface for the body of a patient. Conduits are provided for delivering into the hollow member, a constant flow of fluid at super atmospheric pressure, the fluid being at a controlled temperature and humidity and fully sterilized and, if desired, having a suitable medicament entrained therein. The member is formed with a first series of substantially contiguous fluid discharge ports, surrounding the access opening and discharging the fluid as a continuous, upwardly directed, convergent fluid shield over and around the access opening and is formed with a second series of substantially contiguous, downwardly directed fluid discharge ports, discharging the fluid as a downwardly directed fluid shield, also completely surrounding the access opening.
Inventors
- 👤 Otto Robert E Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
A; A61; A61B; A61B90/00; A61B90/40; A61B2090/401
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A surgical appliance for application to a living body to maintain a protective fluid shield for isolating an area of said body from the surrounding atmosphere, comprising: means defining a supporting surface for said body; a hollow tubular member of endless configuration in plan surrounding an access opening and supported at a level above said surface; means communicating with said member for delivering into said member a constant flow of fluid at super atmospheric pressure; said member being formed with a first series of substantially contiguous upwardly and inwardly directed fluid discharge ports, completely surrounding said access opening and discharging said fluid as a continuous, upwardly directed and convergent fluid shield over and completely around said access opening; said member being formed with a second series of substantially contiguous, downwardly directed discharge ports for discharging said fluid as a continuous, downwardly directed fluid shield completely around said access opening.
Claim 2
Dependent Claim
149 words
A surgical appliance for application to a living body to maintain a protective fluid shield for isolating an area of said body from the surrounding atmosphere, comprising: means defining a supporting surface for said body; a hollow tubular member of endless configuration in plan surrounding an access opening and supported at a level above said surface; means communicating with said member for delivering into said member a constant flow of fluid at super atmospheric pressure; said member being formed with a first series of substantially contiguous upwardly and inwardly directed fluid discharge ports, completely surrounding said access opening and discharging said fluid as a continuous, upwardly directed and convergent fluid shield over and completely around said access opening; said member being formed with a second series of substantially contiguous, downwardly directed discharge ports for discharging said fluid as a continuous, downwardly directed fluid shield completely around said access opening.
Claim 3
Dependent Claim
50 words
A surgical appliance as defined in claim 1, wherein said member is formed with a third series of substantially contiguous upwardly and outwardly directed fluid discharge ports, surrounding said first series of fluid discharge ports and discharging said fluid as a continuous, upwardly directed, supplemental fluid shield around said opening.
Claim 4
Dependent Claim
35 words
A surgical appliance as defined in claim 1 in which said supporting surface is of rectangular configuration, and said member is of similar configuration, above and in substantial registry with the periphery of said surface.
Claim 5
Dependent Claim
52 words
A surgical appliance as defined in claim 2, wherein each said series of discharge ports is defined by inner and outer adjoining rows of slots, establishing communication between the interior of said member and the atmosphere, the ports of said respective rows being closely adjacent and in staggered relation with each other.
Claim 6
Dependent Claim
15 words
A surgical appliance as defined in claim 1, wherein said member is of rigid construction.
Claim 7
Dependent Claim
15 words
A surgical appliance as defined in claim 5, wherein said member is of transparent material.
Claim 8
Dependent Claim
58 words
A surgical appliance as defined in claim 1, wherein the means for delivering into said member a constant flow of fluid, at super atmospheric pressure, comprises a plurality of fluid supply conduits, communicating with the interior of said hollow member at relatively spaced locations, whereby to substantially equalize the rate of discharge of fluid through the respective slots.
Claim 9
Dependent Claim
50 words
A surgical appliance as defined in claim 1, wherein said member is of rigid construction and of polygonal configuration in plan, said first series of fluid discharge ports being arranged in corresponding polygonal configuration, whereby the said fluid discharged through said ports defines a fluid shield of generally pyramidal shape.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |