Patent US3602212A successfully refreshed from Google Patents.
US3602212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical operating theatre with sterile air admitting means
Assignee: James Howorth and Co Ltd
•
Filing: 1969-04-28
•
Granted: 1971-08-31
•
Expires: 1989-04-28
Abstract
Abstract A method an apparatus for carrying out surgical operations in which the operation is carried out in a transparent chamber or cubicle of a size to house the operating team and patient and through which a vertically downward fan actuated flow of sterile air passes and is changed some 300 times per hour and in which the air is introduced through tubes of porous textile material the pores in which contract when the fan is stopped to prevent contaminated air from reentering the tubes through the fabric.
Inventors
- 👤 Frederick H Howorth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:54
CPC Classifications
A; A61; A61G; A61G13/00; A61G13/10; A61G13/108
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
An operating theater that comprises a chamber having ceiling means, sidewalls depending therefrom and a floor, said ceiling means having defined therein an opening for the admission of sterile air into the chamber, means mounting an air conditioning plant at said opening comprising porous textile tube means extending over said opening, said tube means being connected to a fan adapted to supply sterile air under pressure into said tube means, wherein said porous tube means under pressure is expanded permitting air to pass through the pores downward into the chamber, said tube means preventing backflow of air when the fan is stopped due to contraction of the pores, and said chamber having means permitting exhaust of pressurized air at the lower end of at least one of said sidewalls so that air from said tube means is unidirectionally, continuously passed downwardly through said chamber when the fan is in operation.
Claim 2
Dependent Claim
150 words
An operating theater that comprises a chamber having ceiling means, sidewalls depending therefrom and a floor, said ceiling means having defined therein an opening for the admission of sterile air into the chamber, means mounting an air conditioning plant at said opening comprising porous textile tube means extending over said opening, said tube means being connected to a fan adapted to supply sterile air under pressure into said tube means, wherein said porous tube means under pressure is expanded permitting air to pass through the pores downward into the chamber, said tube means preventing backflow of air when the fan is stopped due to contraction of the pores, and said chamber having means permitting exhaust of pressurized air at the lower end of at least one of said sidewalls so that air from said tube means is unidirectionally, continuously passed downwardly through said chamber when the fan is in operation.
Claim 3
Dependent Claim
13 words
The operating theater defined in claim 1, wherein said walls are mainly transparent.
Claim 4
Dependent Claim
37 words
The operating theater defined in claim 1, wherein the lower portion of at least one sidewall is a flexible sheet depending from a more rigid upper wall portion and having its free lower edge near the floor.
References Cited (Backward Citations)
US3265059A
Cited
US3380369A
Cited
US3363532A
Cited
US3492987A
Cited
US3501213A
Cited
US3505989A
Cited
US3511162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |