Patent US3600680A successfully refreshed from Google Patents.
Patent US4502157A successfully refreshed from Google Patents.
US4502157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective enclosures having self-contained air supply
Assignee: WONG Tech Inc
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Filing: 1981-05-27
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Granted: 1985-03-05
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Expires: 2001-05-27
Abstract
Abstract A protective enclosure fabricated from a clear, flexible, plastic material that, in the event of an emergency, is easily positionable over at least the head of a wearer to protect the wearer from the adverse effects of a contaminated environment, such as that filled with smoke or similar noxious fumes. The enclosure is provided with an opened side for receiving therethrough the head of the wearer. The ends of the enclosure which define the opened side thereof are structured so as to generally conform to the shape of a human chest. The aforementioned ends which define the opened side are provided with fastening means by which the opened side may, be secured to the chest of the wearer in order to form an airtight fit therebetween and thereby close the opened end against the chest and around the neck of the wearer. Hence, a relatively low cost, reliable, and easily operable protective enclosure is provided that can be folded and conveniently placed in a pouch for either storage or distribution, such as to the occupants of a high-rise building or to passengers of an airplane for use in the event of fire, or similar catastrophe.
Inventors
- 👤 Albert H. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
A; A62; A62B; A62B17/00; A62B17/04; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1107; A41D13/1153
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
A flexible, gas-tight protective enclosure to be worn over at least the head and some of the chest of a wearer within a contaminated environment to provide the wearer with a temporary supply of air from which to breathe, said enclosure having an opened end for receipt therethrough of the wearer's head and chest and a closed end to be spaced away from the wearer's head and chest and disposed forward of said closed end, said opened end having walls of flexible construction and associated fastening means by which to make a gas-tight closure of said opened end against the chest of the wearer, such that an airspace containing the temporary supply of air is provided between the wearer's chest and said closed enclosure end and around the wearer's head, said gas-tight enclosure isolating the wearer's head within said airspace from fluid communication with the contaminated environment exterior of said enclosure to permit the wearer of said enclosure to breathe while within the contaminated environment.
Claim 2
Dependent Claim
165 words
A flexible, gas-tight protective enclosure to be worn over at least the head and some of the chest of a wearer within a contaminated environment to provide the wearer with a temporary supply of air from which to breathe, said enclosure having an opened end for receipt therethrough of the wearer's head and chest and a closed end to be spaced away from the wearer's head and chest and disposed forward of said closed end, said opened end having walls of flexible construction and associated fastening means by which to make a gas-tight closure of said opened end against the chest of the wearer, such that an airspace containing the temporary supply of air is provided between the wearer's chest and said closed enclosure end and around the wearer's head, said gas-tight enclosure isolating the wearer's head within said airspace from fluid communication with the contaminated environment exterior of said enclosure to permit the wearer of said enclosure to breathe while within the contaminated environment.
Claim 3
Dependent Claim
42 words
The flexible gas-tight protective enclosure recited in claim 1, wherein said closed enclosure end has a relatively rigid member associated therewith so as to prevent a collapse of said closed end and preserve the airspace formed around the head of the wearer.
Claim 4
Dependent Claim
39 words
The flexible, gas-tight protective enclosure recited in claim 1, wherein the flexible walls of said opened enclosure end have a contour so as to conform to the shape of the wearer's chest for forming a secure, gas-tight fit thereagainst.
Claim 5
Dependent Claim
38 words
The flexible, gas-tight protective enclosure recited in claim 1, further having a collar arranged along said opened enclosure end, said collar being received around the neck of the wearer when said enclosure is worn within the contaminated environment.
Claim 6
Dependent Claim
44 words
The flexible, gas-tight protective enclosure recited in claim 1, wherein the fastening means associated with said opened enclosure end surrounds the wearer's body at a location below the shoulders for forming a gas-tight closure of said opened end against the chest of the wearer.
Claim 7
Dependent Claim
34 words
The flexible, gas-tight protective enclosure recited in claim 1, wherein said opened enclosure end has a sufficient length to be extended to and closed against an area of the wearer's body adjacent the hips.
Claim 8
Dependent Claim
20 words
The flexible, gas-tight protective enclosure recited in claim 1, wherein said enclosure is fabricated from a clear, flexible plastic material.
Claim 9
Dependent Claim
45 words
The flexible, gas-tight protective enclosure recited in claim 1, further having a top and a bottom extending between said opened and closed enclosure ends for separating said closed end from said opened end and positioning said closed end forward of and opposite said closed end.
Claim 10
Dependent Claim
47 words
The flexible, gas-tight protective enclosure recited in claim 8, wherein said enclosure top and said opened enclosure end are aligned adjacent one another to form a continuous portion of said enclosure from the head to a location below the shoulders and above the waist of the wearer.
Claim 11
Dependent Claim
26 words
The flexible, gas-tight protective enclosure recited in claim 1, wherein said airspace between the wearer's chest and the closed enclosure end has a generally conical configuration.
Claim 12
Dependent Claim
39 words
The flexible, gas-tight protective enclosure recited in claim 1, wherein the fastening means associated with said opened enclosure end includes a drawstring connected to said opened end and surrounding a least some of the wearer's trunk below the shoulders.
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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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |