US4554683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective enclosure having self-contained air supply
Assignee: WONG Tech Inc
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Filing: 1981-01-21
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Granted: 1985-11-26
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Expires: 2001-01-21
Abstract
Abstract A protective enclosure fabricated from a clear, flexible, plastic material that, in the event of an emergency, is easily positionable over the head and upper body 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 top of the enclosure is sealed by a reinforced, relatively stiff closure member. Accordingly, an airspace containing a reserve air supply from which the wearer may breathe is created around the wearer's head. The bottom of the enclosure contains a fastener by which the enclosure may be securely tightened around the waist of the wearer. Each side of the enclosure includes an arm port through which the wearer's arms may extend. The arm ports are interfaced with an elastic material which is adapted to form an airtight seal around the wearer's arms when the arms are inserted therethrough. The protective enclosure may optionally have one or more filtering assemblies established therein through which the wearer may breathe in the event that the reserve air supply becomes exhausted. 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 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
2026-11-02 18:44
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: 10
Claim 1
Independent Claim
235 words
A flexible protective enclosure to protect a wearer from suffocation due to the presence of smoke and similar noxious fumes within a contaminated environment, said enclosure being closed at the top end thereof and being opened at the bottom end thereof so that said enclosure can be positioned over the head of the wearer, said enclosure top end being closed by a relatively rigid closure member comprising a seal by which the top edges of said enclosure are connected together, said seal extending across said enclosure top end, so that the corners thereof are substantially square for separating said top end from the head of the wearer, said enclosure including a pair of arm ports established therethrough and elastic sleeves aligned with respective arm ports at the interior of said enclosure for receiving the arms of the wearer therepast and for making an airtight seal therearound, said enclosure extending from above the head to the trunk at a location below the shoulders of the wearer and having fastening means by which to secure said enclosure to the wearer, such that said enclosure is spaced away from the wearer's head and trunk, so as to produce an airspace therearound in which a temporary supply of air is contained, said enclosure operating to prevent fluid communication between the contaminated environment and said airspace so that the wearer may breathe from said airspace while within the contaminated environment.
Claim 2
Dependent Claim
235 words
A flexible protective enclosure to protect a wearer from suffocation due to the presence of smoke and similar noxious fumes within a contaminated environment, said enclosure being closed at the top end thereof and being opened at the bottom end thereof so that said enclosure can be positioned over the head of the wearer, said enclosure top end being closed by a relatively rigid closure member comprising a seal by which the top edges of said enclosure are connected together, said seal extending across said enclosure top end, so that the corners thereof are substantially square for separating said top end from the head of the wearer, said enclosure including a pair of arm ports established therethrough and elastic sleeves aligned with respective arm ports at the interior of said enclosure for receiving the arms of the wearer therepast and for making an airtight seal therearound, said enclosure extending from above the head to the trunk at a location below the shoulders of the wearer and having fastening means by which to secure said enclosure to the wearer, such that said enclosure is spaced away from the wearer's head and trunk, so as to produce an airspace therearound in which a temporary supply of air is contained, said enclosure operating to prevent fluid communication between the contaminated environment and said airspace so that the wearer may breathe from said airspace while within the contaminated environment.
Claim 3
Dependent Claim
38 words
The protective enclosure recited in claim 1, further including a flap positioned over and covering a respective arm port at the exterior of said enclosure for preventing the contaminated environment from entering the enclosure through said arm port.
Claim 4
Dependent Claim
81 words
The protective enclosure recited in claim 1, wherein said enclosure comprises a hood portion and a skirt portion, said hook portion receiving therein the head of the wearer and being spaced from the head to form said airspace therearound, and said skirt portion extending to and being spaced from the trunk of the wearer at a location below the arms to form therearound a continuation of said airspace, said skirt portion being secured to the wearer's body by said fastening means.
Claim 5
Dependent Claim
29 words
The protective enclosure recited in claim 3, wherein said hood portion is fabricated from a material that is thicker than the material from which said skirt portion is fabricated.
Claim 6
Dependent Claim
43 words
The protective enclosure recited in claim 1, wherein said fastening means comprises a belt having first and second belt sections, said first and second belt sections being releasably interconnected to one another, whereby to secure said enclosure around the body of the wearer.
Claim 7
Dependent Claim
26 words
The protective enclosure recited in claim 5, wherein each of said belt sections includes VELCRO material, whereby said sections may be releaseably interconnected to one another.
Claim 8
Dependent Claim
23 words
The protective enclosure recited in claim 1, including at least one filter means established in said enclosure through which the user may breathe.
Claim 9
Dependent Claim
155 words
A clear, flexible protective envelope to be worn over the body of a wearer while within a contaminated environment, such as that containing smoke, or the like, said envelope comprising: arms ports established in said envelope, so that the arms of the wearer can be extended therethrough, elastic sleeves aligned with respective arm ports for receiving the arms of the wearer therethrough and for making an air-tight seal therearound, means positioned over and covering respective arm ports for preventing the contaminated environment from entering the envelope through said arm ports, fastening means by which to secure said envelope to the body of the wearer and for making an air-tight seal therearound, and means by which to shape said envelope so as to provide an air space around the head of the wearer, in which air space a temporary supply of air is contained and from which the wearer may breathe while within the contaminated environment.
Claim 10
Dependent Claim
155 words
A clear, flexible protective envelope to be worn over the body of a wearer while within a contaminated environment, such as that containing smoke, or the like, said envelope comprising: arms ports established in said envelope, so that the arms of the wearer can be extended therethrough, elastic sleeves aligned with respective arm ports for receiving the arms of the wearer therethrough and for making an air-tight seal therearound, means positioned over and covering respective arm ports for preventing the contaminated environment from entering the envelope through said arm ports, fastening means by which to secure said envelope to the body of the wearer and for making an air-tight seal therearound, and means by which to shape said envelope so as to provide an air space around the head of the wearer, in which air space a temporary supply of air is contained and from which the wearer may breathe while within the contaminated environment.
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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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |