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US 4,683,880 AGranted
Toxic fume protective hood and method of construction
AssigneeE. I. Du Pont de Nemours and Company
InventorBertil Werjefelt
Life of this patent
Estimating the term…
Abstract
A smoke hood is provided which is highly compact, quickly assembled, and light-weight. The device is defined by a tubular, transparent portion made from KAPTON, having a closed upper end and a lower skirt portion adapted to fit over at least the head of a user. A neck seal is attached to the interior of the tube and is designed to allow the user to quickly put on the hood without allowing any of the outside environment to flow into the hood. Inflow and outflow valves are attached to the hood the former of which connects to an air supply system. A method for assembling the hood is also provided along with details of an inflow valve arrangement, an outflow valve arrangement, and a kink-free air supply hose structure.
Claims11
A smoke hood for protecting the user of said hood from fire and inhalation of a noxious surrounding environment, said smoke hood comprising
- (a) a generally tubular portion having open upper and lower ends and a continuous sidewall having inner and outer side surfaces, said generally tubular portion being comprised of a fire-resistant and gas-impermeable transparent film;
- (b) a first reflective strip located on the outer side of said continuous sidewall adjacent to said upper end;
- (c) a second reflective strip located on the outer side of said continuous wall adjacent to said lower end;
- (d) a generally circular hood portion, the peripheral edges of which are secured to the tubular portion, comprised of said fire-resistant and gas-impermeable film, said circular hood portion being connected to the upper end of said tubular portion;
- (e) a substantially annular, resilient neck seal, the peripheral edges of which are secured to the tubular portion, attached to the inner side portion of the lower end of said tubular portion, said neck seal having an opening for admitting at least the head of a user into said smoke hood to form an air-tight closure around said user, said neck seal being attached to the inner side portion of the lower end of said tubular portion sufficiently above the lower edge to form a protective skirt for the body of the user;
- (f) an inflow valve attached to said smoke hood and adapted to be connected to a hose that communicates with an air supply system in order to conduct fresh air to the interior of said hood;
- and
- (g) an outflow valve attached to said smoke hood and adapted to permit air to escape from the hood with increased internal pressure inside the hood, and wherein said tubular portion and said circular hood portion are distinct elements adhesively attached to each other by double-sided tape of fire-resistant and gas-impermeable transparent material.
5 more elements
A smoke hood for protecting the user of said hood from fire and inhalation of a noxious surrounding environment, said smoke hood comprising:
- (a) a generally tubular portion having open upper and lower ends and a continuous sidewall having inner and outer side surfaces, said generally tubular portion being comprised of a fire-resistant and gas-impermeable transparent film;
- (b) a first reflective strip located on the outer side of said continuous sidewall adjacent to said upper end;
- (c) a second reflective strip located on the outer side of said continuous wall adjacent to said lower end;
- (d) a generally circular hood portion, the peripheral edges of which are secured to the tubular portion, comprised of said fire-resistant and gas-impermeable film, said circular hood portion being connected to the upper end of said tubular portion;
- (e) a substantially annular, resilient neck seal, the peripheral edges of which are secured to the tubular portion, attached to the inner side portion of the lower end of said tubular portion, said neck seal having an opening for admitting at least the head of a user into said smoke hood to form an air-tight closure around said user, said neck seal being attached to the inner side portion of the lower end of said tubular portion sufficiently above the lower edge to form a protective skirt for the body of the user;
- (f) an inflow valve attached to said smoke hood and adapted to be connected to a hose that communicates with an air supply system in order to conduct fresh air to the interior of said hood;
- and
- (g) an outflow valve attached to said smoke hood and adapted to permit air to escape from the hood with increased internal pressure inside the hood, and wherein said tubular portion and said circular hood portion are distinct elements adhesively attached to each other by double sided tape of fire-resistant and gas-impermeable transparent material and wherein the double-sided tape is Kapton.RTM. polyimide.
5 more elements
A smoke hood for protecting the user of said hood from fire and inhalation of a noxious surrounding environment, said smoke hood comprising:
- (a) a generally tubular portion having open upper and lower ends and a continuous sidewall having inner and outer side surfaces, said generally tubular portion being comprised of a fire-resistant and gas-impermeable transparent film;
- (b) a first reflective strip located on the outer side of said continuous sidewall adjacent to said upper end;
- (c) a second reflective strip located on the outer side of said continuous wall adjacent to said lower end;
- (d) a generally circular hood portion, the peripheral edges of which are secured to the tubular portion, comprised of said fire-resistant and gas-impermeable film, said circular hood portion being connected to the upper end of said tubular portion;
- (e) a substantially annular, resilient neck seal, the peripheral edges of which are secured to the tubular portion, attached to the inner side portion of the lower end of said tubular portion, said neck seal having an opening for admitting at least the head of a user into said smoke hood to form an air-tight closure around said user, said neck seal being attached to the inner side portion of the lower end of said tubular portion sufficiently above the lower edge to form a protective skirt for the body of the user;
- (f) an inflow valve attached to said smoke hood and adapted to be connected to a hose that communicates with an air supply system in order to conduct fresh air to the interior of said hood;
- (g) an outflow valve attached to said smoke hood and adapted to permit air to escape from the hood with increased internal pressure inside the hood;
- and
- (h) a flap valve detachably secured to said neck seal and covering said neck seal opening, said flap valve being adapted to be displaced when the head of the user is inserted into said smoke hood.
6 more elements
Dependencies are inferred from the claim text.