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US-12623096-B2 - Emergency filter system for ventilated hood

US12623096B2US 12623096 B2US12623096 B2US 12623096B2US-12623096-B2

Abstract

A ventilated hood having an external air flow hose and comprising a filter incorporated in the ventilated hood, and a seal, wherein when the seal is intact, air does not flow through the filter.

Inventors

  • Christophe CHESSARI
  • Swan Tuffery

Assignees

  • HONEYWELL SAFETY PRODUCTS USA, INC.

Dates

Publication Date
20260512
Application Date
20240905
Priority Date
20111215

Claims (17)

  1. 1 . A ventilated hood, comprising: an external air flow hose coupled to the ventilated hood; an emergency breathing apparatus comprising a filter incorporated in the ventilated hood, the filter having an exterior face and an interior face, where the exterior face of the filter is configured to face towards an exterior of the ventilated hood and wherein the interior face of the filter is configured to face towards an interior of the ventilated hood; a first seal coupled to one of the exterior of the ventilated hood or the exterior face of the filter; a facepiece; a breathing pipe coupled at one end to the filter and at a second end to the facepiece; a head enclosure; and a cowl coupled to the head enclosure and configured to drape over a top of the shoulders of a user of the ventilated hood, wherein the emergency breathing apparatus is removably coupled to the cowl with a tearable weld and/or an adhesive joint.
  2. 2 . The ventilated hood of claim 1 , further comprising a collar, where the collar is configured to inflate when air is flowing through an external air flow hose and to impede infiltration of contaminants from an outside environment into an inside of the head enclosure.
  3. 3 . The ventilated hood of claim 2 , wherein the collar is configured to leak the received airflow in a controlled manner such that removal of the received airflow deflates the collar to avoid suffocation.
  4. 4 . The ventilated hood of claim 1 , wherein the filter is incorporated in the cowl.
  5. 5 . The ventilated hood of claim 2 , wherein the filter is incorporated in the head enclosure.
  6. 6 . The ventilated hood of claim 1 , wherein the filter comprises at least one of an absorbent medium and an adsorbent medium.
  7. 7 . The ventilated hood of claim 2 , wherein the filter is coupled to the head enclosure.
  8. 8 . The ventilated hood of claim 1 , wherein the external air flow hose is coupled to a powered air purifying respirator (PAPR).
  9. 9 . The ventilated hood of claim 2 , wherein the collar comprises a crossing configured to allow the emergency breathing apparatus to pass through the collar.
  10. 10 . The ventilated hood of claim 1 , wherein the facepiece is configured to fit over the nose and mouth of the user.
  11. 11 . The ventilated hood of claim 10 , wherein an edge of the facepiece is configured to seal against the face of the user when worn.
  12. 12 . The ventilated hood of claim 1 , wherein the facepiece includes a mouthpiece configured to allow the user to hold the facepiece against their face.
  13. 13 . The ventilated hood of claim 12 , wherein the breathing pipe passes through an opening in the facepiece, wherein the breathing pipe is coupled at one end to the filter and at the other end to the mouthpiece.
  14. 14 . The ventilated hood of claim 1 , wherein the facepiece comprises an exhalation valve.
  15. 15 . The ventilated hood of claim 10 , wherein the facepiece comprises a nose clip configured to fit over the nose of the user.
  16. 16 . The ventilated hood of claim 1 , further comprising a second seal coupled to one of the interior of the ventilated hood or the interior face of the filter.
  17. 17 . The ventilated hood of claim 16 , wherein the filter is moisture laden when both the first seal and the second seal are intact.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation application of U.S. patent application Ser. No. 17/237,903, filed Apr. 22, 2021, which is a continuation application of, and claims priority to U.S. patent application Ser. No. 15/382,205 entitled “EMERGENCY FILTER SYSTEM FOR VENTILATED HOOD” filed on Dec. 16, 2016, which is a continuation-in-part (CIP) application of U.S. patent application Ser. No. 13/278,439, filed Oct. 21, 2011, entitled “Emergency Filter System for Encapsulated Suit,” by Swan Tuffery, and which is related to and claims priority to Europe Patent Application No. EP16204513.2, filed Dec. 15, 2016, entitled “Emergency Filter System for Ventilated Hood” by Christophe Chessari et al., each of which are incorporated herein by reference in their entireties. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT Not applicable. REFERENCE TO A MICROFICHE APPENDIX Not applicable. BACKGROUND Protective suits may be worn in contaminated areas to protect the wearer of the suit. For example, workers may wear a protective suit while working inside of a nuclear powered electrical generating plant or in the presence of radioactive materials. A protective suit may be a one-time use type of system, wherein after a single use the suit is disposed of. A protective suit may receive breathing air during normal operating conditions via an external air flow hose connected to the suit. The air may be supplied, for example, by a powered air purifying respirator (PAPR) that may be carried by the user. SUMMARY In an embodiment, a protective suit is disclosed. The protective suit comprises an external air flow hose, a filter incorporated in the protective suit, and a seal, wherein when the seal is intact, air does not flow through the filter. In another embodiment, a ventilated hood is disclosed. The ventilated hood comprises an external air flow hose coupled to the ventilated hood, a filter incorporated in the ventilated hood, the filter having an exterior face and an interior face, where the exterior face of the filter faces towards an exterior of the ventilated hood and wherein the interior face of the filter faces towards an interior of the ventilated hood, a first seal coupled to one of the exterior of the ventilated hood or the exterior face of the filter, a head enclosure, and a collar coupled to the external air flow hose and configured to inflate in response to air flow in the external air flow hose to impede infiltration of contaminants from an external environment to an interior of the head enclosure. In an embodiment, a method of using a ventilated hood is disclosed. The method comprises donning a ventilated hood, the ventilated hood having an external air flow hose, a filter incorporated in the ventilated hood, and a first seal, wherein when the first seal is intact, air does not flow out through the filter from an interior of the ventilated hood, after donning the ventilated hood, breaching the first seal, and after breaching the first seal, inhaling air received from the filter. These and other features will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present disclosure, reference is now made to the following brief description, taken in connection with the accompanying drawings and detailed description, wherein like reference numerals represent like parts. FIG. 1 illustrates an encapsulated protective suit according to an embodiment of the disclosure. FIG. 2 illustrates an emergency air breathing apparatus for use with an encapsulated protective suit according to an embodiment of the disclosure. FIG. 3A illustrates a sealed air filter according to an embodiment of the disclosure. FIG. 3B illustrates an unsealed air filter according to an embodiment of the disclosure. FIG. 3C illustrates an air flow of an emergency air breathing apparatus coupled to an encapsulated protective suit according to an embodiment of the disclosure. FIG. 4 illustrates an emergency air breathing apparatus for use with an encapsulated protective suit according to another embodiment of the disclosure. FIG. 5A and FIG. 5B illustrate a ventilated hood worn by a human being according to embodiments of the disclosure. FIG. 6A and FIG. 6B illustrate aspects of a ventilated hood according to embodiments of the disclosure. FIG. 7A and FIG. 7B illustrate aspects of a ventilated hood according to embodiments of the disclosure. DETAILED DESCRIPTION It should be understood at the outset that although illustrative implementations of one or more embodiments are illustrated below, the disclosed systems and methods may be implemented using any number of techniques, whether currently known or not yet in existence. The disclosure should in no way be limited to the illustrative implementations, drawings, and techniques illustrated below, but may be modifi