Emergency breathing apparatus

• US 4,116,237 A
• Filed: 02/07/1977
• Issued: 09/26/1978
• Est. Priority Date: 02/07/1977
• Status: Expired due to Term

• Current Assignee: Norman Birch
• Original Assignee: Norman Birch
• Inventors: Birch, Norman
• Primary Examiner(s): Recla, Henry J.
• Application Number:
  US05/766,063
• Time in Patent Office: 596 Days
• Field of Search: 128/142.7, 128/142.5, 128/142.6, 128/145 A, 128/145 R, 128/142 R, 128/142.2, 128/142.4, 128/141 A, 128/141, 128/203, 128/202, 2/5 R, 2/205
• US Class Current: 128/201.11
• CPC Class Codes: A62B 17/04 Hoods
• CPC Class Codes: A62B 18/04 Gas helmets

Abstract

An emergency breathing apparatus which comprises a tubular frame and which carries a hood capable of extending over the head of an individual using the apparatus. The frame contains a pair of frame sections constructed of tubular members having internal chambers containing oxygen under pressure. The frame sections are normally shifted to a closed position and when opened, a switch on the frame permits the passage of oxygen into a plenum area surrounded by the hood. Moreover, the hood is capable of being attached to the individual in such fashion that an essentially air-tight plenum chamber is created around the face portion of the user of the apparatus. The apparatus also serves as a crash helmet inasmuch as the crown of the hood is reinforced. Moreover, the hood is provided with a two-way communication system which is automatically energized upon donning of the apparatus.

Claims

1. An emergency breathing apparatus for donning by an individual to create a substantially air-tight breathing plenum for the individual;

said apparatus comprising;

(a) frame means comprising a relatively rigid frame section,

(b) said frame section having a chamber means formed therein capable of containing a supply of an oxygen containing gas,

(c) a hood formed of a relatively flexible substantially air-impervious material operatively located over a portion of said frame means and sized to be disposed over the head of an adult individual to form a breathing plenum,

(d) gas dispensing means comprising an outlet means on said frame section to permit the dispensing of said gas from said chamber means to said plenum when said apparatus is donned by an individual, and

(e) switch means automatically responsive to the donning of said apparatus for automatically dispensing the gas from the chamber to the plenum.

2. The emergency breathing apparatus of claim 1 further characterized in that said frame section is constructed of a plurality of hollow pipe sections which form an internal chamber and which are connected together to form said chamber means.

3. The emergency breathing apparatus of claim 1 further characterized in that said hood is provided with a transparent member on a front portion thereof in the vicinity of the eyes of a user for visual ability by the user of said apparatus, and a heat resistant protective member disposed over said transparent member to protect same.

4. The emergency breathing apparatus of claim 1 further characterized in that said hood is provided with a two-way audio means to enable the user of the apparatus to speak to and hear another individual.

5. The emergency breathing apparatus of claim 1 further characterized in that said hood is provided with filtering means to permit passage of breathable air without passage of toxic gas harmful to a human being, and which filtering means is capable of taking in a breathable air from the external atmosphere and filtering such toxic gas therefrom in response to the exhaustion of said supply of oxygen containing gas in said chamber means.

6. The emergency breathing apparatus of claim 1 further characterized in that said hood is provided with a hard impact resistant crown and an overlaying compliant cushion to protect the head of the user from knocks and bruises.

7. The emergency breathing apparatus of claim 6 further characterized in that said impact resistant crown is comprised of a multiplicity of individual plates to facilitate stowage.

8. An emergency breathing apparatus for donning by an individual to create a substantially air-tight breathing plenum for the individual;

said apparatus comprising;

(a) frame means comprising a relatively rigid frame section,

(b) said frame section being comprised of a plurality of hollow pipe sections which are connected together to form a chamber means therein capable of containing a supply of an oxygen containing gas,

(c) a hood formed of a relatively flexible substantially air-impervious material operatively located over at least a portion of said frame means and sized to be disposed over the head of an adult individual to form a breathing plenum,

(d) outlet means in said pipe sections permitting the dispensing of said gas from said chamber to said plenum,

(e) switch means automatically responsive to the donning of said apparatus for automatically dispensing the gas from the chamber to the plenum,

(f) a transparent member in a front portion of said hood in the vicinity of the eyes of a user of said apparatus for visual ability by the user of said apparatus,

(g) a heat resistant protective member disposed over said transparent member to protect same,

(h) a two-way audio means in said hood to enable the user of the apparatus to speak to and hear another individual,

(i) and filtering means in said hood to permit passage of breathable air without passage of toxic gas harmful to a human being, and which filtering means permits passage of the breathable air with filtering of toxic gas in response to the exhaustion of said supply of oxygen containing gas in said chamber means.

9. An emergency breathing apparatus comprising:

(a) a first frame member having a chamber therein for storing an oxygen containing gas under pressure,

(b) a second frame member having a chamber therein for storing a similar oxygen containing gas,

(c) hinge means operatively connecting said first and second frame members at one of the ends thereof so that the other of the ends of said frame members can be shifted from a closed position to an open position,

(d) a hood formed of a relatively flexible substantially air-impervious material operatively connected to and disposed over said first and second frame members,

(e) means on said hood to enclose said hood at least about the head portion of an individual using said apparatus to provide a substantially air-tight plenum,

(f) and gas dispelling means to release said gas in said chambers to said plenum.

10. The emergency breathing apparatus of claim 9 further characterized in that said first and second frame members have upper ends are hingedly connected together in proximity to their upper ends;

and spring means is operatively associated with said frame sections to bias said frame sections together.

11. The emergency breathing apparatus of claim 9 further characterized in that said first and second frame members are somewhat U-shaped in construction and each are formed of hollow tubular members having internal chambers for storing said gas under pressure.

12. The emergency breathing apparatus of claim 9 further characterized in that said apparatus comprises a gas regulator, said gas dispelling means comprises apertured means in said first and second frame members to release said gas to said plenum, and actuating means is connected between said regulator and said apertured means in said frame members to release said gas from said chambers to said regulator and hence to said plenum when said first and second frame members are shifted to the open position such that the gas is released to said plenum in an amount controlled by said gas regulator.

13. The emergency breathing apparatus of claim 9 further characterized in that flow adjustment means is operatively associated with said gas dispelling means to automatically adjust the amount of gas released to the plenum as a function of the size of an individual using said apparatus.

14. The emergency breathing apparatus of claim 9 further characterized in that economizer flow means is operatively associated with said gas dispelling means to automatically adjust the amount of gas released to the plenum in response to the plenum as a function of the physical exertion level exercised by the individual using said apparatus.

15. A self-contained emergency breathing apparatus comprising:

(a) frame means comprised of at least one tubular member,

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) said tubular member having a chamber therein forming an oxygen supply means operatively located with and carried by said frame means to render said apparatus a self-contained unit,

(d) and release means operatively connected to said supply means and automatically responsive to the donning of said apparatus to automatically release oxygen containing gas from said supply means to said plenum chamber upon donning by the user.

16. The apparatus of claim 15 further characterized in that flow adjustment means is operatively associated with said release means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the size of an individual using said apparatus.

17. A self-contained emergency breathing apparatus comprising:

(a) frame means,

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) oxygen supply means carried by said frame means for supplying oxygen to the interior of said hood,

(d) a snorkel tube operatively associated with said apparatus and having a portion in fluid communication with said plenum chamber and means for holding said snorkel tube in a nested position about said hood whereby, said snorkel tube can be extended to an open position where an outer end of said snorkel tube extends beyond said hood to be in communication with an external air containing atmosphere,

(e) and means operatively associated with said snorkel tube to permit air from the external atmosphere to enter the plenum chamber when in the open extended position.

18. The self-contained emergency breathing apparatus of claim 17 further characterized in that said apparatus is adapted to be used on aircraft for survival in a water media.

19. The self-contained emergency breathing apparatus of claim 17 further characterized in that said oxygen supply means is operatively located with and carried by said frame means to render said apparatus a self-contained unit.

20. The self-contained emergency breathing apparatus of claim 17 further characterized in that said frame means is comprised of at least one tubular member having a chamber therein which constitutes said oxygen supply means.

21. An oxygen supply system for supplying oxygen to a plenum chamber created by a hood surrounding the head of an individual, said system comprising:

(a) a frame member,

(b) an oxygen reservoir contained in said frame means,

(c) a hood carried by said frame means and being disposed over a portion of said frame means and creating a plenum chamber surrounding the head of an individual,

(d) valve means responsive to the donning of said frame member carrying said hood to automatically open and permit a supply of oxygen from said oxygen reservoir to said plenum chamber,

(e) regulator means connected to said valve means to control the flow of oxygen to said plenum chamber, and

(f) flow adjustment means operatively connected to said regulator means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the size of an individual using said apparatus.

22. The oxygen supply system of claim 21 further characterized in that economizer flow means is operatively connected to said flow adjustment means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the physical exertion level exercised by an individual using said apparatus.

23. A method of supplying oxygen to a plenum chamber surrounding the head of an individual in an emergency situation, and which plenum chamber is created by a hood supported by first and second frame sections capable of being expanded from a folded position and having chambers therein constituting a supply of oxygen, said method comprising:

(a) expanding said first and second frame sections from a folded position to an open position,

(b) automatically releasing the supply of oxygen from said chambers to said plenum chamber as said frame sections are expanded, and

(c) automatically regulating the supply of oxygen to said plenum chamber upon opening said frame sections and as a function of the size of an individual.

24. An emergency breathing apparatus for donning by an individual to create a substantially air-tight breathing plenum for the individual;

said apparatus comprising;

(a) frame means comprising a relatively rigid frame section,

(b) said frame section being comprised of a plurality of hollow pipe sections operatively connected together with each having an internal chamber therein forming a chamber means capable of containing a supply of an oxygen containing gas,

(c) a hood formed of a relatively flexible substantially air-impervious material disposed over a portion of said frame section with said hood and sized to be disposed over the head of an adult individual to form a breathing plenum,

(d) and gas dispensing means operatively associated with said chamber means and responsive to the donning of said apparatus to automatically permit the dispensing of said gas from said chamber means to said plenum when said apparatus is donned by an individual.

25. The emergency breathing apparatus of claim 24 further characterized in that said gas dispensing means comprises outlet means in said frame section permitting the dispensing of said gas from said chamber, and switch means automatically responsive to the donning of said apparatus to automatically dispense the gas from the chamber to the plenum.

26. The emergency breathing apparatus of claim 24 further characterized in that said hood is provided with a transparent member on a front portion thereof in the vicinity of the eyes of a user for visual ability by the user of said apparatus, and a heat resistant protective member disposed over said transparent member to protect same.

27. The emergency breathing apparatus of claim 24 further characterized in that siad hood is provided with a two-way audio means to enable the user of the apparatus to speak to and hear another individual.

28. The emergency breathing apparatus of claim 24 further characterized in that said hood is provided with filtering means to permit passage of breathable air without passage of toxic gas harmful to a human being, and which filtering means is capable of passage of breathable air from the external atmosphere and filter such toxic gasses therefrom in response to the exhaustion of said supply of oxygen containing gas in said chamber means.

29. A self-contained emergency breathing apparatus comprising:

(a) frame means,

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) oxygen supply means operatively located with and carried by said frame means to render said apparatus a self-contained unit,

(d) release means operatively connected to said supply means and responsive to the donning of said apparatus to automatically release an oxygen containing gas from said supply means to said plenum chamber upon donning by the user, and

(e) flow adjustment means operatively associated with said release means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the size of an individual using said apparatus.

30. The apparatus of claim 29 further characterized in that said frame means is comprised of at least one tubular member having a chamber therein which constitutes said oxygen supply means.

31. A self-contained emergency breathing apparatus comprising:

(a) frame means,

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) oxygen supply means operatively located with and carried by said frame means to render said apparatus a self-contained unit,

(d) release means operatively connected to said supply means and responsive to the donning of said apparatus to automatically release an oxygen containing gas from said supply means to said plenum chamber upon donning by the user, and

(e) economizer flow means operatively associated with said release means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the physical exertion level exercised by an individual using said apparatus.

32. A self-contained emergency breathing apparatus comprising:

(a) frame means capable of being expanded from a folded condition,

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) oxygen supply means operatively located with and carried by said frame means to render said apparatus a with self-contained unit,

(d) release means automatically operable upon opening of said frame means from a folded condition and which is operatively connected to said supply means to automatically release an oxygen containing gas from said supply means to said plenum chamber upon donning by the user, and

(e) an oxygen regulator operatively connected to said supply means and interposed between said supply means and said plenum chamber to regulate the supply of oxygen from said supply means to said plenum chamber.

33. A self-contained emergency breathing apparatus comprising:

(a) frame means capable of being expanded from a folded condition

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) oxygen supply means operatively located with and carried by said frame means to render said apparatus a self-contained unit,

(d) release means automatically operable upon opening of said frame means from a folded condition and which is operatively connected to said supply means to automatically release an oxygen containing gas from said supply means to said plenum chamber upon donning by the user; and

(e) an economizer flow means operatively associated with said release means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the physical exertion level exercised by an individual using said apparatus.

34. A self-contained emergency breathing apparatus comprising:

(a) frame means,

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) oxygen supply means operatively located with and carried by said frame means to render said apparatus a self-contained unit,

(d) release means operatively connected to said supply means and responsive to the donning of said apparatus to automatically release an oxygen containing gas from said supply means to said plenum chamber upon donning by the user, and

(e) a gas filter means located on said hood to permit entry of filtered air from the external atmosphere in response to the exhaustion of the oxygen supply in said oxygen supply means.

35. An oxygen supply system for supplying oxygen to a plenum chamber created by a hood surrounding the head of an individual, said system comprising:

(a) a frame means,

(b) an oxygen reservoir contained in said frame means,

(c) a hood carried by said frame means and creating a plenum chamber surrounding the head of an individual,

(d) valve means responsive to the donning of said frame means carrying said frame means carrying said hood to automatically open and permit a supply of oxygen to said plenum chamber,

(e) regulator means operatively connected to said valve means to control the flow of oxygen to said plenum chamber, and

(f) economizer flow means operatively connected to said regulator means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the physical exertion level exercised by an individual using said apparatus.

36. The oxygen supply system of claim 35 further characterized in that flow adjustment means is operatively associated with said regulator means to automatically adjust the amount of oxygen released to the plenum chamber as a function of the size of an individual using said apparatus.

37. A method of supplying oxygen to a plenum chamber surrounding the head of an individual in an emergency situation, and which plenum chamber is created by a hood supported by first and second frame sections capable of being expanded from a folded position and having chambers therein constituting a supply of oxygen, said method comprising:

(a) expanding said first and second frame sections from a folded position to an open position,

(b) automatically releasing the supply of oxygen from said chamber to said plenum chamber as said frame sections are expanded, and

(c) automatically regulating the supply of oxygen to said plenum chamber upon opening said frame sections and as a function of the physical exertion level of an individual.

38. The method of claim 37 further characterized in that said method comprises automatically regulating the amount of oxygen supplied as a function of the size of an individual.

39. A self-contained emergency breathing apparatus comprising:

(a) frame means,

(b) a hood operatively located on said frame means to extend over the head of a user of the apparatus to create a plenum chamber around the head of the user,

(c) a self-contained stored oxygen supply means operatively located with and carried by said frame means to render said apparatus a self-contained unit,

(d) release means includng a means which is actuable when the apparatus is donned by a user and which is operatively connected to said supply means to automatically release an oxygen containing gas from said supply means to said plenum chamber upon donning by the user, and

(e) said frame means being comprised of at least one tubular member having a chamber therein which constitutes said oxygen supply means.