EP0238129B1 - Gas mask - Google Patents

Gas mask Download PDF

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Publication number
EP0238129B1
EP0238129B1 EP87200418A EP87200418A EP0238129B1 EP 0238129 B1 EP0238129 B1 EP 0238129B1 EP 87200418 A EP87200418 A EP 87200418A EP 87200418 A EP87200418 A EP 87200418A EP 0238129 B1 EP0238129 B1 EP 0238129B1
Authority
EP
European Patent Office
Prior art keywords
gas mask
mask according
fact
main frame
connection part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87200418A
Other languages
German (de)
French (fr)
Other versions
EP0238129A1 (en
Inventor
Gilbert Vandeputte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Engicom NV
Original Assignee
Engicom NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from BE2/60937A external-priority patent/BE904392A/en
Priority claimed from BE2/61045A external-priority patent/BE905392R/en
Application filed by Engicom NV filed Critical Engicom NV
Priority to AT87200418T priority Critical patent/ATE54571T1/en
Publication of EP0238129A1 publication Critical patent/EP0238129A1/en
Application granted granted Critical
Publication of EP0238129B1 publication Critical patent/EP0238129B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/04—Couplings; Supporting frames

Definitions

  • the present invention concerns a gas mask.
  • gas masks comprise an inlet port, an outlet port and a speaking membrane which are separately disposed in a main supporting frame, while fastening devices can secure this main frame in front of the mouth and nose orifices.
  • a filter connection element is currently also provided, allowing to secure a filter in front of the inlet port.
  • the fastening devices may consist in a face mask which incorporates eye glasses or a panoramic sight glass and possible other accessories.
  • the inlet and outlet ports of such gas masks each is supplied with at least one check valve. Several other fittings are also foreseen in most of the cases.
  • the object of the present invention is to provide a gas mask of the type which is meant to carry a filter which shows a construction which can be relatively easy be assembled and which offers the advantage that the filter after being mounted, does not disturb the person carrying the masks, in his movements.
  • a rotatable filter connection part has the advantage that the relatively heavy filter can be easily displaced from an inconvenient position by bringing it into another position.
  • this gas mask comprises a monolithic main frame and a filter connection part which can be rotated in all directions whereby the filter connection part is connected to the main frame by means of a ball joint.
  • a monolithic frame has the advantage that the gas masks are easy to manufacture and that their correct functioning can be easily checked.
  • the pivotable filter connection part is able to rotate in one plane.
  • the connection between the inlet and outlet part, on the one hand, and the filter connection part on the other hand, is achieved in this case by means of a pivotable elbow-shaped coupling part.
  • One end of this coupling part is always turned to the mouth of the gas mask user while the filter connection part is mounted on the other end.
  • the gas mask comprises a main frame 1 incorporating inlet and outlet ports (6, 7), fastening devices 2, in order to secure the main frame in front of the mouth and nose orifices and a filter connection part 3.
  • the fastening devices 2 are already known and may be composed for instance of a face mask which is equipped with eye glasses 4 or possibly with a panoramic sight glass 4A.
  • different kinds of filters 5 may be foreseen and are selected in accordance with the application involved.
  • the specific character of the invention consists in the fact that the main frame 1, as illustrated on Figures 2 to 4 is made of one single piece.
  • This monolithic element is provided with several inlet channels 6 and with an outlet orifice 7 which can be shut-off by means of a venting valve 8.
  • the inlet and outlet part 1 can be also equipped, for instance, with a speaking membrane 9.
  • This main frame 1 may, however, be also equipped with other accessories like a device for absorbing liquid food, a second speaking membrane for a telecommunication connection, a transpiration drainage system and so on.
  • a coupling device 10 is specially designed for movably mounting the filter connection part 3 on the main frame 1, as illustrated on Figures 1 to 4.
  • This device (10) is made, for instance, of a flexible air supply line 11 and of a ball joint 12.
  • the flexible air supply pipe is made preferably of bellows.
  • the first part 13 of the ball joint 12 is a part of the main frame 1.
  • the second part 14 which is, for instance, the ball is fastened on the end 15 of rod 16 whereby this rod 16 is supporting the filter connection part 3 on its opposite end 17.
  • clamping straps 18 to 20 must be also foreseen in order to secure, on the one hand, the flexible air supply pipe 11 and, on the other hand, the face mask on the main frame 1 and the filter connection part3. Moreover a sealing right 21 must also be mounted into the filter connection part 3.
  • the coupling devices 10 may also be made of a large ball joint having a central aperture. To this end this ball joint may have a hollow shape.
  • the ball of the ball joint may be, for instance, the continuation of the lowest end 22 of the main frame 1 while the casing of the ball joint is monolithic with the filter connection part 3.
  • the coupling device 10 may also be made of a cross-coupling.
  • the coupling device 10 consists of the flexible air supply pipe 11 only.
  • This flexible pipe is, indeed, strong enough in order that it keeps its last position in spite of the weight of the filter 5.
  • the Figures 5 and 6 are illustrating still another preferred embodiment of the invention with a very compact main frame 1.
  • the main frame 1 consists, in this case, of a casing 23.
  • the front side of the casing 23 is made of a double grid 24 whereby both grid parts 25 and 26 are designed in such a way that their respective grid apertures 27 and 28 are not overlapping each other.
  • the double grid 24 has the advantage that jets, for instance water jets, cannot penetrate into the inlet and outlet part and damage the speaking membrane 9.
  • the rear side of the casing 23 is made of the speaking membrane 9 and of a grid 29 located on the side of the user's face in order to protect the membrane 9.
  • the acoustic vibrations can be carried to the outside without difficulty.
  • the casing 23 is equipped with double-wall sides 30 which are made of respectively one inside wall 31 and one outside wall 32.
  • the intermediate space 33 is in connection with the inside of the gas mask.
  • an outlet aperture 7 is mounted and sealed by means of a venting valve 8.
  • the exhaled air can be evacuated this way through the venting valve, the inside of the casing 23 and the double grid 24.
  • the use of two inlet apertures has the advantage that the resistance opposed to respiration is reduced.
  • the pivotable filter connection part 3 of Figure 5 can be turned by 180 degrees in one plane.
  • the coupling device 10 is made of an elbow-shaped coupling part 34 rotatable around an axis A-A as well as an adequate seat 35.
  • the seat 35 is designed in such a way that a tight fit is achieved for the coupling part 34.
  • One end 36 of this coupling part 34 is oriented to the face of the mask users while the second end 37 is turned downwards and forms the filter connection part 3.
  • the seat 35 is preferably mounted under the casing 23 in orderto achieve a compact system.
  • an inlet valve 38 is mounted.
  • devices 39 are foreseen in order to permit the insertion of an auxiliary part 40 for food supply and evacuation of transpiration moisture.
  • the means 39 are, for instance, a support plate.
  • the casing 23, the seat 35 and the means 39 are preferably made of one single pressure cast part. This has the advantage that a strong assembly is achieved. Moreover one single opening must be foreseen in the mask because all fittings are located in the same monolithic element.

Abstract

Gas mask mainly composed of an inlet and outlet part (1) with possibly a speaking membrane (9), fastening devices (2) for securing the inlet and outlet part (1) before the mouth and nose orifices and a filter connection part (3), which is rotatable towards the inlet and outlet part.

Description

  • The present invention concerns a gas mask.
  • As already known gas masks comprise an inlet port, an outlet port and a speaking membrane which are separately disposed in a main supporting frame, while fastening devices can secure this main frame in front of the mouth and nose orifices. A filter connection element is currently also provided, allowing to secure a filter in front of the inlet port. The fastening devices may consist in a face mask which incorporates eye glasses or a panoramic sight glass and possible other accessories. Further it is known that the inlet and outlet ports of such gas masks each is supplied with at least one check valve. Several other fittings are also foreseen in most of the cases.
  • It is known that the existing filters are relatively heavy and bulky. This can result to the limitation of the head movements, to an additional reduction of the sight field, which is already quite limited in the case of masks, to the quickly increasing fatigue of specific neck muscles caused by the applied couple and to the difficult or even impossible use of instruments, tools or devices for the mask user.
  • Moreover, a lot of known gas masks have the disadvantage that the maintenance is made difficult by the large number of separate parts. Another disadvantage is related to the fact that, on the one hand, the assembly during the man- facturing and, on the other hand, the control of the right functioning of the gas mask require a relatively long time.
  • The use of a rather simple main frame, comprising an inlet port and an outlet port, is known of documents US-A-2 133 345 and GB-A-837 355. However, the devices disclosed by these documents are not suitable to be used in gas masks which are meant to be provided with a filter, but are specifically constructed for use in masks which are connected to a flexible tube for air supply.
  • The object of the present invention is to provide a gas mask of the type which is meant to carry a filter which shows a construction which can be relatively easy be assembled and which offers the advantage that the filter after being mounted, does not disturb the person carrying the masks, in his movements.
  • To this end the invention foresees a gas mask which is incorprating the features specified in Claim 1.
  • The use of a rotatable filter connection part has the advantage that the relatively heavy filter can be easily displaced from an inconvenient position by bringing it into another position.
  • In a first preferred embodiment this gas mask comprises a monolithic main frame and a filter connection part which can be rotated in all directions whereby the filter connection part is connected to the main frame by means of a ball joint. Quite obviously the use of a monolithic frame has the advantage that the gas masks are easy to manufacture and that their correct functioning can be easily checked.
  • According to a second preferred embodiment, the pivotable filter connection part is able to rotate in one plane. The connection between the inlet and outlet part, on the one hand, and the filter connection part on the other hand, is achieved in this case by means of a pivotable elbow-shaped coupling part. One end of this coupling part is always turned to the mouth of the gas mask user while the filter connection part is mounted on the other end.
    • Figure 1 a first embodiment of the gas mask according to the invention;
    • Figure 2 a cross-section through the inlet and outlet part and the filter connection part of the gas mask of Figure 1;
    • Figure 3 a view following the arrow F3 of Figure 2;
    • Figure 4 a view following the arrow F4 of Figure 2;
    • Figure 5 a second embodiment of the gas mask according to the invention;
    • Figure 6 a cross-section following the lines VI-VI of Figure 5.
  • As illustrated on Figure 1 the gas mask comprises a main frame 1 incorporating inlet and outlet ports (6, 7), fastening devices 2, in order to secure the main frame in front of the mouth and nose orifices and a filter connection part 3. The fastening devices 2 are already known and may be composed for instance of a face mask which is equipped with eye glasses 4 or possibly with a panoramic sight glass 4A. In the filter connection part 3, different kinds of filters 5 may be foreseen and are selected in accordance with the application involved.
  • The specific character of the invention consists in the fact that the main frame 1, as illustrated on Figures 2 to 4 is made of one single piece. This monolithic element is provided with several inlet channels 6 and with an outlet orifice 7 which can be shut-off by means of a venting valve 8. The inlet and outlet part 1 can be also equipped, for instance, with a speaking membrane 9. This main frame 1 may, however, be also equipped with other accessories like a device for absorbing liquid food, a second speaking membrane for a telecommunication connection, a transpiration drainage system and so on.
  • Another specific characteristic of the invention consists in the fact that the filter connection part 3 is pivotable towards the left or right side of the mask, in such a way that the filter connection part 3, with the filter 5 fastened on it, is able to keep the position to which it was last brought. To this end a coupling device 10 is specially designed for movably mounting the filter connection part 3 on the main frame 1, as illustrated on Figures 1 to 4.
  • This device (10) is made, for instance, of a flexible air supply line 11 and of a ball joint 12. The flexible air supply pipe is made preferably of bellows.
  • The first part 13 of the ball joint 12 is a part of the main frame 1. The second part 14 which is, for instance, the ball is fastened on the end 15 of rod 16 whereby this rod 16 is supporting the filter connection part 3 on its opposite end 17.
  • Quite obviously, several clamping straps 18 to 20 must be also foreseen in order to secure, on the one hand, the flexible air supply pipe 11 and, on the other hand, the face mask on the main frame 1 and the filter connection part3. Moreover a sealing right 21 must also be mounted into the filter connection part 3.
  • The functioning of the gas mask according to Figures 1 to 4 can be easily understood by examining this latter figure. If the ball joint 12 is made tightly enough, we get the advantage that the filter connection part 3 as well as the filter 5 may be located in whichever position in order that the annoyance for the gas mask user becomes very limited.
  • According to an alternative solution which is not illustrated on the figures, the coupling devices 10 may also be made of a large ball joint having a central aperture. To this end this ball joint may have a hollow shape. The ball of the ball joint may be, for instance, the continuation of the lowest end 22 of the main frame 1 while the casing of the ball joint is monolithic with the filter connection part 3.
  • Quite obviously the coupling device 10 may also be made of a cross-coupling.
  • According to still another embodimentthe coupling device 10 consists of the flexible air supply pipe 11 only. This flexible pipe is, indeed, strong enough in order that it keeps its last position in spite of the weight of the filter 5.
  • The Figures 5 and 6 are illustrating still another preferred embodiment of the invention with a very compact main frame 1. The main frame 1 consists, in this case, of a casing 23.
  • The front side of the casing 23 is made of a double grid 24 whereby both grid parts 25 and 26 are designed in such a way that their respective grid apertures 27 and 28 are not overlapping each other. The double grid 24 has the advantage that jets, for instance water jets, cannot penetrate into the inlet and outlet part and damage the speaking membrane 9.
  • The rear side of the casing 23 is made of the speaking membrane 9 and of a grid 29 located on the side of the user's face in order to protect the membrane 9. As the speaking membrane 9 is located directly before the mouth, the acoustic vibrations can be carried to the outside without difficulty.
  • The casing 23 is equipped with double-wall sides 30 which are made of respectively one inside wall 31 and one outside wall 32. The intermediate space 33 is in connection with the inside of the gas mask. On both sides of the casing 23 in the inside wall 31 an outlet aperture 7 is mounted and sealed by means of a venting valve 8. The exhaled air can be evacuated this way through the venting valve, the inside of the casing 23 and the double grid 24. The use of two inlet apertures has the advantage that the resistance opposed to respiration is reduced.
  • The pivotable filter connection part 3 of Figure 5 can be turned by 180 degrees in one plane. To this end the coupling device 10 is made of an elbow-shaped coupling part 34 rotatable around an axis A-A as well as an adequate seat 35. Preferably the seat 35 is designed in such a way that a tight fit is achieved for the coupling part 34. One end 36 of this coupling part 34 is oriented to the face of the mask users while the second end 37 is turned downwards and forms the filter connection part 3.
  • As also illustrated on Figure 5 the seat 35 is preferably mounted under the casing 23 in orderto achieve a compact system.
  • Near the end 36 of the coupling part 34 an inlet valve 38 is mounted.
  • On the bottom face of the main frame, devices 39 are foreseen in order to permit the insertion of an auxiliary part 40 for food supply and evacuation of transpiration moisture. The means 39 are, for instance, a support plate.
  • The casing 23, the seat 35 and the means 39 are preferably made of one single pressure cast part. This has the advantage that a strong assembly is achieved. Moreover one single opening must be foreseen in the mask because all fittings are located in the same monolithic element.

Claims (15)

1. Gas mask comprising: a) a main frame incorporating inlet and outlet ports (6, 7), b) fastening devices securing the main frame in front of the mouth and nose orifices, and c) an inlet connection part (3) mounted on the main frame, characterized in that the inlet connection part (3) is pivotably mounted, via a coupling device (10), at least around an axis substantially perpendicular with respect to the front side of the mask, so that a filter (5) connected to and carried by said connection part (3) is capable of being swung from a central position to the left or right side of the mask.
2. Gas mask according to claim 1, characterized by the fact that the main frame (1) is made up of one single piece.
3. Gas mask according to claims 1 or 2, characterized in that the pivotable filter connection part (3) is constructed so that it is able to keep the filter (5) in the position to which it was last brought.
4. Gas mask according to one of the claims 1 to 3, characterized by the fact that the filter connection part (3) is mounted in front of the inlet port (6) of the mask, and that the coupling device (10) comprises a flexible air supply pipe (11) and a ball joint (12).
5. Gas mask according to claim 4, characterized by the fact that one part (13) of the ball joint is secured on the said main frame while the second part (14) of the ball joint is mounted on the end (15) of a rod (16) whereby the said filter connection part (3) is supported by means of the opposite end (17) of said rod (16).
6. Gas mask according to claim 5, characterized by the fact that the part (14) of the ball joint (12) which is mounted on the rod (16) is made of the ball of the joint.
7. Gas mask according to one oftheclaims4to 6, characterized by the fact that the air supply pipe (11) comprises bellows.
8. Gas mask according to one of the claims 2 to 7, characterized by the fact that the said main frame is composed of several inlet channels (6) and of an outlet orifice (7) which is provided with a venting valve (8) and a speaking membrane (9).
9. Gas mask according to one of the claims 1, 2 or 3, characterized in that the coupling device (10) comprises: a) an elbow-shaped coupling part (34) pivotable around said axis and b) a seat (35) for rotably receiving one end (36) of said coupling part (34) while the other end (37) of this coupling part (34) terminates with the filter connection part (3).
10. Gas mask according to one of the claims 2 or 9, characterized by the fact that the said main frame (1) comprises a casing (23) which is exposed with its front side to the surrounding atmosphere of the gas mask, while its rear side is supporting the speaking membrane (9) and venting valves (8) are provided at least along both lateral sides (30).
11. Gas mask according to claim 10, characterized by the fact that the front side of the casing (23) is equipped with a double grid (24), both grid parts (25, 26) of which being designed in such a way that their respective grid orifices (27, 28) are not overlapping each other.
12. Gas mask according to claims 10 or 11, characterized by the fact that the casing (23) is equipped on the inside of the gas mask with a grid (29) in order to protect the speaking membrane (9).
13. Gas mask according to claim 9, characterized by the fact that at least the main frame (1) and the seat (35) consist of a monolithic pressure cast part.
14. Gas mask according to one of the previmus claims, characterized in that on the bottom side of the main frame (1), means (39) are provided to support an auxiliary part (40) for food supply and for evacuation of the transpiration moisture.
15. Gas mask according to one of the previous claims, characterized by the fact that the fastening devices (2) are a face mask.
EP87200418A 1986-03-12 1987-03-06 Gas mask Expired - Lifetime EP0238129B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87200418T ATE54571T1 (en) 1986-03-12 1987-03-06 GAS MASK.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE2/60937A BE904392A (en) 1986-03-12 1986-03-12 GAS MASK
BE2060937 1986-03-12
BE2061045 1986-09-08
BE2/61045A BE905392R (en) 1986-09-08 1986-09-08 GAS MASK.

Publications (2)

Publication Number Publication Date
EP0238129A1 EP0238129A1 (en) 1987-09-23
EP0238129B1 true EP0238129B1 (en) 1990-07-18

Family

ID=25661837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87200418A Expired - Lifetime EP0238129B1 (en) 1986-03-12 1987-03-06 Gas mask

Country Status (7)

Country Link
EP (1) EP0238129B1 (en)
AT (1) ATE54571T1 (en)
CA (1) CA1285452C (en)
ES (1) ES2000236B3 (en)
GR (2) GR880300003T1 (en)
IL (1) IL81847A0 (en)
NO (1) NO166839C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1216459B (en) * 1988-02-26 1990-03-08 Ind Pirelli S P A Milano Minis PROTECTIVE MASK FOR OPERATIONAL INTERVENTIONS IN CONTAMINATED ENVIRONMENTS.
DE4220780C1 (en) * 1992-06-25 1993-09-23 Draegerwerk Ag, 23558 Luebeck, De
DE19845572C2 (en) * 1998-10-02 2002-06-06 Draeger Safety Ag & Co Kgaa Speech transmitter for a respirator
AU2003229221A1 (en) 2002-05-29 2003-12-12 David Snaith Respirator hood assembly
US20060180153A1 (en) * 2005-01-27 2006-08-17 Bernie Schaub Assembly for mounting a device to a mask

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1366437A (en) * 1918-10-18 1921-01-25 Otto F Wagenhorst Gas-mask
DE687036C (en) * 1934-03-22 1940-01-20 Bernh Draeger Hose coupling, especially for breathing apparatus
FR811036A (en) * 1935-12-24 1937-04-05 Ericsson Telefon Sfe Fse Respirator mask for aviation and other applications
US2133345A (en) * 1937-03-31 1938-10-18 Davis Emergency Equipment Comp Respiratory appliance
GB837355A (en) * 1958-01-20 1960-06-15 Mine Safety Appliances Co Breathing mask construction
US3042033A (en) * 1959-07-27 1962-07-03 Globe Ind Inc Connecting member
US3348537A (en) * 1965-03-01 1967-10-24 Mine Safety Appliances Co Combination breathing valve and speaking diaphragm unit

Also Published As

Publication number Publication date
ES2000236A4 (en) 1988-02-01
ES2000236B3 (en) 1990-10-16
ATE54571T1 (en) 1990-08-15
NO166839C (en) 1991-09-11
NO166839B (en) 1991-06-03
NO871003L (en) 1987-09-14
GR3000653T3 (en) 1991-09-27
EP0238129A1 (en) 1987-09-23
GR880300003T1 (en) 1988-10-18
CA1285452C (en) 1991-07-02
IL81847A0 (en) 1987-10-20
NO871003D0 (en) 1987-03-11

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