US3438060A - Airmen's helmets - Google Patents

Airmen's helmets Download PDF

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Publication number
US3438060A
US3438060A US577226A US3438060DA US3438060A US 3438060 A US3438060 A US 3438060A US 577226 A US577226 A US 577226A US 3438060D A US3438060D A US 3438060DA US 3438060 A US3438060 A US 3438060A
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US
United States
Prior art keywords
helmet
pressure
neck
wearer
seal
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
US577226A
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English (en)
Inventor
Marcel J O Lobelle
John Gregory
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.)
ML Aviation Ltd
Original Assignee
ML Aviation Ltd
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Filing date
Publication date
Application filed by ML Aviation Ltd filed Critical ML Aviation Ltd
Application granted granted Critical
Publication of US3438060A publication Critical patent/US3438060A/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
    • A62B18/04—Gas helmets

Definitions

  • the unpressurized area is created solely by an annular resilient member attached to the interior of the upper portion of the helmet and which in use contacts the head and/or hair of the wearer directly and the construction thus avoids the use of the inner bladders of the prior art which surround the entire head except for the facial area of the wearer.
  • the inner side of the top of a pressurized airmans helmet is provided with an annular member which when the helmet is pressurized forms a seal with the top of the head of the wearer to define an unpressurized area substantially equal to the area of the neck of the wearer.
  • the invention is applicable to helmets which are for use with partial-pressure suits as well as to helmets which form part of a full-pressure suit. In the form case however a separate neck-seal needs to be provided in the neck of the helmet.
  • FIGURE 1 is an elevation in cross-section of one such helmet of the type designed for use with a partial-pressure suit;
  • FIGURE 2 is a less-detailed elevation in cross-section of another such helmet also of the type designed for use with a partial-pressure suit;
  • FIGURE 3 is a less-detailed elevation in cross-section of another helmet in accordance with the invention and of the type which forms part of a full-pressure suit.
  • the helmet has a rigid shell 1 having a face aperture for the wearer 2 which can be closed by a visor 3 which is pivoted on side arms at 24.
  • the visor may be controlled in the manner described in our Patent No. 3,128,469.
  • An oxygen mask 4 fits over the wearers mouth and nose and is secured to a pivoted front part 5 of the rigid shell by a resilient connection 6.
  • the front part can be swung outwardly together with the oxygen mask 4 to enable the helmet to be fitted or removed from the wearers head.
  • An oxygen breathing line (not shown) is connected to an inlet 7 in the front part 5 and supplies oxygen to the mask 4 from an oxygen supply regulator (not shown).
  • the regulator also supplies oxygen to pressurize the space 8 within the helmet through a control valve (not shown) in the mask 4 in the conventional way.
  • the helmet includes a neck-seal which is in the form of an inflatable tube 19 which is not annular but is split so that its ends can be separated to enable the wearers head to pass through the neck of the helmet.
  • the tube has a cros-section similar to a figure eight and is inflated with oxygen from the high pressure side of the oxygen supply regulator through a line secured to an inlet 21.
  • the tube 19 is connected by a flexible pipe 20 to another inflatable tube 22 also having a cross-section similar to a figure eight but which is annular.
  • This tube 22 is secured to resilient pads 25 which are aflixed to the interior of the helmet shell 1.
  • the tubes 19 and 22 are inflated at the same pressure when the helmet is pressurized but are at a higher pressure than the pressure in the space 8.
  • the pressure in the tubes may be pre-set so as to ensure that there is always a pressure diflerence between the tube pressure and the pressure in the space even when the latter is at its maximum value.
  • the tubes can be made to sense the pressure i the space and maintain a higher pressure in themselves so that a corresponding pressure difference exists for any pressure in the space 8. Both tubes tend to take up a circular crosssection when inflated but are compressed slightly to form seals with the wearers skin.
  • the tube 22 defines a space 12 on the top of the wearers head which remains unpressurized.
  • a vent '13 is provided in the top of the shell 1 so that any leakage past the tube 22 does not cause the space 12 to become pressurized.
  • the space 12 has an area substantially equal to the area of the neck of the helmet (or wearer), that is to say the cross-sectional area defined by the tube 19, and it can thus be seen that the result is that the upward force which is associated with conventional helmets is eliminated for the reasons given previously.
  • a seal is provided between the edges of the visor 3 and the shell 1 by an annular inflatable tube 23 which is connected by a flexible pipe 26 to the tube 22 so that all three tubes inflate together.
  • the helmet shown in FIGURE 2 is basically similar to that which has just been described and the same reference numerals are used to indicate similar components.
  • a splitring 9 and a ring 11 respectively of resilient foam padding are provided instead of the inflatable tubes 19 and 20, a splitring 9 and a ring 11 respectively of resilient foam padding.
  • the foam padding is rendered pressure-tight by means of an impermeable skin which covers it.
  • the ring 11 and the split-ring 9 are compressed when the helmet is being worn and serve the same purpose as the tubes 19 and 22.
  • the split-ring 9 is provided with a socalled reflected edge seal consisting of a flexible lip 10 of rubber or similar material. When the helmet is pressurized, the internal pressure in the space 9 presses the lip 10 against the wearers neck thus forming a seal.
  • the helmet of FIGURE 2 has a resilient padded ring 14 in place of the inflatable tube 23 which provides a seal between the edges of the visor when the latter is in the lower closed position.
  • the helmet shown in FIGURE 3 forms part of a fullpressure suit and is attached to the body part 16 of the suit by a pressure-tight lock 17 carried on a rotatable neck carried on a rotatable neck race.
  • the same reference numerals are again used for similar components and it will be seen that the neck-seal is no longer present.
  • the front part of the helmet does not open as in the two constructions previously described.
  • a reflected edge seal in the form of an outwardly extending lip 18 is attached to it.
  • this lip may be of rubber or a similar material and is pressed against the wearers head by the pressure in the pressurized space 8 to give an improved seal.
  • a reflected edge seal could be provided in addition to the annular member in the construction of FIGURE 1 or alternatively the annular member alone could be provided in the construction of FIGURE 3.
  • leakage from the pressurized space 8 should be as small as possible.
  • a pressurized airmans helmet comprising:
  • vent means located in the top of said helmet for venting said area defined by said annular resilient member to the exterior of said helmet, the remainder of said helmet being fluid tight.
  • a helmet according to claim 1 in which the said resilient member is an inflatable tube which is inflated at a higher pressure than the said helmet when the latter is pressurized.
  • a pressurized airmans helmet comprising:
  • a pressure-tight attachment means attached to said shell for attaching said helmet to a full pressure suit
  • vent means located in the top of said helmet for venting said area defined by said annular resilient member to the exterior of said helmet, the remainder of said helmet being fluid tight.
  • a helmet according to claim 5 in which said resilient member is an inflatable tube which is inflated at a higher pressure than the said helmet when the latter is pressurized.
  • a helmet according to claim 5 in which said resilient member includes a flexible lip extending outwardly and is such that when said helmet is pressurized, the said lip is pressed against the head of the wearer by internal pressure.
  • a helmet as defined by claim 5 in which the said sealing surface is faced with a textured material.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Helmets And Other Head Coverings (AREA)
US577226A 1965-09-09 1966-09-06 Airmen's helmets Expired - Lifetime US3438060A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38553/65A GB1144317A (en) 1965-09-09 1965-09-09 Improvements relating to airmens' helmets

Publications (1)

Publication Number Publication Date
US3438060A true US3438060A (en) 1969-04-15

Family

ID=10404226

Family Applications (1)

Application Number Title Priority Date Filing Date
US577226A Expired - Lifetime US3438060A (en) 1965-09-09 1966-09-06 Airmen's helmets

Country Status (4)

Country Link
US (1) US3438060A (enrdf_load_stackoverflow)
BE (1) BE686612A (enrdf_load_stackoverflow)
GB (1) GB1144317A (enrdf_load_stackoverflow)
SE (1) SE307514B (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645259A (en) * 1970-10-23 1972-02-29 Us Navy Crewman{3 s head positioning and restraining device
US3735432A (en) * 1971-01-06 1973-05-29 B Kreten Collapsible water mattress frame
US4070712A (en) * 1975-09-17 1978-01-31 Bayerische Motoren Werke Aktiengesellschaft Clear window for protective helmets
US4133308A (en) * 1976-04-07 1979-01-09 Racal-Amplivox Communications Ltd. Protective devices
US4172455A (en) * 1976-12-28 1979-10-30 Intertechnique Breathing equipment for high altitude flights
US4250877A (en) * 1978-05-15 1981-02-17 Morse Diving Equipment Company, Inc. Diver's helmet and face mask for use therewith
US4294243A (en) * 1978-12-08 1981-10-13 The United States Of America As Represented By The Secretary Of The Air Force Respirators
USRE31424E (en) * 1977-12-09 1983-10-25 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Respirators
DE3220690A1 (de) * 1982-06-02 1983-12-08 HABRA elektronik Gesellschaft mbH, 8000 München Sturzhelm, insbesondere fuer motorradfahrer
US4552140A (en) * 1983-04-29 1985-11-12 Erie Manufacturing Co. Emergency escape device
US4622696A (en) * 1983-10-31 1986-11-18 Griffiths Joseph A Under helmet hood for aircrew
US5050240A (en) * 1990-05-14 1991-09-24 Kaiser Aerospace And Electronics Corporation Air cushion helmet support and ventilation system with air pressure regulator
EP0483020A1 (fr) * 1990-10-26 1992-04-29 Intertechnique Equipement respiratoire de protection d'équipage d'aéronef
US5219368A (en) * 1991-06-03 1993-06-15 Jared Page Bladder-cushioned helmet assembly
US5237707A (en) * 1989-06-03 1993-08-24 Aran Fire & Safety (U.K.) Ltd. Safety helmets
EP0710492A1 (fr) * 1994-11-07 1996-05-08 Intertechnique Equipement individuel de protection contre les agressions NBC
US6055666A (en) * 1995-05-19 2000-05-02 Eklund; Joergen Face shield
US20030135915A1 (en) * 2002-01-24 2003-07-24 Starmed S.P.A. Helmet for artificial respiration without the aid of masks
US6775850B1 (en) 2003-06-12 2004-08-17 Morning Pride Manufacturing, L.L.C. Protective combination comprising face mask, protective garment having hood, and inflatable seal, for firefighter or emergency worker
US20050061317A1 (en) * 2003-09-18 2005-03-24 King John H. Inflatable respirator hood
CN108853825A (zh) * 2018-04-09 2018-11-23 江山显进机电科技服务有限公司 设备用出气接头的正压式空气呼吸器
CN109011247A (zh) * 2018-07-23 2018-12-18 杭州市水务控股集团有限公司 一种防窒息安全头盔
US11278751B2 (en) * 2018-06-06 2022-03-22 Safran Aerotechnics Sas Protection and respiratory equipment for aircraft pilot and individual user

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491339A1 (fr) * 1980-10-02 1982-04-09 Fenzy Cie Sa Cagoule de survie
US5156145A (en) * 1988-11-17 1992-10-20 Life Support Technology Corporation Self-contained breathing system apparatus with automatic back-up
GB2435430B (en) * 2006-02-24 2008-11-05 Guy Dennis Hutchinson A ventilation apparatus

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US622677A (en) * 1899-04-11 gallagher
US1635456A (en) * 1925-12-10 1927-07-12 James H Bowditch Hat
US1945919A (en) * 1930-08-20 1934-02-06 Seijo Modesto Fernandez Life saving mask
US2411831A (en) * 1946-06-19 1946-11-26 William H Lehmberg Detachable sweatband
US2628361A (en) * 1950-03-22 1953-02-17 Joseph G Heyck Browband
US2935985A (en) * 1951-11-19 1960-05-10 Int Latex Corp Airtight helmet
US3149632A (en) * 1961-02-01 1964-09-22 Goodrich Co B F Head covering assembly with face and visor seals
US3295522A (en) * 1962-09-04 1967-01-03 Howard L Johnson Wearable cooling respiratory device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US622677A (en) * 1899-04-11 gallagher
US1635456A (en) * 1925-12-10 1927-07-12 James H Bowditch Hat
US1945919A (en) * 1930-08-20 1934-02-06 Seijo Modesto Fernandez Life saving mask
US2411831A (en) * 1946-06-19 1946-11-26 William H Lehmberg Detachable sweatband
US2628361A (en) * 1950-03-22 1953-02-17 Joseph G Heyck Browband
US2935985A (en) * 1951-11-19 1960-05-10 Int Latex Corp Airtight helmet
US3149632A (en) * 1961-02-01 1964-09-22 Goodrich Co B F Head covering assembly with face and visor seals
US3295522A (en) * 1962-09-04 1967-01-03 Howard L Johnson Wearable cooling respiratory device

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645259A (en) * 1970-10-23 1972-02-29 Us Navy Crewman{3 s head positioning and restraining device
US3735432A (en) * 1971-01-06 1973-05-29 B Kreten Collapsible water mattress frame
US4070712A (en) * 1975-09-17 1978-01-31 Bayerische Motoren Werke Aktiengesellschaft Clear window for protective helmets
US4133308A (en) * 1976-04-07 1979-01-09 Racal-Amplivox Communications Ltd. Protective devices
US4172455A (en) * 1976-12-28 1979-10-30 Intertechnique Breathing equipment for high altitude flights
USRE31424E (en) * 1977-12-09 1983-10-25 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Respirators
US4250877A (en) * 1978-05-15 1981-02-17 Morse Diving Equipment Company, Inc. Diver's helmet and face mask for use therewith
US4294243A (en) * 1978-12-08 1981-10-13 The United States Of America As Represented By The Secretary Of The Air Force Respirators
DE3220690A1 (de) * 1982-06-02 1983-12-08 HABRA elektronik Gesellschaft mbH, 8000 München Sturzhelm, insbesondere fuer motorradfahrer
US4552140A (en) * 1983-04-29 1985-11-12 Erie Manufacturing Co. Emergency escape device
US4622696A (en) * 1983-10-31 1986-11-18 Griffiths Joseph A Under helmet hood for aircrew
US5237707A (en) * 1989-06-03 1993-08-24 Aran Fire & Safety (U.K.) Ltd. Safety helmets
US5050240A (en) * 1990-05-14 1991-09-24 Kaiser Aerospace And Electronics Corporation Air cushion helmet support and ventilation system with air pressure regulator
EP0483020A1 (fr) * 1990-10-26 1992-04-29 Intertechnique Equipement respiratoire de protection d'équipage d'aéronef
FR2668373A1 (fr) * 1990-10-26 1992-04-30 Intertechnique Sa Equipement respiratoire de protection d'equipage d'aeronef.
US5219368A (en) * 1991-06-03 1993-06-15 Jared Page Bladder-cushioned helmet assembly
EP0710492A1 (fr) * 1994-11-07 1996-05-08 Intertechnique Equipement individuel de protection contre les agressions NBC
FR2726478A1 (fr) * 1994-11-07 1996-05-10 Intertechnique Sa Equipement individuel de protection contre les agressions nbc
US5575278A (en) * 1994-11-07 1996-11-19 Intertechnique Individual equipment for protection against NBC attacks
AU689328B2 (en) * 1994-11-07 1998-03-26 Intertechnique Individual equipment for protection against NBC attacks
US6055666A (en) * 1995-05-19 2000-05-02 Eklund; Joergen Face shield
US6792623B2 (en) * 2002-01-24 2004-09-21 Starmed S.P.A. Helmet for artificial respiration without the aid of masks
US20030135915A1 (en) * 2002-01-24 2003-07-24 Starmed S.P.A. Helmet for artificial respiration without the aid of masks
US6775850B1 (en) 2003-06-12 2004-08-17 Morning Pride Manufacturing, L.L.C. Protective combination comprising face mask, protective garment having hood, and inflatable seal, for firefighter or emergency worker
WO2005004654A1 (en) * 2003-06-12 2005-01-20 Morning Pride Manufacturing, L.L.C. Protective combination comprising face mask, protective garment having hood, and inflatable seal, for firefighter or emergency worker
US20050061317A1 (en) * 2003-09-18 2005-03-24 King John H. Inflatable respirator hood
US7156093B2 (en) * 2003-09-18 2007-01-02 E. D. Bullard Company Inflatable respirator hood
CN108853825A (zh) * 2018-04-09 2018-11-23 江山显进机电科技服务有限公司 设备用出气接头的正压式空气呼吸器
CN108853825B (zh) * 2018-04-09 2020-08-11 扬州江亚消防装备有限公司 设备用出气接头的正压式空气呼吸器
US11278751B2 (en) * 2018-06-06 2022-03-22 Safran Aerotechnics Sas Protection and respiratory equipment for aircraft pilot and individual user
CN109011247A (zh) * 2018-07-23 2018-12-18 杭州市水务控股集团有限公司 一种防窒息安全头盔
CN109011247B (zh) * 2018-07-23 2020-09-08 杭州市水务控股集团有限公司 一种防窒息安全头盔

Also Published As

Publication number Publication date
BE686612A (enrdf_load_stackoverflow) 1967-03-08
GB1144317A (en) 1969-03-05
SE307514B (enrdf_load_stackoverflow) 1969-01-07

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